Dasar-dasar GUI Java

Contoh program: guijava.java
import javax.swing.JLabel;
import javax.swing.JTextField;
import javax.swing.JButton;
import javax.swing.JPanel;
import javax.swing.JOptionPane;
import java.awt.GridLayout;
import javax.swing.JFrame;
import java.awt.event.ActionListener;
import java.awt.event.ActionEvent;
public class guijava implements ActionListener {
JLabel labelBilangan1 = new JLabel(“bilangan 1: “);
JTextField fieldBilangan1 = new JTextField(10);
JLabel labelBilangan2 = new JLabel(“bilangan 2: “);
JTextField fieldBilangan2 = new JTextField(10);
JLabel labelHasil = new JLabel(“hasil: “);
JTextField fieldHasil = new JTextField(10);
JButton buttonTambah = new JButton(“tambah”);
JButton buttonHapus = new JButton(“hapus”);
JPanel panelPenjumlahan = new JPanel();
guijava(){
GridLayout gl = new GridLayout(4,2);
panelPenjumlahan.setLayout(gl);
panelPenjumlahan.add(labelBilangan1);
panelPenjumlahan.add(fieldBilangan1);
panelPenjumlahan.add(labelBilangan2);
panelPenjumlahan.add(fieldBilangan2);
panelPenjumlahan.add(labelHasil);
panelPenjumlahan.add(fieldHasil);
panelPenjumlahan.add(buttonTambah);
panelPenjumlahan.add(buttonHapus);
buttonTambah.addActionListener(this);
buttonHapus.addActionListener(this);
JFrame jendela = new JFrame(“Contoh GUI Java”);
jendela.setContentPane(panelPenjumlahan);
jendela.setSize(400,150);
jendela.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
jendela.setVisible(true);
jendela.setResizable(false);
}
public static void main(String[] args) {
guijava contohGUI = new guijava();
}
public void actionPerformed(ActionEvent kejadian) {
try {
if(kejadian.getSource() == buttonTambah) {
int bilangan1 = Integer.parseInt(fieldBilangan1.getText());
int bilangan2 = Integer.parseInt(fieldBilangan2.getText());
int hasil = bilangan1 + bilangan2;
fieldHasil.setText(Integer.toString(hasil));
}
else {
fieldBilangan1.setText(“”);
fieldBilangan2.setText(“”);
fieldHasil.setText(“”);
fieldBilangan1.requestFocus();
}
}
catch(Exception a) {
JOptionPane.showMessageDialog(panelPenjumlahan, “anda salah memasukkan angka.”);
}
}
}
Output program:

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Contoh Program Manajemen Database Sederhana dengan Java

Contoh Program: insert.java
import javax.swing.*;
import java.awt.GridLayout;
import java.awt.event.*;
import java.sql.*;
public class insert implements ActionListener {
JLabel labelNama = new JLabel(“nama:”);
JTextField fieldNama = new JTextField(10);
JLabel labelNim = new JLabel(“nim:”);
JTextField fieldNim = new JTextField(10);
JLabel labelProdi = new JLabel(“prodi:”);
JTextField fieldProdi = new JTextField(10);
JLabel labelAlamat = new JLabel(“alamat:”);
JTextField fieldAlamat = new JTextField(10);
JLabel labelKota = new JLabel(“kota:”);
JTextField fieldKota = new JTextField(10);
JButton tombolSimpan = new JButton(“simpan”);
JButton tombolBatal = new JButton(“batal”);
JPanel panel = new JPanel();
insert(){
GridLayout gl = new GridLayout(6,2);
panel.setLayout(gl);
panel.add(labelNim);
panel.add(fieldNim);
panel.add(labelNama);
panel.add(fieldNama);
panel.add(labelProdi);
panel.add(fieldProdi);
panel.add(labelAlamat);
panel.add(fieldAlamat);
panel.add(labelKota);
panel.add(fieldKota);
panel.add(tombolSimpan);
panel.add(tombolBatal);
tombolSimpan.addActionListener(this);
tombolBatal.addActionListener(this);
JFrame frame = new JFrame(“input data”);
frame.setContentPane(panel);
frame.setSize(400,200);
frame.setVisible(true);
//frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setResizable(false);
}
public void actionPerformed(ActionEvent event) {
try {
if(event.getSource()==tombolSimpan) {
String nama = fieldNama.getText();
String nim = fieldNim.getText();
String prodi = fieldProdi.getText();
String alamat = fieldAlamat.getText();
String kota = fieldKota.getText();
Class.forName(“com.mysql.jdbc.Driver”);
System.out.println(“driver JDBC ditemukan…”);
//String url = “jdbc:mysql://localhost:3306/dbmahasiswa?user=root&password=t3l0g0dh0g”;
Connection koneksi = DriverManager.getConnection(“jdbc:mysql://localhost:3306/dbmahasiswa”,
“root”,”t3l0g0dh0g”);
System.out.println(“koneksi sukses…”);
Statement statement = koneksi.createStatement();
String sql = “INSERT INTO mahasiswa values (‘”+nim+”‘,’”+nama+”‘,’”+prodi+”‘,’”+alamat+”‘,’”+kota+”‘);”;
statement.executeUpdate(sql);
fieldNama.setText(“”);
fieldNim.setText(“”);
fieldProdi.setText(“”);
fieldAlamat.setText(“”);
fieldKota.setText(“”);
statement.close();
koneksi.close();
JOptionPane.showMessageDialog(panel, “data sukses tersimpan…”);
}
}
catch(Exception e) {
System.out.println(“salah”);
}
if(event.getSource()==tombolBatal){
fieldNama.setText(“”);
fieldNim.setText(“”);
fieldProdi.setText(“”);
fieldAlamat.setText(“”);
fieldKota.setText(“”);
}
}
public static void main(String[] args) {
insert insertRecord = new insert();
}
}
Output program:

