Thread: Help with my GUI

Hi guys, im new to GUI in Java and to this website. Ive self taught myself Java so far, I would consider myself knowing the basics of Java and I am ready to learn more advanced things in java.
Im currently making this Java GUI game which has a simple concept; the user clicks on the the screen when the small circle is in the center of the big circle and gains a point. I made a black circle by 100x100 and a white circle 50x50. This my code so far:
GUI

        import java.awt.Color;
import java.awt.Graphics;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.MouseEvent;
import java.awt.event.MouseListener;
import java.io.IOException;
import java.util.Random;
 
import javax.swing.JButton;
import javax.swing.JOptionPane;
import javax.swing.Timer;
import javax.swing.JPanel;
        public class gui extends JPanel implements ActionListener, MouseListener {
 
	static final int permanentposx = 75;
	static final int permanentposy = 75;
	int posy = 75;
	int posx = 75;
	int score;
	Timer t = new Timer(500, this);
 
	public gui() {
		t.start();
	}
 
	public void paintComponent(Graphics g) {
		super.paintComponent(g);
		g.setColor(Color.black);
		g.fillOval(50, 50, 100, 100);
		g.setColor(Color.WHITE);
		g.fillOval(posx, posy, 50, 50);
 
	}
 
	public void actionPerformed(ActionEvent e) {
posy = permanentposy;
		posx = permanentposx;		
boolean checkifmoved = false;
		int x;
		Random rnd = new Random();
		x = rnd.nextInt(999);
 
		if (x % 3 == 0) {
			posy = posy - 25;
			posx = permanentposx;
			checkifmoved = true;
 
		} else if (x % 27 == 0) {
			posy = posy + 25;
			posx = permanentposx;
			checkifmoved = true;
		} else if (x % 13 == 0) {
			posx = posx + 25;
			posy = permanentposy;
			checkifmoved = true;
		} else  {
			posx = posx - 25;
			posy = permanentposy;
			checkifmoved = true;
 
		}
 
		this.repaint();
 
		if (checkifmoved == true) {
			int y;
			y = rnd.nextInt(10);
			if(y % 3 == 0){
			posy = permanentposy;
			posx = permanentposx;
			checkifmoved = false;
			}
		this.repaint();
 
	}
 
}
 
	@Override
	public void mouseClicked(MouseEvent ee) {
 
 
	}

MAIN

import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
 
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JOptionPane;
import javax.swing.JPanel;
public class main {
 
	public static void main(String[] args) {
		JFrame frame = new JFrame("Circle enlarger");
		frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
		frame.setSize(400,400);
		frame.setVisible(true);
 
		gui guiobject = new gui();
		frame.add(guiobject);
 
 
 
	}
}

As you can see, on my actionlistener method in my GUI class, I tried making the circle move up,down,left or right randomly by creating a random number and dividing that by a certain number. The problem im currently having is that I dont really know how code the part where the computer knows when the user has clicked and when the small circle is in the center of the black circle...
Ive tried implementing mouselistener but dont know which statement to use. I was thinking of MOUSE_CLICKED but that didnt work out right...

that didnt work out right.

Please explain what happened and what the problem was. Post any printn debug output that shows what you are talking about.


NOTE: The posted code needs import statements to be able to compile.

I need to be able to compile the code to test it. I can not compile without the import statements.

that didnt work out right

Please explain what happened and what the problem was. Post any printn debug output that shows what you are talking about.

Ok, that gets rid of some compiler errors. There is still a compiler error in the code that needs to be fixed before it can be executed.

I need help writing the mouselistener codes.

Can you describe in detail what the listener needs to do?

Ok, this time the MouseListener methods are there.
Now what about this part:

I need help writing the mouselistener codes.

Can you describe in detail what the listener needs to do?

Ok, how is the listener going to do that? Make a detailed list of the steps the listener needs to take to do that.

For testing add some println statements to print a message when the mouse is clicked and to show the location of the click.
Also print out a message if the small circle is in the center of the big circle so you can see when the two events happen.

printing of the score onto the screen

The Graphics class's drawString() method will write a String.

Glad you got it working.