Event Handling

Event Handling

A.INPUT

import java.awt.*;

import javax.swing.*;

import java.awt.event.*;

class ButtonHandling extends JFrame implements ActionListener {

private JLabel lbl;

private JButton btnSetuju;

private JButton btnBatal;

public ButtonHandling() {

super("Coba Button Handling");

lbl = new JLabel("Status : None");

lbl.setHorizontalAlignment(SwingConstants.CENTER);

btnSetuju = new JButton("Setuju");

btnBatal = new JButton("Batal");

btnSetuju.addActionListener(this);

btnBatal.addActionListener(this);

setLayout(new BorderLayout());

add(lbl, "North");

add(btnSetuju, "West");

add(btnBatal, "East");

pack();

setResizable(false);

setLocation(100, 100);

setDefaultCloseOperation(3);

setVisible(true);

}

public void actionPerformed(ActionEvent e) {

if(e.getSource()==btnSetuju) {

lbl.setText("Status = Setuju");

}

if(e.getSource()==btnBatal) {

lbl.setText("Status = Batal");

}

}

}

public class EventButton {

public static void main(String []args) {

new ButtonHandling();

}

}

A.OUTPUT

B.INPUT

import java.awt.*;

import java.awt.event.*;

import javax.swing.*;

class RadioHandling extends JFrame implements ItemListener {

private JTextField teks;

private JPanel panel;

private JRadioButton rbTn1, rbTn2, rbTn3 ;

public RadioHandling() {

setTitle("Coba RadioButton Handling");

teks = new JTextField("Jenis Kelamin : Pilihan");

teks.setHorizontalAlignment(SwingConstants.CENTER);

panel = new JPanel(new FlowLayout());

rbTn1 = new JRadioButton("Pria");

rbTn2 = new JRadioButton("Wanita");

rbTn3 = new JRadioButton("??");

ButtonGroup group = new ButtonGroup();

group.add(rbTn1);

group.add(rbTn2);

group.add(rbTn3);

rbTn1.addItemListener(this);

rbTn2.addItemListener(this);

rbTn3.addItemListener(this);

setLayout(new BorderLayout());

add(teks, "North");

add(panel, "West");

panel.add(rbTn1);

panel.add(rbTn2);

panel.add(rbTn3);

pack();

setVisible(true);

setLocation(200,200);

setDefaultCloseOperation(EXIT_ON_CLOSE);

}

public void itemStateChanged(ItemEvent event) {

if(event.getSource()==rbTn1) {

if(event.getStateChange()==ItemEvent.SELECTED)

teks.setText("Jenis Kelamin : Pria");

}

if(event.getSource()==rbTn2) {

if(event.getStateChange()==ItemEvent.SELECTED)

teks.setText("Jenis Kelamin : Wanita");

}

if(event.getSource()==rbTn3) {

if(event.getStateChange()==ItemEvent.SELECTED)

teks.setText("Jenis Kelamin : ??");

}

}

}

public class EventRadio {

public static void main(String []args) {

new RadioHandling();

}

}

B.OUTPUT

     

C.INPUT

import java.awt.*;

import java.awt.event.*;

import javax.swing.*;

class ComboBoxHandling extends JFrame implements ItemListener {

private JTextField teks;

private String Status[] = {"Setuju", "Batal"};

private JComboBox cbStatus;

public ComboBoxHandling() {

super("Coba Combo Box Handling");

teks = new JTextField("Status : None");

teks.setHorizontalAlignment(SwingConstants.CENTER);

cbStatus = new JComboBox(Status);

cbStatus.addItemListener(this);

setLayout(new BorderLayout());

add(teks, "North");

add(cbStatus, "South");

pack();

setVisible(true);

setDefaultCloseOperation(EXIT_ON_CLOSE);

}

public void itemStateChanged(ItemEvent event) {

if(event.getStateChange()==ItemEvent.SELECTED)

if(cbStatus.getSelectedIndex()==0);

teks.setText("Setuju");

if(cbStatus.getSelectedIndex()==1)

teks.setText("Batal");

}

}

public class EventComboBox {

public static void main(String []args) {

new ComboBoxHandling();

}

}

C.OUTPUT