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Thread: Nothing will print into the console

  1. #1
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    Default Nothing will print into the console

    Hi, i'm new to java, and i'm trying to make a gaming, but for some reason nothing will print into the console. I want it to have the system to print out the frames, and ticks, but nothing will happen.

    package ca.trey.game;
     
    import java.awt.BorderLayout;
    import java.awt.Canvas;
    import java.awt.Dimension;
     
    import javax.swing.JFrame;
     
    public class Game extends Canvas implements Runnable{
     
    	private static final long serialVersionUID = 1L;
    // Screen Size
    	public static final int WIDTH = 160;
    	public static final int HEIGHT = WIDTH/12*9;
    	public static final int SCALE=3;
    	//Game Name
    	public static final String NAME = "Exploration";
    	//JFrame (Hope It Works!)
     
    	private JFrame frame;
     
    	public boolean running = false;
     
    	public Game(){
    		setMinimumSize(new Dimension(WIDTH * SCALE, HEIGHT * SCALE));
    		setMaximumSize(new Dimension(WIDTH * SCALE, HEIGHT * SCALE));
    		setPreferredSize(new Dimension(WIDTH * SCALE, HEIGHT * SCALE));
     
    		frame = new JFrame(NAME);
     
    		frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    		frame.setLayout(new BorderLayout());
     
    		frame.add(this, BorderLayout.CENTER);
    		frame.pack();
     
    		frame.setResizable(false);
    		frame.setLocationRelativeTo(null);
    		frame.setVisible(true);
     
    	}
    	private synchronized void start() {
    		new Thread(this).start();
    	}
    	private synchronized void stop() {
    		running = false;
    	}
     
    	public void run(){
    		long lastTime = System.nanoTime();
    		double nsPerTick =10000000D/60D;
     
    		int frames = 0;
    		int ticks = 0;
     
    		long lastTimer = System.currentTimeMillis();
    		double delta = 0;
     
    		while(running){
    			long now = System.nanoTime();
    			delta += (now - lastTime) / nsPerTick;
    			lastTime = now;
     
    			while(delta >= 1){
    			ticks++;
    			tick();
    			delta -= 1;
    			}
    	     frames++;
    		render();
     
    		if(System.currentTimeMillis() - lastTimer>= 1000){
    			lastTimer +=1000;
    			System.out.println(frames + ", " + ticks);
    			frames = 0;
    			ticks = 0;
     
    		}
    		}
     
    	}
     
    	public void tick(){
     
     
    	}
     
    		public void render(){
     
    	}
    	public static void main(String[] args){
    	new Game().start();
    }
     
     
     
     
     
    	}


  2. #2
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    Default Re: Nothing will print into the console

    Welcome to the Forum! Thanks for taking the time to learn to post code correctly, and if you haven't already, please read this topic to see other useful info for newcomers.

    A while ( true ) loop is a non-optimal game loop in a Java Swing application. Please investigate more advanced game loops by searching the web for "java game loop" or similar. There are a couple very good tutorials that show several options with explanations why some are better than others.

  3. #3
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    Default Re: Nothing will print into the console

    Quote Originally Posted by GregBrannon View Post
    Welcome to the Forum! Thanks for taking the time to learn to post code correctly, and if you haven't already, please read this topic to see other useful info for newcomers.

    A while ( true ) loop is a non-optimal game loop in a Java Swing application. Please investigate more advanced game loops by searching the web for "java game loop" or similar. There are a couple very good tutorials that show several options with explanations why some are better than others.
    Thanks for the welcome, but I was wondering what I did wrong with the code, that it wont print out the ticks, and frames?

  4. #4
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    Default Re: Nothing will print into the console

    Try changing running to 'true'.

  5. The Following User Says Thank You to GregBrannon For This Useful Post:

    Hurleyboarder (May 7th, 2014)

  6. #5
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    Default Re: Nothing will print into the console

    Quote Originally Posted by GregBrannon View Post
    Try changing running to 'true'.
    Thank you so much! You have really shown me how great this website is. I'll make sure to recommend my class.

  7. #6
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    Default Re: Nothing will print into the console

    Glad to help. Don't forget to look into better game loops.

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