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javaswingawtjapplet

Assistance please! Need applet proofreading

I really cannot figure out what I'm doing wrong- The Option1 code just shows a white empty text field and Option 2 just says it's not initialized... I could really use some guidance. Thanks in advance

import java.awt.*;
import javax.swing.*;
import java.awt.event.*;

public class Option1 extends JApplet implements ActionListener {

private int click = 0;

public Option1() {
JFrame base = new JFrame ("Button Click Counter");
base.getContentPane().setLayout(null);
base.setSize(500,500);
base.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

JButton button = new JButton("Click Me!");
button.addActionListener(this);
JTextField count = new JTextField(click);
    this.add(button);
    this.add(count);
}
@Override
public void actionPerformed (ActionEvent e) {
        click++; }

    }

and the other one

import java.awt.*;
import javax.swing.*;
import java.awt.event.*;
import java.util.Random;

public class Option2 extends JApplet implements MouseListener {
double x;
double y;
public void init() {
addMouseListener(this);


JFrame base = new JFrame("Mouse Coordinates");
base.getContentPane().setLayout(null);
base.setSize(500,500);
base.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);


JTextField answer = new JTextField(x + "," + y);
}
@Override    
public void mouseClicked( MouseEvent e ) {
    x = e.getX();
    y = e.getY();

    this.setBackground(new Color((int)(Math.random() * 0x1000000)));
}
public void mouseEntered(MouseEvent e){}
public void mouseExited(MouseEvent e){}
public void mousePressed(MouseEvent e){}
public void mouseReleased(MouseEvent e){}
}

also, if anyone could offer advice on how to a mouseclick to change the background to a random color (as attempted in Option2), that'd be great. Thanks!

Solution

  • In Option1

    JApplet by default use BorderLayout and you can add just one component in each section north, south, east, west and center. If you add another component in same section then previous component will be replaced by newly added one.

    Use overloaded add() method to add it in different section.

    for example:

    this.add(button, BorderLayout.SOUTH);
this.add(count); // added in CENTER by default

    It's better to use JPanel. Add components in it and finally add JPanel in JApplet.

    Read more about How to Use BorderLayout

    In Option2