Artikel kali ini yaitu contoh program tentang java Lampu Lalu Lintas...
Berikut Listing Programnya.
Simpan dengan MainFrame.java.
package Latihan.Blog;
import java.awt.Color;
import java.awt.Cursor;
public class MainFrame extends javax.swing.JFrame {
int a =2; //pesan variable a
/** Creates new form MainFrame */
public MainFrame() {
initComponents(); //memasang atau mengompile objek-objek
}
//bagian ini tidak dapat di ubah
/** This method is called from within the constructor to
* initialize the form.
* WARNING: Do NOT modify this code. The content of this method is
* always regenerated by the Form Editor.
*/
@SuppressWarnings("unchecked")
// <editor-fold defaultstate="collapsed" desc="Generated Code">//GEN-BEGIN:initComponents
private void initComponents() {
jPanel1 = new javax.swing.JPanel();
jLabel1 = new javax.swing.JLabel();
pMerah = new javax.swing.JPanel();
pHijau = new javax.swing.JPanel();
pKuning = new javax.swing.JPanel();
rbStop = new javax.swing.JRadioButton();
rbHati2 = new javax.swing.JRadioButton();
rbGo = new javax.swing.JRadioButton();
bGanti = new javax.swing.JButton();
setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);
jPanel1.setBackground(new java.awt.Color(0, 255, 255));
jPanel1.setForeground(new java.awt.Color(255, 153, 204));
jPanel1.setFont(new java.awt.Font("Ravie", 1, 24)); // NOI18N
jLabel1.setFont(new java.awt.Font("Ravie", 1, 24)); // NOI18N
jLabel1.setForeground(new java.awt.Color(0, 14, 237));
jLabel1.setHorizontalAlignment(javax.swing.SwingConstants.CENTER);
jLabel1.setText("LAMPU LALU LINTAS");
pMerah.setBackground(new java.awt.Color(255, 0, 0));
javax.swing.GroupLayout pMerahLayout = new javax.swing.GroupLayout(pMerah);
pMerah.setLayout(pMerahLayout);
pMerahLayout.setHorizontalGroup(
pMerahLayout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGap(0, 59, Short.MAX_VALUE)
);
pMerahLayout.setVerticalGroup(
pMerahLayout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGap(0, 57, Short.MAX_VALUE)
);
pHijau.setBackground(new java.awt.Color(0, 255, 0));
javax.swing.GroupLayout pHijauLayout = new javax.swing.GroupLayout(pHijau);
pHijau.setLayout(pHijauLayout);
pHijauLayout.setHorizontalGroup(
pHijauLayout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGap(0, 59, Short.MAX_VALUE)
);
pHijauLayout.setVerticalGroup(
pHijauLayout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGap(0, 57, Short.MAX_VALUE)
);
pKuning.setBackground(new java.awt.Color(255, 255, 0));
javax.swing.GroupLayout pKuningLayout = new javax.swing.GroupLayout(pKuning);
pKuning.setLayout(pKuningLayout);
pKuningLayout.setHorizontalGroup(
pKuningLayout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGap(0, 59, Short.MAX_VALUE)
);
pKuningLayout.setVerticalGroup(
pKuningLayout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGap(0, 57, Short.MAX_VALUE)
);
rbStop.setBackground(new java.awt.Color(212, 208, 200));
rbStop.setFont(new java.awt.Font("Curlz MT", 1, 14)); // NOI18N
rbStop.setText("BERHENTI");
rbStop.setEnabled(false);
rbHati2.setBackground(new java.awt.Color(212, 208, 200));
rbHati2.setFont(new java.awt.Font("Curlz MT", 1, 14)); // NOI18N
rbHati2.setText("HATI-HATI");
rbHati2.setEnabled(false);
rbGo.setBackground(new java.awt.Color(212, 208, 200));
rbGo.setFont(new java.awt.Font("Curlz MT", 1, 14)); // NOI18N
rbGo.setText("JALAN");
rbGo.setEnabled(false);
bGanti.setFont(new java.awt.Font("Algerian", 1, 24)); // NOI18N
bGanti.setText("GANTI");
bGanti.addMouseListener(new java.awt.event.MouseAdapter() {
public void mouseEntered(java.awt.event.MouseEvent evt) {
bGantiMouseEntered(evt);
}
public void mouseExited(java.awt.event.MouseEvent evt) {
bGantiMouseExited(evt);
}
});
bGanti.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
bGantiActionPerformed(evt);
}
});
javax.swing.GroupLayout jPanel1Layout = new javax.swing.GroupLayout(jPanel1);
jPanel1.setLayout(jPanel1Layout);
jPanel1Layout.setHorizontalGroup(
jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(jPanel1Layout.createSequentialGroup()
.addGap(73, 73, 73)
.addGroup(jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.TRAILING)
.addComponent(pKuning, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
.addComponent(pMerah, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