tampilan program insert.java

Contoh program: update.java
import javax.swing.*;
import java.awt.GridLayout;
import java.awt.event.*;
import java.sql.*;
public class update implements ActionListener {
JTextField fieldCari = new JTextField(10);
JButton tombolCari = new JButton(“cari”);
JLabel labelNama = new JLabel(“nama:”);
JTextField fieldNama = new JTextField(10);
JLabel labelNim = new JLabel(“nim:”);
JTextField fieldNim = new JTextField(10);
JLabel labelProdi = new JLabel(“prodi:”);
JTextField fieldProdi = new JTextField(10);
JLabel labelAlamat = new JLabel(“alamat:”);
JTextField fieldAlamat = new JTextField(10);
JLabel labelKota = new JLabel(“kota:”);
JTextField fieldKota = new JTextField(10);
JButton tombolUpdate = new JButton(“update”);
JButton tombolBatal = new JButton(“batal”);
JPanel panel = new JPanel();
update(){
GridLayout gl = new GridLayout(7,2);
panel.setLayout(gl);
panel.add(fieldCari);
panel.add(tombolCari);
panel.add(labelNim);
panel.add(fieldNim);
panel.add(labelNama);
panel.add(fieldNama);
panel.add(labelProdi);
panel.add(fieldProdi);
panel.add(labelAlamat);
panel.add(fieldAlamat);
panel.add(labelKota);
panel.add(fieldKota);
panel.add(tombolUpdate);
panel.add(tombolBatal);
tombolCari.addActionListener(this);
tombolUpdate.addActionListener(this);
tombolBatal.addActionListener(this);
JFrame frame = new JFrame(“update data”);
frame.setContentPane(panel);
frame.setSize(400,200);
frame.setVisible(true);
//frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setResizable(false);
}
public void actionPerformed(ActionEvent event) {
try {
if(event.getSource() == tombolUpdate) {
String nim = fieldNim.getText();
String nama = fieldNama.getText();
String prodi = fieldProdi.getText();
String alamat = fieldAlamat.getText();
String kota = fieldKota.getText();
Class.forName(“com.mysql.jdbc.Driver”);
System.out.println(“driver JDBC ditemukan…”);
//String url = “jdbc:mysql://localhost:3306/dbmahasiswa?user=root&password=t3l0g0dh0g”;
Connection koneksi = DriverManager.getConnection(“jdbc:mysql://localhost:3306/dbmahasiswa”,
“root”,”t3l0g0dh0g”);
System.out.println(“koneksi sukses…”);
Statement statement = koneksi.createStatement();
String sql= “UPDATE mahasiswa set nama=’”+nama+”‘,prodi=’”+prodi+”‘,alamat=’”+alamat+”‘,kota=’”+kota+”‘ WHERE nim=’”+nim+”‘”;
statement.executeUpdate(sql);
fieldNama.setText(“”);
fieldNim.setText(“”);
fieldProdi.setText(“”);
fieldAlamat.setText(“”);
fieldKota.setText(“”);
statement.close();
koneksi.close();
JOptionPane.showMessageDialog(panel, “data telah ter-update…”);
}
else if(event.getSource() == tombolBatal) {
fieldNama.setText(“”);
fieldNim.setText(“”);
fieldProdi.setText(“”);
fieldAlamat.setText(“”);
fieldKota.setText(“”);
}
else if(event.getSource() == tombolCari) {
String cari = fieldCari.getText();
Class.forName(“com.mysql.jdbc.Driver”);
System.out.println(“driver JDBC ditemukan…”);
//String url = “jdbc:mysql://localhost:3306/dbmahasiswa?user=root&password=t3l0g0dh0g”;
Connection koneksi = DriverManager.getConnection(“jdbc:mysql://localhost:3306/dbmahasiswa”,
“root”,”t3l0g0dh0g”);
System.out.println(“koneksi sukses…”);
Statement statement = koneksi.createStatement();
String sql = “SELECT * FROM mahasiswa WHERE nim LIKE ‘”+cari+”‘”;
ResultSet rs = statement.executeQuery(sql);
if(rs.next()) {
fieldNim.setText(rs.getString(1));
fieldNama.setText(rs.getString(2));
fieldProdi.setText(rs.getString(3));
fieldAlamat.setText(rs.getString(4));
fieldKota.setText(rs.getString(5));
} else {
JOptionPane.showMessageDialog(panel, “nim ” + cari + ” tidak ditemukan”);
}
statement.close();
koneksi.close();
}
}
catch(Exception e) {
System.out.println(“terjadi kesalahan”);
}
}
public static void main(String[] args) {
update deleteRecord = new update();
}
}
Output program:

tampilan program update.java

Contoh program: delete.java
import javax.swing.*;
import java.awt.GridLayout;
import java.awt.event.*;
import java.sql.*;
public class delete implements ActionListener {
JTextField fieldCari = new JTextField(10);
JButton tombolCari = new JButton(“cari”);
JLabel labelNama = new JLabel(“nama:”);
JTextField fieldNama = new JTextField(10);
JLabel labelNim = new JLabel(“nim:”);
JTextField fieldNim = new JTextField(10);
JLabel labelProdi = new JLabel(“prodi:”);
JTextField fieldProdi = new JTextField(10);
JLabel labelAlamat = new JLabel(“alamat:”);
JTextField fieldAlamat = new JTextField(10);
JLabel labelKota = new JLabel(“kota:”);
JTextField fieldKota = new JTextField(10);
JButton tombolHapus = new JButton(“hapus”);
JButton tombolBatal = new JButton(“batal”);
JPanel panel = new JPanel();
delete(){
GridLayout gl = new GridLayout(7,2);
panel.setLayout(gl);
panel.add(fieldCari);
panel.add(tombolCari);
panel.add(labelNim);
panel.add(fieldNim);
panel.add(labelNama);
panel.add(fieldNama);
panel.add(labelProdi);
panel.add(fieldProdi);
panel.add(labelAlamat);
panel.add(fieldAlamat);
panel.add(labelKota);
panel.add(fieldKota);
panel.add(tombolHapus);
panel.add(tombolBatal);
tombolCari.addActionListener(this);
tombolHapus.addActionListener(this);
tombolBatal.addActionListener(this);
JFrame frame = new JFrame(“delete data”);
frame.setContentPane(panel);
frame.setSize(400,200);
frame.setVisible(true);
//frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setResizable(false);
}
public void actionPerformed(ActionEvent event) {
try {
if(event.getSource() == tombolHapus) {
String nim = fieldNim.getText();
Class.forName(“com.mysql.jdbc.Driver”);
System.out.println(“driver JDBC ditemukan…”);
//String url = “jdbc:mysql://localhost:3306/dbmahasiswa?user=root&password=t3l0g0dh0g”;
Connection koneksi = DriverManager.getConnection(“jdbc:mysql://localhost:3306/dbmahasiswa”,
“root”,”t3l0g0dh0g”);
System.out.println(“koneksi sukses…”);
Statement statement = koneksi.createStatement();
String sql = “DELETE FROM mahasiswa WHERE nim=’”+nim+”‘”;
statement.executeUpdate(sql);
fieldNama.setText(“”);
fieldNim.setText(“”);
fieldProdi.setText(“”);
fieldAlamat.setText(“”);
fieldKota.setText(“”);
statement.close();
koneksi.close();
JOptionPane.showMessageDialog(panel, “data telah terhapus…”);
}
else if(event.getSource() == tombolBatal) {
fieldNama.setText(“”);
fieldNim.setText(“”);
fieldProdi.setText(“”);
fieldAlamat.setText(“”);
fieldKota.setText(“”);
}
else if(event.getSource() == tombolCari) {
String cari = fieldCari.getText();
Class.forName(“com.mysql.jdbc.Driver”);
System.out.println(“driver JDBC ditemukan…”);
//String url = “jdbc:mysql://localhost:3306/dbmahasiswa?user=root&password=t3l0g0dh0g”;
Connection koneksi = DriverManager.getConnection(“jdbc:mysql://localhost:3306/dbmahasiswa”,
“root”,”t3l0g0dh0g”);
System.out.println(“koneksi sukses…”);
Statement statement = koneksi.createStatement();
String sql = “SELECT * FROM mahasiswa WHERE nim LIKE ‘”+cari+”‘”;
ResultSet rs = statement.executeQuery(sql);
if(rs.next()) {
fieldNim.setText(rs.getString(1));
fieldNama.setText(rs.getString(2));
fieldProdi.setText(rs.getString(3));
fieldAlamat.setText(rs.getString(4));
fieldKota.setText(rs.getString(5));
} else {
JOptionPane.showMessageDialog(panel, “nim ” + cari + ” tidak ditemukan”);
}
statement.close();
koneksi.close();
}
}
catch(Exception e) {
System.out.println(“terjadi kesalahan”);
}
}
public static void main(String[] args) {
delete deleteRecord = new delete();
}
}
Output program:

tampilan program delete.java

Contoh program: gabungan insert, delete, dan hapus (gabung.java)
import javax.swing.*;
import java.awt.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.FlowLayout;
public class gabung implements ActionListener {
JMenuBar menu = new JMenuBar();
JMenu menuFile = new JMenu(“File”);
JMenuItem subMenuInsert = new JMenuItem(“Insert Data”,’S’);
JMenuItem subMenuDelete = new JMenuItem(“Delete Data”,’D’);
JMenuItem subMenuUpdate = new JMenuItem(“Update Data”,’U’);
JMenuItem subMenuQuit = new JMenuItem(“Quit”,’Q’);
Container container = new Container();
JPanel panel = new JPanel();
gabung() {
JFrame frame = new JFrame(“Java DataBase Manajemen Sistem”);
frame.setSize(640,480);
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setJMenuBar(menu);
menuFile.setMnemonic(‘F’);
subMenuInsert.addActionListener(this);
subMenuDelete.addActionListener(this);
subMenuUpdate.addActionListener(this);
subMenuQuit.addActionListener(this);
menu.add(menuFile);
menuFile.add(subMenuInsert);
menuFile.add(subMenuDelete);
menuFile.add(subMenuUpdate);
menuFile.addSeparator();
menuFile.add(subMenuQuit);
menu.setSize(400,100);
menu.setLocation(60,60);
menu.setVisible(true);
FlowLayout fl = new FlowLayout();
panel.setLayout(fl);
frame.setContentPane(panel);
frame.setVisible(true);
}
public static void main(String[] args) {
gabung gabungan = new gabung();
}
public void actionPerformed(ActionEvent event) {
if(event.getSource() == subMenuInsert) {
frameInsert();
} else if(event.getSource() == subMenuDelete) {
frameDelete();
} else if(event.getSource() == subMenuUpdate) {
frameUpdate();
} else if (event.getSource() == subMenuQuit) {
System.exit(0);
}
}
private void frameInsert() {
insert frameInsert = new insert();
}
private void frameDelete() {
delete frameDelete = new delete();
}
private void frameUpdate() {
update frameUpdate = new update();
}
}
Output program:

Tampilan program gabungan.java

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Akses Database Menggunakan Java

Akses Database Menggunakan Java

import javax.swing.*;
import java.awt.GridLayout;
import java.awt.BorderLayout;
import java.awt.event.*;
import java.sql.*;
import javax.swing.table.DefaultTableModel;
public class sisip implements ActionListener {
JLabel labelNama = new JLabel(“nama:”);
JTextField fieldNama = new JTextField(10);
JLabel labelNim = new JLabel(“nim:”);
JTextField fieldNim = new JTextField(10);
JLabel labelProdi = new JLabel(“prodi:”);
JTextField fieldProdi = new JTextField(10);
JLabel labelAlamat = new JLabel(“alamat:”);
JTextField fieldAlamat = new JTextField(10);
JLabel labelKota = new JLabel(“kota:”);
JTextField fieldKota = new JTextField(10);
JButton tombolSimpan = new JButton(“simpan”);
JButton tombolBatal = new JButton(“batal”);
JPanel panelSemua = new JPanel();
JPanel panelAtas = new JPanel();
JPanel panelCenter = new JPanel();
JScrollPane scrollPane = new JScrollPane();
JTable tabel = new JTable();
DefaultTableModel tabMode;
Connection koneksi;
sisip(){
BorderLayout bl = new BorderLayout();
panelSemua.setLayout(bl);
GridLayout gl1 = new GridLayout(6,2);
panelAtas.setLayout(gl1);
panelAtas.add(labelNim);
panelAtas.add(fieldNim);
panelAtas.add(labelNama);
panelAtas.add(fieldNama);
panelAtas.add(labelProdi);
panelAtas.add(fieldProdi);
panelAtas.add(labelAlamat);
panelAtas.add(fieldAlamat);
panelAtas.add(labelKota);
panelAtas.add(fieldKota);
panelAtas.add(tombolSimpan);
panelAtas.add(tombolBatal);
panelSemua.add(“North”, panelAtas);
Object[] row = {“NIM”, “Nama”, “Prodi”, “Alamat”, “Kota”};
tabMode = new DefaultTableModel(null, row);
tabel.setModel(tabMode);
scrollPane.getViewport().add(tabel, null);
panelSemua.add(“Center”, scrollPane);
koneksiDatabase();
tampilDataKeTabel();
tombolSimpan.addActionListener(this);
tombolBatal.addActionListener(this);
JFrame frame = new JFrame(“input data”);
frame.setContentPane(panelSemua);
frame.setSize(400,250);
frame.setVisible(true);
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setResizable(true);
}
public void actionPerformed(ActionEvent kejadian) {
try {
if(kejadian.getSource()==tombolSimpan) {
String nama = fieldNama.getText();
String nim = fieldNim.getText();
String prodi = fieldProdi.getText();
String alamat = fieldAlamat.getText();
String kota = fieldKota.getText();
//Class.forName(“com.mysql.jdbc.Driver”);
//System.out.println(“driver JDBC ditemukan…”);
//String url = “jdbc:mysql://localhost:3306/dbmahasiswa?user=root&password=t3l0g0dh0g”;
//Connection koneksi = DriverManager.getConnection(“jdbc:mysql://localhost:3306/dbmahasiswa”,
//                                                 “root”,”t3l0g0dh0g”);
//System.out.println(“koneksi sukses…”);
koneksiDatabase();
Statement perintah = koneksi.createStatement();
String sql = “INSERT INTO mahasiswa VALUES (‘”+nim+”‘,’”+nama+”‘,’”+prodi+”‘,’”+alamat+”‘,’”+kota+”‘);”;
perintah.executeUpdate(sql);
fieldNama.setText(“”);
fieldNim.setText(“”);
fieldProdi.setText(“”);
fieldAlamat.setText(“”);
fieldKota.setText(“”);
//perintah.close();
//koneksi.close();
JOptionPane.showMessageDialog(panelSemua, “data sukses tersimpan…”);
//hapusTabel();
tampilDataKeTabel();
}
}
catch(Exception e) {
System.out.println(“terjadi error…”);
}
if(kejadian.getSource()==tombolBatal){
fieldNama.setText(“”);
fieldNim.setText(“”);
fieldProdi.setText(“”);
fieldAlamat.setText(“”);
fieldKota.setText(“”);
}
}
public void koneksiDatabase() {
try {
Class.forName(“com.mysql.jdbc.Driver”);
System.out.println(“JDBC ditemukan…”);
try {
String url = “jdbc:mysql://localhost:3306/dbmahasiswa?user=root&password=t3l0g0dh0g”;
koneksi = DriverManager.getConnection(url);
System.out.println(“koneksi sukses…”);
}
catch (SQLException se) {
System.out.println(“koneksi gagal = ” + se);
System.exit(0);
}
}
catch (ClassNotFoundException cnfe) {
System.out.println(“class tidak ditemukan… error: ” + cnfe);
System.exit(0);
}
}
public void tampilDataKeTabel() {
hapusTabel();
try {
String sql = “SELECT * FROM mahasiswa”;
Statement stat = koneksi.createStatement();
ResultSet set = stat.executeQuery(sql);
while(set.next()) {
String nim = set.getString(“nim”);
String nama = set.getString(“nama”);
String prodi = set.getString(“prodi”);
String alamat = set.getString(“alamat”);
String kota = set.getString(“kota”);
String[] data = {nim, nama, prodi, alamat, kota};
tabMode.addRow(data);
}
}
catch (Exception e) {
}
}
public void hapusTabel() {
int row = tabMode.getRowCount();
for(int i=0; i<row; i++) {
tabMode.removeRow(0);
}
}
public static void main(String[] args) {
sisip insertRecord = new sisip();
}
}
Output Program:

sebelum sisip record baru

setelah penyisipan record baru

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Pencarian Elemen dalam Array

Terdapat dua algoritma pencarian elemen array yaitu algoritma linear search dan binary search. Dalam artikel pertama ini ditulis contoh program yang menggunakan pencarian elemen array dengan algoritma linier search. Ada dua contoh program, linear search berbasis teks dan GUI (graphical user interface). Untuk algoritma yang lain akan ditulis pada artikel berikutnya.

LINEAR SEARCH – NON GUI
Nama Program: linearSearch.Java
public class linearSearch {
public static void main(String[] args) {
int array[] = new int[5];
array[0] = 10;
array[1] = 25;
array[2] = 15;
array[3] = 35;
array[4] = 5;
for(int index=0; index<array.length; index++) {
System.out.print(array[index] + ” “);
}
System.out.println(“”);
int cari = 25;
boolean ketemu = false;
for(int index=0; index<array.length; index++) {
if(array[index] == cari){
ketemu = true;
break;
}
}
if(ketemu == true) {
System.out.println(“elemen ” + cari + ” ditemukan…”);
} else {
System.out.println(“elemen ” + cari + ” tidak ditemukan…”);
}
}
}
Output program:
10 25 15 35 5
elemen 25 ditemukan…
LINEAR SEARCH – GUI
Nama Program: LinearSearchGui.java
import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
public class LinearSearchGui {
JPanel panelKiri = new JPanel();
JPanel panelKanan = new JPanel();
JPanel panelSemua = new JPanel();
JTextField[] fieldArray = new JTextField[10];
JLabel[] label = new JLabel[10];
JTextField sisipElemen = new JTextField(5);
JButton buttonSisip = new JButton(“Sisip”);
JTextField hapusElemen = new JTextField(5);
JButton buttonHapus = new JButton(“Hapus”);
JTextField cariElemen = new JTextField(5);
JButton buttonCari = new JButton(“Cari”);
LinearSearchGui() {
BorderLayout bl = new BorderLayout();
panelSemua.setLayout(bl);
GridLayout gl = new GridLayout(10,2);
panelKiri.setLayout(gl);
for(int x=0; x<fieldArray.length; x++) {
panelKiri.add(label[x] = new JLabel(Integer.toString(x)));
panelKiri.add(fieldArray[x] = new JTextField(5));
}
panelSemua.add(“Center”,panelKiri);
GridLayout gl2 = new GridLayout(3,2);
panelKanan.setLayout(gl2);
panelKanan.add(sisipElemen);
panelKanan.add(buttonSisip);
panelKanan.add(hapusElemen);
panelKanan.add(buttonHapus);
panelKanan.add(cariElemen);
panelKanan.add(buttonCari);
panelSemua.add(“North”,panelKanan);
JFrame jendela = new JFrame(“Array GUI”);
jendela.setContentPane(panelSemua);
jendela.setSize(200,400);
jendela.setResizable(false);
//jendela.pack();
jendela.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
jendela.setVisible(true);
LinearSearchProcess proses = new LinearSearchProcess(this);
buttonSisip.addActionListener(proses);
buttonHapus.addActionListener(proses);
buttonCari.addActionListener(proses);
}
public static void main(String[] args) {
LinearSearchGui linearSearch = new LinearSearchGui();
}
}
Nama Program: LinearSearchProcess.java
import java.awt.Color;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.*;
public class LinearSearchProcess implements ActionListener {
int array[] = new int[10];
int nElemen = 0;
LinearSearchGui induk;
LinearSearchProcess(LinearSearchGui induk) {
this.induk = induk;
}
public void actionPerformed(ActionEvent kejadian) {
if(kejadian.getSource() == induk.buttonSisip) {
array[nElemen] = Integer.parseInt(induk.sisipElemen.getText());
induk.fieldArray[nElemen].setText(Integer.toString(array[nElemen]));
induk.fieldArray[nElemen].setBackground(Color.green);
induk.sisipElemen.setText(“”);
nElemen++;
tampil();
}
else if(kejadian.getSource() == induk.buttonHapus){
int j;
for(int x=0; x<nElemen; x++) {
induk.fieldArray[x].setText(“”);
}
for(j=0; j<nElemen; j++){
if( Integer.parseInt(induk.hapusElemen.getText()) == array[j] )
break;
}
if(j==nElemen)
JOptionPane.showMessageDialog(null, “tidak ada”);
else
{
for(int k=j; k<nElemen; k++) {
array[k] = array[k+1];
//nElemen–;
}
nElemen–;
induk.fieldArray[nElemen].setBackground(Color.white);
}
induk.hapusElemen.setText(“”);
tampil();
}
else if(kejadian.getSource() == induk.buttonCari) {
int cari = Integer.parseInt(induk.cariElemen.getText());
//int cari = 35;
boolean ketemu = false;
int index;
for(index=0; index<nElemen; index++) {
if(array[index] == cari){
ketemu = true;
break;
}
}
if(ketemu == true) {
JOptionPane.showMessageDialog(induk.panelSemua, “elemen ” + cari + ” ditemukan…”);
} else if (ketemu == false) {
JOptionPane.showMessageDialog(induk.panelSemua,”elemen ” + cari + ” tidak ditemukan…”);
}
induk.cariElemen.setText(“”);
}
}
public void tampil(){
for(int x=0; x<nElemen; x++) {
induk.fieldArray[x].setText(” “);
}
for(int x=0; x<nElemen; x++) {
induk.fieldArray[x].setText(Integer.toString(array[x]));
}
}
}
Output program:

Penyisipan elemen array

Pencarian elemen array

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Pencarian Elemen dalam Array (Binary Search)

BINARY SEARCH – NON GUI

Nama program: binarySearch.java
public class binarySearch {
public static void main(String[] args) {
int array[] = new int[5];
array[0] = 25;
array[1] = 30;
array[2] = 35;
array[3] = 40;
array[4] = 45;
int batasAtas = array.length-1;
int batasBawah = 0;
for(int index = 0 ; index<array.length; index++){
System.out.print(array[index] + ” “);
}
System.out.println(“”);
int cari = 30;
boolean belumKetemu = true;
while(belumKetemu) {
int posisiSekarang = (batasAtas + batasBawah)/2;
if (array[posisiSekarang] == cari) {
belumKetemu=false;
System.out.println(“ditemukan ” + cari);
} else if(batasBawah > batasAtas) {
System.out.println(“tidak ditemukan ” + cari);
break;
}
else {
if (array[posisiSekarang] < cari) {
batasBawah = posisiSekarang + 1;
} else {
batasAtas = posisiSekarang – 1;
}
}
}
}
}
Output program:
25 30 35 40 45
ditemukan 30
BINARY SEARCH – GUI
Nama program: BinarySearchGui.java
import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
public class BinarySearchGui {
JPanel panelKiri = new JPanel();
JPanel panelKanan = new JPanel();
JPanel panelSemua = new JPanel();
JTextField[] fieldArray = new JTextField[10];
JLabel[] label = new JLabel[10];
JTextField sisipElemen = new JTextField(5);
JButton buttonSisip = new JButton(“Sisip”);
JTextField hapusElemen = new JTextField(5);
JButton buttonHapus = new JButton(“Hapus”);
JTextField cariElemen = new JTextField(5);
JButton buttonCari = new JButton(“Cari”);
BinarySearchGui() {
BorderLayout bl = new BorderLayout();
panelSemua.setLayout(bl);
GridLayout gl = new GridLayout(10,2);
panelKiri.setLayout(gl);
for(int x=0; x<fieldArray.length; x++) {
panelKiri.add(label[x] = new JLabel(Integer.toString(x)));
panelKiri.add(fieldArray[x] = new JTextField(5));
}
panelSemua.add(“Center”,panelKiri);
GridLayout gl2 = new GridLayout(3,2);
panelKanan.setLayout(gl2);
panelKanan.add(sisipElemen);
panelKanan.add(buttonSisip);
panelKanan.add(hapusElemen);
panelKanan.add(buttonHapus);
panelKanan.add(cariElemen);
panelKanan.add(buttonCari);
panelSemua.add(“North”,panelKanan);
JFrame jendela = new JFrame(“Array GUI”);
jendela.setContentPane(panelSemua);
jendela.setSize(200,400);
jendela.setResizable(false);
//jendela.pack();
jendela.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
jendela.setVisible(true);
BinarySearchProcess proses = new BinarySearchProcess(this);
buttonSisip.addActionListener(proses);
buttonHapus.addActionListener(proses);
buttonCari.addActionListener(proses);
}
public static void main(String[] args) {
BinarySearchGui linearSearch = new BinarySearchGui();
}
}
Nama program: BinarySearchProcess.java
import java.awt.Color;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.*;
public class BinarySearchProcess implements ActionListener{
int array[] = new int[10];
int nElemen = 0;
BinarySearchGui induk;
BinarySearchProcess(BinarySearchGui induk) {
this.induk = induk;
}
public void actionPerformed(ActionEvent kejadian) {
if(kejadian.getSource() == induk.buttonSisip) {
int j;
for(j=0; j<nElemen; j++){
if(array[j] > Integer.parseInt(induk.sisipElemen.getText()))
break;
}
for(int k=nElemen; k>j; k–) {
array[k] = array[k-1];
}
array[j] = Integer.parseInt(induk.sisipElemen.getText());
induk.sisipElemen.setText(“”);
nElemen++;
tampil();
}
else if(kejadian.getSource() == induk.buttonHapus){
int j;
for(int x=0; x<nElemen; x++) {
induk.fieldArray[x].setText(“”);
}
for(j=0; j<nElemen; j++){
if( Integer.parseInt(induk.hapusElemen.getText()) == array[j] )
break;
}
if(j==nElemen)
JOptionPane.showMessageDialog(null, “tidak ada”);
else
{
for(int k=j; k<nElemen; k++) {
array[k] = array[k+1];
//nElemen–;
}
nElemen–;
induk.fieldArray[nElemen].setBackground(Color.white);
}
induk.hapusElemen.setText(“”);
tampil();
}
if(kejadian.getSource() == induk.buttonCari) {
int batasAtas = nElemen-1;
int batasBawah = 0;
int cari = Integer.parseInt(induk.cariElemen.getText());
boolean belumKetemu = true;
while(belumKetemu) {
int posisiSekarang = (batasAtas + batasBawah)/2;
if (array[posisiSekarang] == cari) {
belumKetemu=false;
JOptionPane.showMessageDialog(induk.panelSemua, cari + ” ditemukan”);
} else if(batasBawah > batasAtas) {
JOptionPane.showMessageDialog(induk.panelSemua, cari + ” tidak ditemukan”);
break;
}
else {
if (array[posisiSekarang] < cari) {
batasBawah = posisiSekarang + 1;
} else {
batasAtas = posisiSekarang – 1;
}
}
}
induk.cariElemen.setText(“”);
}
}
public void tampil(){
for(int x=0; x<nElemen; x++) {
induk.fieldArray[x].setText(” “);
}
for(int x=0; x<nElemen; x++) {
induk.fieldArray[x].setText(Integer.toString(array[x]));
}
}
}
Output program:

Pencarian elemen array

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Array (Sorting)

methode rekursif adalah perulangan dengan menggunakan teknik memanggil methode itu sendiri. reskursif tidak mengunakan teknik perulangan iteratif (misalnya for atau while). berikut contoh programnya:SORTING – NON GUI

Nama program: bubbleSort.java

public class BubbleSort {

public static void main(String[] args) {

int array[] = new int[5];

array[0] = 7;

array[1] = 5;

array[2] = 3;

array[3] = 8;

array[4] = 2;

for(int index=0; index<array.length; index++) {

System.out.print(array[index] + ” “);

}

System.out.println(“”);<!--more-->

int kanan;

int kiri;

for(kanan=array.length-1; kanan>0; kanan–) {

for(kiri=0; kiri<kanan; kiri++) {

if( array[kiri] > array[kiri+1] ) {

int temp = array[kiri];

array[kiri] = array[kiri+1];

array[kiri+1] = temp;

}

}

}

Output program:
7 5 3 8 2
2 3 5 7 8

Nama program: SelectionSort.java

<strong>

</strong>

public class SelectionSort {

public static void main(String[] args) {

int array[] = new int[5];

for(int index=0; index<array.length; index++) {

array[index] = (int) (Math.random()*100);

}

for(int index=0; index<array.length; index++) {

System.out.print(array[index] + ” “);

}

System.out.println();

18

19	int x, y, min;

20	for(x=0; x<array.length; x++) {

21	min = array[x];

22	for(y=x+1; y<array.length; y++) {

23	if(array[y] < array[x]) {

24	min = array[y];

25	int temp = min;

26	array[y] = array[x];

27	array[x] = temp;

28

}

29

}

30

}

31

32	for(int index=0; index<array.length; index++) {

33	System.out.print(array[index] + ” “);

34

}

35	System.out.println();

36

}

37

38

}

Output program:
9 69 96 97 47
9 47 69 96 97
Nama program: InsertionSort.java

01	public class InsertionSort {

02

03	public static void main(String[] args) {

04

05	int array[] = new int[5];

06	array[0] = 7;

07	array[1] = 5;

08	array[2] = 3;

09	array[3] = 8;

10	array[4] = 2;

11

12

int a;

13

int b;

14

15	for(int index=0; index<array.length; index++) {

16	System.out.print(array[index] + ” “);

17

}

18	System.out.println(“”);

19

20	for(a=1; a<array.length; a++)

21

{

22	int temp = array[a];

23

b = a;

24	while(b>0 && array[b-1] >= temp)

25

{

26	array[b] = array[b-1];

27

–b;

28

}

29	array[b] = temp;

30

}

31

32	for(int index=0; index<array.length; index++) {

33	System.out.print(array[index] + ” “);

34

}

35	System.out.println(“”);

36

}

37

}

Output program:
7 5 3 8 2
2 3 5 7 8
SORTING – GUI

Nama program: SortingGui.java

01	import javax.swing.*;

02	import java.awt.*;

03	import java.awt.event.ActionListener;

04	import java.awt.event.ActionEvent;

05

06	public class SortingGui {

07

08	JPanel panelTengah = new JPanel();

09	JPanel panelKanan = new JPanel();

10	JPanel panelBawah = new JPanel();

11	JPanel panelSemua = new JPanel();

12	JTextField[] fieldArray = new JTextField[10];

13	JLabel[] label = new JLabel[10];

14	JTextField sisipElemen = new JTextField(5);

15	JButton buttonSisip = new JButton(“Sisip”);

16	JTextField hapusElemen = new JTextField(5);

17	JButton buttonHapus = new JButton(“Hapus”);

18	JButton buttonLinearSort = new JButton(“Linear Sort”);

19	JButton buttonInsertionSort = new JButton(“Insertion Sort”);

20	JButton buttonBubbleSort = new JButton(“Bubble Sort”);

21

22	SortingGui() {

23	BorderLayout bl = new BorderLayout();

24	panelSemua.setLayout(bl);

