Question

求高手帮给这个java代码加上注释和算法描述 谢谢了！是一个圆扩散的小程序

import java.awt.*;
import java.applet.*;

public class CircleS extends Applet implements Runnable
{
int W = 600, H = 600, x0 = W/2, y0 = H/2, r0 = 50, r1 = 200;
int dr = 2, r = r0, n = 10, d = 10, ms = 100;

Thread t1;

public void start( )
{
t1 = new Thread( this );
t1.start( );
}

//
public void run( )
{
while( true )
{
try{ Thread.sleep( ms ); }
catch( InterruptedException e ) { }

r = r + dr;
if( r < r0 || r > r1 ) dr = -dr;

repaint();

}

}

public void drawC( int r, Graphics g )
{
int rr;
for( int i = 0; i < n; i++ )
{
rr = r + i*d;
g.drawOval( x0-rr, y0-rr, 2*rr, 2*rr );
}
}
public void paint(Graphics g)
{
g.drawString("Hello World", 20, 20);
drawC( r, g );

}
}

Answer 1

多线程画椭圆、写Hello World