Samet Kilictas’s Blog

This code shows how to add ComboBox property to JOptionPane.showInputDialog. And the class is able to take an input from this combobox

import javax.swing.JOptionPane;

public class Options {

	public Options() {

		String smallList[] = {"Sunday", "Monday", "Tuesday", "Wednesday",
				"Thrusday", "Friday", "Saturday" };

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This tutorial has two classes. ActionListener and Main class are seperated from each other.

• ParamListener.java
• BtnsListener.java

import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JPanel;
/**
* ParamListener.java
*/
public class ParamListener extends JFrame{
public ParamListener() {
JButton btn10 = new JButton("10");
JButton btn20 = new JButton("20");
JButton btn30 = new JButton("30");
JButton btn40 = new JButton("40");

btn10.addActionListener( new BtnsListener ("ten"));
btn20.addActionListener( new BtnsListener ("twenty"));
btn30.addActionListener( new BtnsListener ("thirty"));
btn40.addActionListener( new BtnsListener ("fourty"));

JPanel content = new JPanel();
content.add(btn10);
content.add(btn20);
content.add(btn30);
content.add(btn40);

setContentPane(content);
setTitle("A Tutorial");
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
setVisible(true);
pack();
}

public static void main(String[] args) {
new ParamListener();

}

}

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This tiny program lets you to choose background color of your pane.

import java.awt.Color;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;

import javax.swing.JComboBox;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;

public class tut1 extends JFrame{

Color[] colors = {
Color.RED, Color.BLUE, Color.YELLOW, Color.BLACK, Color.ORANGE,
new Color(0,143,222)
};

String[] renk = {
"red", "blue", "yellow", "black", "orange", "turkuaz"
};

public JComboBox cmb = new JComboBox(renk);
public JPanel main = new JPanel();

public tut1() {

cmb.addActionListener(
new ActionListener(){
public void actionPerformed(ActionEvent e){
int index = cmb.getSelectedIndex();
main.setBackground(colors[index]);
}
});
cmb.setBackground(Color.blue);

JLabel lbl = new JLabel();
main.add(cmb);
main.add(lbl);
setContentPane(main);
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
setSize(300,300);
setTitle("my title");
pack();
}

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