JAVA. Need someone to help me to debug my code? Thank you. Write code fragments

Question

JAVA. Need someone to help me to debug my code? Thank you.

Write code fragments to create a timer object that is fired every 10 seconds. Every 10 seconds, the background color of the window changes to a new random color.

Write the timer-related code that would go in the constructor and the complete listener class.

For full credit, use a timer object of type javax.swing.Timer and a listener class that implements ActionListener.

my code:

import java.awt.*;

import java.awt.event.*;

import java.util.Random;

import javax.swing.*;

public class CountDownGUI extends JFrame {

private Container myCP;

private JTextField counterDisplay;

private Timer timer;

private int counter;

private int initialCount = 10;

private int speed;

public CountDownGUI() {

super("counting Down");

myCP = getContentPane();

JPanel mainPanel = new JPanel();

myCP.add(mainPanel);

setSize(200,200);

Random generator = new Random();

int r = generator.nextInt(256);

int g = generator.nextInt(256);

int b = generator.nextInt(256);

Color randomColor = new Color(r,g,b);

mainPanel.setBackground(randomColor);

setVisible(true);

setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

counterDisplay = new JTextField(20);

counterDisplay.setEditable(false);

myCP.add(counterDisplay);

counter = initialCount;

counterDisplay.setText(Integer.toBinaryString(counter));

speed = 1000;

timer = new Timer(speed, new TimerListener());

timer.restart();

}

private class TimerListener implements ActionListener{

public void actionPerformed(ActionEvent event){

if (counter >0){

counter --;

}else {

counter = initialCount;

CountDownGUI.setBackground(randomColor);

}

counterDisplay.setText(Integer.toString(counter));

}}

public static void main(String[] args){

CountDownGUI frame = new CountDownGUI();

}

}

Explanation / Answer

Hi ,

Please find below the working code: -

Color of output is changing after every 10 seconds. Let me know if you find more problem in this in comments. I'll love to help more...

import java.awt.*;

import java.awt.event.*;

import java.util.Random;

import javax.swing.*;

public class CountDownGUI extends JFrame {

private Container myCP;

private JTextField counterDisplay;

private Timer timer;

private int counter;

private int initialCount = 10;

private int speed;

JPanel mainPanel;

public CountDownGUI() {

super("counting Down");

myCP = getContentPane();

mainPanel = new JPanel();

myCP.add(mainPanel);

setSize(200, 200);

mainPanel.setBackground(getColor());

setVisible(true);

setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

counterDisplay = new JTextField(20);

counterDisplay.setEditable(false);

myCP.add(counterDisplay);

counter = initialCount;

counterDisplay.setText(Integer.toBinaryString(counter));

speed = 1000;

timer = new Timer(speed, new TimerListener());

timer.restart();

}

private class TimerListener implements ActionListener {

public void actionPerformed(ActionEvent event) {

if (counter > 0) {

counter--;

} else {

counter = initialCount;

mainPanel.setBackground(getColor());

}

counterDisplay.setText(Integer.toString(counter));

}

}

public Color getColor() {

Random generator = new Random();

int r = generator.nextInt(256);

int g = generator.nextInt(256);

int b = generator.nextInt(256);

Color randomColor = new Color(r, g, b);

return randomColor;

}

public static void main(String[] args) {

CountDownGUI frame = new CountDownGUI();

}

}

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