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Java Basic Button Action

    import java.applet.*;
    import java.awt.*;
    import java.awt.event.*;
 
    public class ClickButton extends Applet implements ActionListener {
	// declare a textfield and Button
	TextField text1;
	Button button1;
 
	// initialize the applet
	public void init() {
		// set the textfield to 30 characters
		text1 = new TextField(30);
 
		// add the textfield to the applet
		add(text1);
 
		// initialize button and set its label
		button1 = new Button("click me");
 
		// add button to the applet
		add(button1);
 
		// set the actionlistener to the button
		button1.addActionListener(this);
	}
 
	// methods needed for actionlistener Interface
	public void actionPerformed(ActionEvent e) {
		// declare and initialize a string to be shown
		String message = "You clicked the button. Woo hoo";
 
		// if the source of the action is the button
		// ie if the button is clicked
		if (e.getSource() == button1) {
			// set the text of the textfield to our message
			text1.setText(message);
		}
	}
    }

And here is the html code to run it, just as a reminder.

<html>
<body>
<applet code="ClickButton.class" width="300" height="300">
</applet>
</body>
</html>