Samet Kilictas's Blog » Java

Example Code #2 – JOptionPane JCombobox

Samet Kilictas — Sun, 21 Dec 2008 13:39:19 +0000

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" };

		String value = (String)JOptionPane.showInputDialog(
				null,
				"What is your favourt day?",
				"Which day?",
				JOptionPane.QUESTION_MESSAGE,
				null, // Use default icon
				smallList,
				smallList[smallList.length-1]);

		JOptionPane.showMessageDialog(null,
				"Your favourit Day: " + value);

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

}

Example Code #1 – JOptionPane and ArrayList

Samet Kilictas — Sat, 20 Dec 2008 13:39:18 +0000

Here this class takes some values using JOptionPane.showInputDialog and shows them to the user using foreach loop

import java.util.ArrayList;
import javax.swing.JOptionPane;

public class Confirm {

ArrayList fruits = new ArrayList();

Confirm(){
String value = "";
while (true){
value = JOptionPane.showInputDialog("Which fruit to Add?");

if (!value.equals("") )
{
fruits.add(value);
}
else
break;

}

for (String s : fruits) {
int n = JOptionPane.showConfirmDialog
(null,
s,
"Apple list",
JOptionPane.YES_NO_OPTION);

System.out.println("n value:" + n);

if (n == JOptionPane.YES_OPTION)
continue;
else if (n == JOptionPane.NO_OPTION)
break;
else if (n == JOptionPane.CLOSED_OPTION)
JOptionPane.showMessageDialog(null, "you clicked to close");
}
}

public static void main(String[] args) {

new Confirm();

}

}

Java ActionListener Tutorial

Samet Kilictas — Thu, 06 Nov 2008 08:47:18 +0000

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();

}

}

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

import javax.swing.JOptionPane;

/**
* BtnsListener.java
*/

class BtnsListener implements ActionListener{

String value = "";
public BtnsListener(String pVal){
value = pVal;
}

@Override
public void actionPerformed(ActionEvent e) {
JOptionPane.showMessageDialog(null, value);
}
}

Java JCombobox Tutorial

Samet Kilictas — Thu, 06 Nov 2008 08:20:41 +0000

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();
}

public static void main(String[] args) {
tut1 window = new tut1();
window.setVisible(true);

}