?? threaddraw.java
字號:
import java.awt.*;
import java.applet.*;
import java.awt.event.*;
public class ThreadDraw extends Applet
{
MovingShape [] shapes;
public void init()
{
//{{INIT_CONTROLS
setLayout(null);
setSize(426,266);
//}}
shapes = new MovingShape[ 10 ];
for( int i=0; i<shapes.length; i++ )
shapes[i] = new MovingShape(this);
}
public void start()
{
for( int i=0; i<shapes.length; i++ );
//shapes[i].start(); // it started when it's constructed
super.start();
}
public void stop()
{
for( int i=0; i<shapes.length; i++ )
shapes[i].suspend(); //deprecated
super.stop();
}
public void destroy()
{
for( int i=0; i<shapes.length; i++ )
shapes[i].stop(); //deprecated
super.destroy();
}
public static void main(String [] args) //加入main,使之能當(dāng)Application應(yīng)用
{
Frame f = new Frame();
f.setSize(450,300 );
ThreadDraw p = new ThreadDraw();
f.add ( p );
f.setVisible( true );
p.init();
p.start();
f.addWindowListener( new WindowAdapter(){
public void windowClosing(WindowEvent e){ System.exit(0); }
});
}
//{{DECLARE_CONTROLS
//}}
}
class MovingShape extends Thread
{
boolean bContinue = false;
private int size=100;
private int speed=10;
private Color color;
private int type;
private int x,y,w,h,dx,dy;
protected java.awt.Component app;
MovingShape( java.awt.Component app )
{
this.app = app;
x = (int)(Math.random() * app.getSize().width);
y = (int)(Math.random() * app.getSize().height);
w = (int)(Math.random() * size );
h = (int)(Math.random() * size );
dx = (int)(Math.random() * speed );
dy = (int)(Math.random() * speed );
color = new Color (
(int)(Math.random()*128+128),
(int)(Math.random()*128+128),
(int)(Math.random()*128+128) );
type = (int)(Math.random() * 3 );
bContinue = true;
this.start(); // 注意,線程剛構(gòu)造出來,這里就立即進(jìn)行啟動
}
public void run()
{
while( true ){
x += dx;
y += dy;
if( x<0 || x+w>app.getSize().width ) dx = -dx;
if( y<0 || y+h>app.getSize().height) dy = -dy;
Graphics g = app.getGraphics();
switch( type ){
case 0:
g.setColor(color);
g.fillRect( x,y,w,h );
g.setColor( Color.black );
g.drawRect( x,y,w,h );
break;
case 1:
g.setColor(color);
g.fillOval( x,y,w,h );
g.setColor( Color.black );
g.drawOval( x,y,w,h );
break;
case 2:
g.setColor(color);
g.fillRoundRect( x,y,w,h,w/5,h/5);
g.setColor( Color.black );
g.drawRoundRect( x,y,w,h,w/5,h/5 );
break;
}
//System.out.println(x+","+y+","+w+","+h+":"+type+","+dx+","+dy);
try{ Thread.sleep(130); } catch( InterruptedException e ){}
}
}
}
?? 快捷鍵說明
復(fù)制代碼
Ctrl + C
搜索代碼
Ctrl + F
全屏模式
F11
切換主題
Ctrl + Shift + D
顯示快捷鍵
?
增大字號
Ctrl + =
減小字號
Ctrl + -