GUI ComboBox 1

import javax.swing.*;

import java.awt.*;

import java.awt.event.*;

import java.util.*;

class ComboSample extends JFrame implements ActionListener

{

private static final int boxW = 800;

private static final int boxH = 450;

private static final int box_X_o = 180;

private static final int box_Y_o = 200;

private JButton cancelButton;

private JButton confirmButton;

private JComboBox jumpStudent;

public ComboSample()

{

setTitle ("Combo sample that can be moved");

setSize (boxW ,boxH);

setLocation (box_X_o , box_Y_o);

setDefaultCloseOperation(EXIT_ON_CLOSE);

Container contentPane = getContentPane();

contentPane.setBackground(Color.white);

contentPane.setLayout(null);

//---JComboBox---

String[] studentNamesVector = {"a", "b", "c"};

jumpStudent = new JComboBox(studentNamesVector);

jumpStudent.setBounds(100, 100, 100, 30);

jumpStudent.addActionListener(this);

contentPane.add(jumpStudent);

addToComboBox(); //Add student names to the vector and to the JComboBox

confirmButton = new JButton("Confirm");

confirmButton.setBounds(610, 375, 80, 30);

contentPane.add(confirmButton);

confirmButton.addActionListener(this);

cancelButton = new JButton("Cancel");

cancelButton.setBounds(695, 375, 80, 30);

contentPane.add(cancelButton);

cancelButton.addActionListener(this);

setDefaultCloseOperation(EXIT_ON_CLOSE);

}

public void actionPerformed(ActionEvent event)

{

if (event.getSource() instanceof JButton)

{

JButton clickedButton = (JButton) event.getSource();

String buttonText = clickedButton.getText();

String dedicationsRaw;

if (buttonText == "Confirm")

{

JOptionPane.showMessageDialog(null, "Nothing to do yet");

}

if (buttonText == "Cancel")

{

this.setVisible(false);

}

}

if(event.getSource() instanceof JComboBox)

{

JComboBox cb = (JComboBox) event.getSource();

String s = (String) cb.getSelectedItem();

JOptionPane.showMessageDialog(null, "You picked " + s );

}

}

public void addToComboBox()

{

}

public static void main(String[] args)

{

ComboSample frame = new ComboSample();

frame.setVisible(true);

}

}