.addComponent(pHijau, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE))
.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED, 79, Short.MAX_VALUE)
.addGroup(jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(javax.swing.GroupLayout.Alignment.TRAILING, jPanel1Layout.createSequentialGroup()
.addGroup(jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING, false)
.addComponent(rbHati2, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
.addComponent(rbStop, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
.addComponent(rbGo, javax.swing.GroupLayout.Alignment.TRAILING, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE))
.addGap(82, 82, 82))
.addGroup(javax.swing.GroupLayout.Alignment.TRAILING, jPanel1Layout.createSequentialGroup()
.addComponent(bGanti, javax.swing.GroupLayout.PREFERRED_SIZE, 121, javax.swing.GroupLayout.PREFERRED_SIZE)
.addGap(68, 68, 68))))
.addGroup(javax.swing.GroupLayout.Alignment.TRAILING, jPanel1Layout.createSequentialGroup()
.addContainerGap(25, Short.MAX_VALUE)
.addComponent(jLabel1, javax.swing.GroupLayout.PREFERRED_SIZE, 365, javax.swing.GroupLayout.PREFERRED_SIZE)
.addContainerGap())
);
jPanel1Layout.setVerticalGroup(
jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(jPanel1Layout.createSequentialGroup()
.addContainerGap()
.addComponent(jLabel1, javax.swing.GroupLayout.PREFERRED_SIZE, 42, javax.swing.GroupLayout.PREFERRED_SIZE)
.addGap(18, 18, 18)
.addGroup(jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(jPanel1Layout.createSequentialGroup()
.addComponent(pMerah, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
.addGap(18, 18, 18)
.addComponent(pKuning, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE))
.addGroup(jPanel1Layout.createSequentialGroup()
.addComponent(rbStop)
.addGap(27, 27, 27)
.addComponent(rbHati2)
.addGap(18, 18, 18)
.addComponent(rbGo)))
.addGap(18, 18, 18)
.addGroup(jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.TRAILING)
.addComponent(pHijau, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
.addComponent(bGanti))
.addContainerGap(22, Short.MAX_VALUE))
);
javax.swing.GroupLayout layout = new javax.swing.GroupLayout(getContentPane());
getContentPane().setLayout(layout);
layout.setHorizontalGroup(
layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addComponent(jPanel1, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
);
layout.setVerticalGroup(
layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addComponent(jPanel1, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
);
pack();
}// </editor-fold>//GEN-END:initComponents
//yang terjadi ketika tombol ubah ditekan
private void bGantiActionPerformed(java.awt.event.ActionEvent evt) {//GEN-FIRST:event_bGantiActionPerformed
// TODO add your handling code here:
a++; //nilai a terus bertambah satu setiap di tekan
//if conditional, bagian ini mengatur warna lampu dan radio button
if(a%3 == 0){
pMerah.setBackground(Color.GRAY); //set warna
pHijau.setBackground(Color.GREEN);
rbStop.setSelected(false); //seleksi yang tidak aktif
rbGo.setSelected(true); //seleksi yang aktif
}
else if(a%3 == 1){
pHijau.setBackground(Color.GRAY);
pKuning.setBackground(Color.ORANGE);
rbGo.setSelected(false);
rbHati2.setSelected(true);
}
else {
pKuning.setBackground(Color.GRAY);
pMerah.setBackground(Color.RED);
rbHati2.setSelected(false);
rbStop.setSelected(true);
}
}//GEN-LAST:event_bGantiActionPerformed
private void bGantiMouseEntered(java.awt.event.MouseEvent evt) {//GEN-FIRST:event_bGantiMouseEntered
// TODO add your handling code here:
setCursor(Cursor.HAND_CURSOR); //saat kursor masuk area tombol, kursor berubah bentuk
}//GEN-LAST:event_bGantiMouseEntered
private void bGantiMouseExited(java.awt.event.MouseEvent evt) {//GEN-FIRST:event_bGantiMouseExited
// TODO add your handling code here:
setCursor(Cursor.DEFAULT_CURSOR); //saat kursor kelua area tombol, kursor kembali seperti semula
}//GEN-LAST:event_bGantiMouseExited
/**
* @param args the command line arguments
*/
public static void main(String args[]) {
/* Set the Nimbus look and feel */
//<editor-fold defaultstate="collapsed" desc=" Look and feel setting code (optional) ">
/* If Nimbus (introduced in Java SE 6) is not available, stay with the default look and feel.
