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Java-Quelltext

package javaapplication6;

import java.awt.*;
//import java.awt.event.*;


public class myWindow extends Frame {
    public void myWindow(int width, int height, String title) {
        Frame W;
        W = new Frame(title);

        W.addWindowListener(
            new java.awt.event.WindowAdapter() {
                @Override
                public void windowClosing(java.awt.event.WindowEvent e) {
                    System.exit(0);
                } 
            } 
        );
        
    W.setSize(width,height);
    W.setVisible(true);
    } //end (SUB) myWindow
} //end class myWindow

Java-Quelltext

package javaapplication6;

import java.awt.*;
//import java.awt.event.*;


public class JavaApplication6 {

    public static void main(String[] args) {
  
        myWindow win;
        win = new myWindow();
        win.myWindow(640,480,"test");
       
        Graphics test ;
        test = win.getGraphics();
        
        if(test != null){
            test.drawString("test",10,10);
        
            win.paint(test);//??
        } //end if
        

    } //end main()
} //end class

Java-Quelltext

package javaapplication6;

import java.awt.*;
//import java.awt.event.*;


public class myWindow extends Frame {

    public void myWindow(int width, int height, String title) {
    setSize(width,height);
        setTitle(title);

        addWindowListener(
            new java.awt.event.WindowAdapter() {
                @Override
                public void windowClosing(java.awt.event.WindowEvent e) {
                    System.exit(0);
                } 
            } 
        );

    setVisible(true);
        
    } //end (SUB) myWindow
    
    @Override
    public void paint(Graphics g) {
        g.drawString("test", 0, 40);
    } //end (SUB) paint
    
} //end class myWindow

Java-Quelltext

package javaapplication6;

public class JavaApplication6 {
    
    public static void main(String[] args) {
  
        myWindow win;
        win = new myWindow();
        win.myWindow(640,480,"test");
        
        win.buffer.drawString("das ist ein test",0,0);
        win.buffer.drawString("das ist ein test",20,100);
        win.buffer.drawRect(100,100,200,200);
        win.buffer.drawRect(0,0,90,90);
        win.buffer.drawRect(630, 470, 639, 479);
    }
}

Java-Quelltext

package javaapplication6;

import java.awt.*;
import javax.swing.*;

public class myWindow {
    JFrame Window;
    Image backbuffer;
    Graphics buffer;
        
    public void myWindow(int width, int height, String title) {
        Window = new JFrame();
        
        Window.setTitle(title);
        Window.setBounds(0,0,width,height);
        Window.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        Window.setContentPane(new myComponent());
        
    Window.setVisible(true);
        
        backbuffer = Window.createImage(width,height);
        buffer = backbuffer.getGraphics();
    }
    
    class myComponent extends JComponent {
        @Override
        public void paint(Graphics g) {
            g.drawImage(backbuffer, 0, 0, null);
        }
    }
}