Main.java

package latihan1;
import java.awt.Color;
import java.awt.Dimension;
import java.awt.EventQueue;
import java.awt.Font;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.Image;
import java.awt.RenderingHints;
import java.awt.Toolkit;

import javax.swing.ImageIcon;
import javax.swing.JFrame;
import javax.swing.JPanel;

public class Main extends JFrame{

    public Main(){
        initUI();
    }
    
    private void initUI(){        
        add(new Canvas());
        setResizable(false);
        pack();        
        setTitle("Computer Graphics Unsulbar");    
        setLocationRelativeTo(null);
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);        
    }

    public static void main(String[] args){        
        EventQueue.invokeLater(new Runnable(){            
            //@Override
            public void run() {                
                JFrame ex = new Main();
                ex.setVisible(true);                
            }
        });
    }
    
    class Canvas extends JPanel implements Runnable {

		private final int CANVAS_WIDTH 			= 600;
		private final int CANVAS_HEIGHT 		= 600;
		private final static int MAX_FPS 		= 50; //desired fps
	    private final static int FRAME_PERIOD 	= 1000 / MAX_FPS; // the frame period
	    private volatile boolean isRunning 		= false;
	    private Thread thread;
		
		//DEKLARASI VARIABEL/ATRIBUT DISINI
		int x=0;
		
		public Canvas() {		
			initializeCanvas();
		}
		
		private void loadImage(){		
		    //LOAD IMAGE DISINI
		}
		
		private void initializeCanvas(){		
		    setBackground(Color.WHITE);
		    setPreferredSize(new Dimension(CANVAS_WIDTH, CANVAS_HEIGHT));
		    setDoubleBuffered(true);	
		}
		
		//@Override
		public void addNotify() {
		    super.addNotify();		
		    resume();
		}
		
		private void updateState() {	
			//UPDATE DISINI
			x++;
		}
		
		//@Override
		public void paintComponent(Graphics g) {
		    super.paintComponent(g);	
		    Graphics2D g2d = (Graphics2D) g;    		
    		RenderingHints rh = new RenderingHints(RenderingHints.KEY_ANTIALIASING,RenderingHints.VALUE_ANTIALIAS_ON);
    	    rh.put(RenderingHints.KEY_RENDERING,RenderingHints.VALUE_RENDER_QUALITY);
    	    g2d.setRenderingHints(rh);
		    render(g2d);
		    g2d.dispose();
		    Toolkit.getDefaultToolkit().sync();
		}
		
		private void render(Graphics2D g2d){		
		    //RENDER DISINI
			//g2d.setFont(new Font("Neuropol X Rg", Font.PLAIN, 50));
			g2d.setFont(new Font("Arial", Font.PLAIN, 50));
    		g2d.drawString("X: "+x, 100, 100);		    
		}
		
		public void resume() {
	        isRunning = true;
	        thread = new Thread(this);
	        thread.start();
	    }

	    public void pause() {
	        isRunning = false;
	        boolean retry = true;
	        while (retry) {
	            try {
	                thread.join();
	                retry = false;
	            } catch (InterruptedException e) {
	                // try again shutting down the thread
	            }
	        }
	    }
		
		//@Override
		public void run(){	
			while(isRunning){
				long started = System.currentTimeMillis();
				updateState();
				repaint();
				float deltaTime = (System.currentTimeMillis() - started);
	            int sleepTime = (int) (FRAME_PERIOD - deltaTime);
	            if (sleepTime > 0) {
	                try {
	                    thread.sleep(sleepTime);
	                } catch (InterruptedException e) {
	                	System.out.println("Interrupted: " + e.getMessage());
	                }
	            }
	            while (sleepTime < 0) {
	                updateState();
	                sleepTime += FRAME_PERIOD;
	            }	            
	        }//end of while(isRunning)		    
		}//end of run()
		
    }//end of Canvas class
    
}//end of Main class