* For details see http://download.oracle.com/javase/tutorial/uiswing/lookandfeel/plaf.html
*/
try {
for (javax.swing.UIManager.LookAndFeelInfo info : javax.swing.UIManager.getInstalledLookAndFeels()) {
if ("Nimbus".equals(info.getName())) {
javax.swing.UIManager.setLookAndFeel(info.getClassName());
break;
}
}
} catch (ClassNotFoundException ex) {
java.util.logging.Logger.getLogger(MainFrame.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
} catch (InstantiationException ex) {
java.util.logging.Logger.getLogger(MainFrame.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
} catch (IllegalAccessException ex) {
java.util.logging.Logger.getLogger(MainFrame.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
} catch (javax.swing.UnsupportedLookAndFeelException ex) {
java.util.logging.Logger.getLogger(MainFrame.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
}
//</editor-fold>
/* Create and display the form */
java.awt.EventQueue.invokeLater(new Runnable() {
@Override
public void run() {
new MainFrame().setVisible(true);
}
});
}
// Variables declaration - do not modify//GEN-BEGIN:variables
private javax.swing.JButton bGanti;
private javax.swing.JLabel jLabel1;
private javax.swing.JPanel jPanel1;
private javax.swing.JPanel pHijau;
private javax.swing.JPanel pKuning;
private javax.swing.JPanel pMerah;
private javax.swing.JRadioButton rbGo;
private javax.swing.JRadioButton rbHati2;
private javax.swing.JRadioButton rbStop;
// End of variables declaration//GEN-END:variables
}
Output:
Berikut Listing Programnya.
Simpan dengan MainFrame.java.
package Latihan.Blog;
import java.awt.Color;
import java.awt.Cursor;
public class MainFrame extends javax.swing.JFrame {
int a =2; //pesan variable a
/** Creates new form MainFrame */
public MainFrame() {
initComponents(); //memasang atau mengompile objek-objek
}
//bagian ini tidak dapat di ubah
/** This method is called from within the constructor to
* initialize the form.
* WARNING: Do NOT modify this code. The content of this method is
* always regenerated by the Form Editor.
*/
@SuppressWarnings("unchecked")
// <editor-fold defaultstate="collapsed" desc="Generated Code">//GEN-BEGIN:initComponents
private void initComponents() {
jPanel1 = new javax.swing.JPanel();
jLabel1 = new javax.swing.JLabel();
pMerah = new javax.swing.JPanel();
pHijau = new javax.swing.JPanel();
pKuning = new javax.swing.JPanel();
rbStop = new javax.swing.JRadioButton();
rbHati2 = new javax.swing.JRadioButton();
rbGo = new javax.swing.JRadioButton();
bGanti = new javax.swing.JButton();
setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);
jPanel1.setBackground(new java.awt.Color(0, 255, 255));
jPanel1.setForeground(new java.awt.Color(255, 153, 204));
jPanel1.setFont(new java.awt.Font("Ravie", 1, 24)); // NOI18N
jLabel1.setFont(new java.awt.Font("Ravie", 1, 24)); // NOI18N
jLabel1.setForeground(new java.awt.Color(0, 14, 237));
jLabel1.setHorizontalAlignment(javax.swing.SwingConstants.CENTER);
jLabel1.setText("LAMPU LALU LINTAS");
pMerah.setBackground(new java.awt.Color(255, 0, 0));
javax.swing.GroupLayout pMerahLayout = new javax.swing.GroupLayout(pMerah);
pMerah.setLayout(pMerahLayout);
pMerahLayout.setHorizontalGroup(
pMerahLayout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGap(0, 59, Short.MAX_VALUE)
);
pMerahLayout.setVerticalGroup(
pMerahLayout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGap(0, 57, Short.MAX_VALUE)
);
pHijau.setBackground(new java.awt.Color(0, 255, 0));
javax.swing.GroupLayout pHijauLayout = new javax.swing.GroupLayout(pHijau);
pHijau.setLayout(pHijauLayout);
pHijauLayout.setHorizontalGroup(
pHijauLayout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGap(0, 59, Short.MAX_VALUE)
);
pHijauLayout.setVerticalGroup(
pHijauLayout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGap(0, 57, Short.MAX_VALUE)
);