25

26	GridLayout gl = new GridLayout(10, 2);

27	panelTengah.setLayout(gl);

28	for (int x = fieldArray.length-1; x >=0; x–) {

29	panelTengah.add(label[x] = new JLabel(Integer.toString(x)));

30	panelTengah.add(fieldArray[x] = new JTextField(5));

31

}

32	panelSemua.add(“Center”, panelTengah);

33

34	GridLayout gl2 = new GridLayout(2, 2);

35	panelKanan.setLayout(gl2);

36	panelKanan.add(sisipElemen);

37	panelKanan.add(buttonSisip);

38	panelKanan.add(hapusElemen);

39	panelKanan.add(buttonHapus);

40	panelSemua.add(“North”, panelKanan);

41

42	GridLayout gl3 = new GridLayout(2, 2);

43	panelBawah.setLayout(gl3);

44	panelBawah.add(buttonLinearSort);

45	panelBawah.add(buttonInsertionSort);

46	panelBawah.add(buttonBubbleSort);

47	panelSemua.add(“South”, panelBawah);

48

49	JFrame jendela = new JFrame(“Sorting GUI”);

50	jendela.setContentPane(panelSemua);

51	//jendela.setSize(200,400);

52	//jendela.setResizable(false);

53	jendela.pack();

54	jendela.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

55	jendela.setVisible(true);

56

57	ProsesSorting proses = new ProsesSorting(this);

58	buttonSisip.addActionListener(proses);

59	buttonHapus.addActionListener(proses);

60	buttonLinearSort.addActionListener(proses);

61	buttonInsertionSort.addActionListener(proses);

62	buttonBubbleSort.addActionListener(proses);

63

}

64

65	public static void main(String[] args) {

66	SortingGui sort = new SortingGui();

67

}

68

}

Nama program: ProsesSorting

001	import java.awt.Color;

002	import javax.swing.JOptionPane;

003	import java.awt.event.*;

004	public class ProsesSorting implements ActionListener {

005

006	SortingGui induk;

007	int array[] = new int[10];

008	int nElemen = 0;

009

010	ProsesSorting(SortingGui induk) {

011	this.induk = induk;

012

}

013

014	public void actionPerformed(ActionEvent kejadian) {

015

016	if(kejadian.getSource() == induk.buttonSisip) {

017	array[nElemen] = Integer.parseInt(induk.sisipElemen.getText());

018	//int sisip = Integer.parseInt(induk.sisipElemen.getText());

019	induk.fieldArray[nElemen].setText(Integer.toString(array[nElemen]));

020	induk.fieldArray[nElemen].setBackground(Color.green);

021	induk.sisipElemen.setText(“”);

022	nElemen++;

023

tampil();

024

}

025	else if(kejadian.getSource() == induk.buttonHapus){

026

int j;

027

028	for(int x=0; x<nElemen; x++) {

029	induk.fieldArray[x].setText(“”);

030

}

031

032	for(j=0; j<nElemen; j++){

033	if( Integer.parseInt(induk.hapusElemen.getText()) == array[j] )

034

break;

035

}

036	if(j==nElemen)

037	JOptionPane.showMessageDialog(null, “tidak ada”);

038

else

039

{

040	for(int k=j; k<nElemen; k++) {

041	array[k] = array[k+1];

042	//nElemen–;

043

}

044

nElemen–;

045	induk.fieldArray[nElemen].setBackground(Color.white);

046

}

047	induk.hapusElemen.setText(“”);

048

tampil();

049	} else if(kejadian.getSource() == induk.buttonLinearSort) {

050	for(int x = 0; x<nElemen-1; x++) {

051	for(int y = x+1; y<nElemen; y++) {

052	if(array[x] > array[y]){

053	int temp = array[x];

054	array[x] = array[y];

055	array[y] = temp;

056

}

057

}

058

}

059

tampil();

060	} else if(kejadian.getSource() == induk.buttonInsertionSort) {

061	int in, out;

062	for(out=1; out<nElemen; out++)

063

{

064	int temp = array[out];

065

in = out;

066	while(in>0 && array[in-1] >= temp)

067

{

068	array[in] = array[in-1];

069

–in;

070

}

071	array[in] = temp;

072

}

073

tampil();

074

075	} else if(kejadian.getSource() == induk.buttonBubbleSort) {

076	for (int x = nElemen-1; x > 1; x–) {

077	for (int y = 0; y < x; y++) {

078	if (array[y] > array[y + 1]) {

079	int temp = array[y];

080	array[y] = array[y + 1];

081	array[y + 1] = temp;

082

}

083

}

084

}

085

tampil();

086

}

087

088

}

089

090	public void tampil(){

091	for(int x=0; x<nElemen; x++) {

092	induk.fieldArray[x].setText(” “);

093

}

094

095	for(int x=0; x<nElemen; x++) {

096	induk.fieldArray[x].setText(Integer.toString(array[x]));

097

}

098

}

099

100

}

Output program:

Elemen array sebelum diurutkan

Elemen array setelah diurutkan

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