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Thread: Misterious problem

  1. #1
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    Default Misterious problem

    Hello, I was creating a simple game, and I wanted to test program. But when I press "Run" on eclipse, nothing happens, "Terminate" button is active so I think, that program running. Here is my code:
    import javax.swing.*;
     
    public class MainClass {
     
    	public static void main(String[] args) {
    		JFrame frame = new JFrame("Catch Paulenas");
    		frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    		frame.getContentPane().add(new GameClass());
    		frame.setSize(400,400);
    		frame.setVisible(true);
    	}
     
    }

    import javax.imageio.ImageIO;
    import javax.swing.*;
    import java.awt.*;
    import java.awt.event.ActionEvent;
    import java.awt.event.ActionListener;
    import java.awt.event.MouseEvent;
    import java.awt.event.MouseListener;
    import java.awt.image.BufferedImage;
    import java.io.File;
    import java.io.IOException;
    import java.util.Random;
     
    public class GameClass extends JPanel{
     
    	//Declaring variables
    	private int numberOfHits;
    	private JLabel resultsBar;
    	private BufferedImage target;
    	private int targetX;
    	private int targetY;
    	private Timer timer;
    	private int tryX;
    	private int tryY;
    	private Random rand;
     
    	//Creating constructor, setting everything default
    	public GameClass(){
    		numberOfHits = 0;
    		setLayout(new BorderLayout());
    		setBackground(Color.WHITE);
    		rand = new Random();
    		getReady();
    	}
     
    	//Continue get ready for game
    	private void getReady(){
    		try{
    			target = ImageIO.read(new File("target.jpg"));
    		}catch(IOException e){}
     
    		resultsBar = new JLabel("Number of hits "+ numberOfHits);
    		add(BorderLayout.SOUTH, resultsBar);
    		addMouseListener(new PanelListener());
    		playGame();
    	}
     
    	//Playing game
    	private void playGame(){
    		while(numberOfHits < 20){
    			timer = new Timer(rand.nextInt(2000)+1000, new TimerListener());
    		}
    	}
     
    	public void paintComponent(Graphics g){
    		g.drawImage(target,targetX,targetY,null);
    	}
     
    	//Listener for pressing buttons
    	private class PanelListener implements MouseListener{
     
    		public void mouseClicked(MouseEvent e) {
    			tryY = e.getY();
    			tryX = e.getX();
    			if(tryY == targetY || tryX == targetX){
    				numberOfHits++;
    			}
    		}
    		public void mouseEntered(MouseEvent arg0) {}
    		public void mouseExited(MouseEvent arg0) {}
    		public void mousePressed(MouseEvent arg0) {}
    		public void mouseReleased(MouseEvent arg0) {}
     
    	}
     
    	//Listener for timer
    	private class TimerListener implements ActionListener{
     
    		public void actionPerformed(ActionEvent e) {
    			targetX = rand.nextInt(400)+1;
    			targetY = rand.nextInt(380)+1;
    			repaint();
    		}
     
    	}
    }

    Maybe you can see where is the problem, because with syntax is everything good, no errors.


  2. #2
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    Default Re: Misterious problem

    In your playGame() method: you loop until numberOfHits is less than 20, but you never increment numberOfHits in the loop, so it will always be less than 20. So, you've got an infinite loop.
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  3. #3
    Super Moderator copeg's Avatar
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    Default Re: Misterious problem

    Add some println's in there to see what is being executed....Hint: see the playGame method...the while loop will continue indefinitely

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