pKuning.setBackground(new java.awt.Color(255, 255, 0));
javax.swing.GroupLayout pKuningLayout = new javax.swing.GroupLayout(pKuning);
pKuning.setLayout(pKuningLayout);
pKuningLayout.setHorizontalGroup(
pKuningLayout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGap(0, 59, Short.MAX_VALUE)
);
pKuningLayout.setVerticalGroup(
pKuningLayout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGap(0, 57, Short.MAX_VALUE)
);
rbStop.setBackground(new java.awt.Color(212, 208, 200));
rbStop.setFont(new java.awt.Font("Curlz MT", 1, 14)); // NOI18N
rbStop.setText("BERHENTI");
rbStop.setEnabled(false);
rbHati2.setBackground(new java.awt.Color(212, 208, 200));
rbHati2.setFont(new java.awt.Font("Curlz MT", 1, 14)); // NOI18N
rbHati2.setText("HATI-HATI");
rbHati2.setEnabled(false);
rbGo.setBackground(new java.awt.Color(212, 208, 200));
rbGo.setFont(new java.awt.Font("Curlz MT", 1, 14)); // NOI18N
rbGo.setText("JALAN");
rbGo.setEnabled(false);
bGanti.setFont(new java.awt.Font("Algerian", 1, 24)); // NOI18N
bGanti.setText("GANTI");
bGanti.addMouseListener(new java.awt.event.MouseAdapter() {
public void mouseEntered(java.awt.event.MouseEvent evt) {
bGantiMouseEntered(evt);
}
public void mouseExited(java.awt.event.MouseEvent evt) {
bGantiMouseExited(evt);
}
});
bGanti.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
bGantiActionPerformed(evt);
}
});
javax.swing.GroupLayout jPanel1Layout = new javax.swing.GroupLayout(jPanel1);
jPanel1.setLayout(jPanel1Layout);
jPanel1Layout.setHorizontalGroup(
jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(jPanel1Layout.createSequentialGroup()
.addGap(73, 73, 73)
.addGroup(jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.TRAILING)
.addComponent(pKuning, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
.addComponent(pMerah, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
.addComponent(pHijau, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE))
.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED, 79, Short.MAX_VALUE)
.addGroup(jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(javax.swing.GroupLayout.Alignment.TRAILING, jPanel1Layout.createSequentialGroup()
.addGroup(jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING, false)
.addComponent(rbHati2, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
.addComponent(rbStop, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
.addComponent(rbGo, javax.swing.GroupLayout.Alignment.TRAILING, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE))
.addGap(82, 82, 82))
.addGroup(javax.swing.GroupLayout.Alignment.TRAILING, jPanel1Layout.createSequentialGroup()
.addComponent(bGanti, javax.swing.GroupLayout.PREFERRED_SIZE, 121, javax.swing.GroupLayout.PREFERRED_SIZE)
.addGap(68, 68, 68))))
.addGroup(javax.swing.GroupLayout.Alignment.TRAILING, jPanel1Layout.createSequentialGroup()
.addContainerGap(25, Short.MAX_VALUE)
.addComponent(jLabel1, javax.swing.GroupLayout.PREFERRED_SIZE, 365, javax.swing.GroupLayout.PREFERRED_SIZE)
.addContainerGap())
);
jPanel1Layout.setVerticalGroup(
jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(jPanel1Layout.createSequentialGroup()
.addContainerGap()
.addComponent(jLabel1, javax.swing.GroupLayout.PREFERRED_SIZE, 42, javax.swing.GroupLayout.PREFERRED_SIZE)
.addGap(18, 18, 18)
.addGroup(jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(jPanel1Layout.createSequentialGroup()
.addComponent(pMerah, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
.addGap(18, 18, 18)
.addComponent(pKuning, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE))
.addGroup(jPanel1Layout.createSequentialGroup()
.addComponent(rbStop)
.addGap(27, 27, 27)
.addComponent(rbHati2)
.addGap(18, 18, 18)
.addComponent(rbGo)))
.addGap(18, 18, 18)
.addGroup(jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.TRAILING)
.addComponent(pHijau, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
