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Thread: New paint method? Please help?

  1. #1
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    Default New paint method? Please help?

    Hi guys. So i create little program. So window is in full screen. But i need help with paint method. I think I this method not understeand fully. So code:
     
    package Test;
    import java.awt.*;
    import java.awt.event.KeyEvent;
    import java.awt.event.KeyListener;
    import javax.swing.*;
    import java.util.Random;
    public class Main extends JFrame {
    Graphics g;
    	public static void main(String[]args) {
     
    		DisplayMode dm = new DisplayMode(800,600,16,DisplayMode.REFRESH_RATE_UNKNOWN);
     
    		Main main = new Main();
     
    		main.run(dm);
     
     
    }
     
    	public Main() {
    		addKeyListener(new KeysListener());
    	}
     
     
    	public void run(DisplayMode dm) {
    		setBackground(Color.black);
    		setForeground(Color.pink);
    		setFont(new Font("Arial",Font.BOLD,40));
     
    		Screen s = new Screen();
     
    		try {
    			s.setFullScreenWindow(dm, this);
    			try {
    			Thread.sleep(30000);
    			}catch(Exception e) {
     
    			}
    		}finally{
    			s.restoreWindow();
    		}
     
     
    	}
     
    	public void paint(Graphics g) {
     
    		g.fillRect(300, 300, 250, 40);
    	}
     
    	public void repaint() {
    		Random rand = new Random(400);
    		g.setColor(Color.RED);
    		g.fillRect(rand.nextInt(), rand.nextInt(), 200, 50);
    		System.out.println("ADSdas");
    	}
     
     
     
    	public class KeysListener implements KeyListener {
    		Graphics g2 = null;
     
    		public void keyPressed(KeyEvent e) {
    		int s = e.getKeyCode();
    			if(s ==e.VK_O) {
    				System.exit(0);
    			}
     
    			if (s == e.VK_Z) {
    			repaint();
    			}
    		}
     
    		@Override
    		public void keyReleased(KeyEvent e) {
     
    		}
     
    		@Override
    		public void keyTyped(KeyEvent arg0) {
    			// TODO Auto-generated method stub
     
    		}
    	}
     
     
    }


    So, paint method works perfectly. He paint rectangle. Good. But I dont know how using ,,paint2'' method. I need when you press z button, ,,paint2'' method draw Oval in random cordination. So instead ,,paint2'' method i using repaint() but i dont know nothing about paint methods and so on. So you can tell me how using ,,paint2'' method? Thanks.. Now when i run program, i get a lot of error..

    Thanks for help..
    P.S i thought about new object Graphics g2...


  2. #2
    Member andbin's Avatar
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    Default Re: New paint method? Please help?

    First, if you want to use the Full-Screen Exclusive Mode API, please, at least follow the official tutorial:
    Lesson: Full-Screen Exclusive Mode API (The Java™ Tutorials > Bonus)

    And second, your code is not appropriate for several conceptual/technical reasons. Just one: it's generally not a good idea to paint directly into a JFrame.

    So please, start from the ground, reading good stuff about this API.
    Andrea, www.andbin.net SCJP 5 (91%) SCWCD 5 (94%)

    Useful links for Java beginners My new project Java Examples on Google Code

  3. The Following User Says Thank You to andbin For This Useful Post:

    xkendzu (March 13th, 2014)

  4. #3
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    Default Re: New paint method? Please help?

    I follow this full screen tutorial by youtube thenewboston. Here Screen class:

    package Test;
    import java.awt.*;
     
    import javax.swing.*;
     
    public class Screen extends JFrame {
     
    	private GraphicsDevice vc;
     
    	public Screen() {
    		GraphicsEnvironment env = GraphicsEnvironment.getLocalGraphicsEnvironment();
    		vc = env.getDefaultScreenDevice();
    	}
     
    	public void setFullScreenWindow(DisplayMode dm, JFrame window) {
     
    		window.setUndecorated(true);
    		window.setResizable(false);
    		vc.setFullScreenWindow(window);
     
    		if (dm != null && vc.isDisplayChangeSupported()) {
    			try {
    				vc.setDisplayMode(dm);
    			}catch(Exception e) {
     
    			}
    		}
     
    	}
     
    	public Window returnWindow() {
    		return vc.getFullScreenWindow();
     
    	}
     
    	public void restoreWindow() {
    		Window w = vc.getFullScreenWindow();
     
    		if (w != null) {
    			w.dispose();
    		}
     
    		vc.setFullScreenWindow(null);
     
    	}
     
     
     
    }

    I think all is good.

    --- Update ---

    I little bit read about this. And this help. Thanks!

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