In this tutorial how to create a Frame with JPanel Class and Handle an Event using ActionListener Interface in Core Java is shown.<\/p>\n[themify_quote]\n
Code:<\/p>\n
ButtonSettingBackground.java<\/p>\n
import java.awt.Color;
\nimport java.awt.Container;
\nimport java.awt.event.ActionEvent;
\nimport java.awt.event.ActionListener;
\nimport java.awt.event.WindowAdapter;
\nimport java.awt.event.WindowEvent;<\/p>\n
import javax.swing.JButton;
\nimport javax.swing.JFrame;
\nimport javax.swing.JPanel;<\/p>\n
public class ButtonSettingBackground extends JPanel implements ActionListener
\n{
\nprivate JButton greenButton = new JButton(“Green”);
\nprivate JButton blueButton = new JButton(“Blue”);
\nprivate JButton redButton = new JButton(“Red”);<\/p>\n
public ButtonSettingBackground()
\n{
\nadd(greenButton);
\nadd(blueButton);
\nadd(redButton);<\/p>\n
greenButton.addActionListener(this);
\nblueButton.addActionListener(this);
\nredButton.addActionListener(this);
\n}<\/p>\n
public void actionPerformed(ActionEvent e)
\n{
\nObject source = e.getSource();
\nColor color = getBackground();<\/p>\n
if(source == greenButton)
\ncolor = Color.green;
\nelse if(source == blueButton)
\ncolor = Color.blue;
\nelse if(source == redButton)
\ncolor = Color.red;<\/p>\n
setBackground(color);
\nrepaint();
\n}<\/p>\n
public static void main(String args[])
\n{
\nJFrame frame = new JFrame(“ButtonTest”);
\nframe.setSize(300,200);<\/p>\n
frame.addWindowListener(new WindowAdapter()
\n{
\npublic void windowClosing(WindowEvent e)
\n{
\nSystem.exit(0);
\n}
\n});<\/p>\n
Container contentPane = frame.getContentPane();
\ncontentPane.add(new ButtonSettingBackground());<\/p>\n
frame.show();
\n}
\n}<\/p>\n[\/themify_quote]\n