.addComponent(bGanti))
.addContainerGap(22, Short.MAX_VALUE))
);
javax.swing.GroupLayout layout = new javax.swing.GroupLayout(getContentPane());
getContentPane().setLayout(layout);
layout.setHorizontalGroup(
layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addComponent(jPanel1, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
);
layout.setVerticalGroup(
layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addComponent(jPanel1, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
);
pack();
}// </editor-fold>//GEN-END:initComponents
//yang terjadi ketika tombol ubah ditekan
private void bGantiActionPerformed(java.awt.event.ActionEvent evt) {//GEN-FIRST:event_bGantiActionPerformed
// TODO add your handling code here:
a++; //nilai a terus bertambah satu setiap di tekan
//if conditional, bagian ini mengatur warna lampu dan radio button
if(a%3 == 0){
pMerah.setBackground(Color.GRAY); //set warna
pHijau.setBackground(Color.GREEN);
rbStop.setSelected(false); //seleksi yang tidak aktif
rbGo.setSelected(true); //seleksi yang aktif
}
else if(a%3 == 1){
pHijau.setBackground(Color.GRAY);
pKuning.setBackground(Color.ORANGE);
rbGo.setSelected(false);
rbHati2.setSelected(true);
}
else {
pKuning.setBackground(Color.GRAY);
pMerah.setBackground(Color.RED);
rbHati2.setSelected(false);
rbStop.setSelected(true);
}
}//GEN-LAST:event_bGantiActionPerformed
private void bGantiMouseEntered(java.awt.event.MouseEvent evt) {//GEN-FIRST:event_bGantiMouseEntered
// TODO add your handling code here:
setCursor(Cursor.HAND_CURSOR); //saat kursor masuk area tombol, kursor berubah bentuk
}//GEN-LAST:event_bGantiMouseEntered
private void bGantiMouseExited(java.awt.event.MouseEvent evt) {//GEN-FIRST:event_bGantiMouseExited
// TODO add your handling code here:
setCursor(Cursor.DEFAULT_CURSOR); //saat kursor kelua area tombol, kursor kembali seperti semula
}//GEN-LAST:event_bGantiMouseExited
/**
* @param args the command line arguments
*/
public static void main(String args[]) {
/* Set the Nimbus look and feel */
//<editor-fold defaultstate="collapsed" desc=" Look and feel setting code (optional) ">
/* If Nimbus (introduced in Java SE 6) is not available, stay with the default look and feel.
* For details see http://download.oracle.com/javase/tutorial/uiswing/lookandfeel/plaf.html
*/
try {
for (javax.swing.UIManager.LookAndFeelInfo info : javax.swing.UIManager.getInstalledLookAndFeels()) {
if ("Nimbus".equals(info.getName())) {
javax.swing.UIManager.setLookAndFeel(info.getClassName());
break;
}
}
} catch (ClassNotFoundException ex) {
java.util.logging.Logger.getLogger(MainFrame.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
} catch (InstantiationException ex) {
java.util.logging.Logger.getLogger(MainFrame.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
} catch (IllegalAccessException ex) {
java.util.logging.Logger.getLogger(MainFrame.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
} catch (javax.swing.UnsupportedLookAndFeelException ex) {
java.util.logging.Logger.getLogger(MainFrame.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
}
//</editor-fold>
/* Create and display the form */
java.awt.EventQueue.invokeLater(new Runnable() {
@Override
public void run() {
new MainFrame().setVisible(true);
}
});
}
// Variables declaration - do not modify//GEN-BEGIN:variables
private javax.swing.JButton bGanti;
private javax.swing.JLabel jLabel1;
private javax.swing.JPanel jPanel1;
private javax.swing.JPanel pHijau;
private javax.swing.JPanel pKuning;
private javax.swing.JPanel pMerah;
private javax.swing.JRadioButton rbGo;
private javax.swing.JRadioButton rbHati2;
private javax.swing.JRadioButton rbStop;
// End of variables declaration//GEN-END:variables
}
Output:
Klo mau download Program Netbeansnya sillahkan klik disini "Download Program Netbeans"
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