linedemo.java

这是《Java 2 简明教程(第2版)》一书配套的源代码。

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

public class LineDemo extends Applet
{
  public void paint(Graphics g)
{
int x[]={0,100,100,0,0};
int y[]={0,0,100,100,0};
g.drawPolyline(x,y,5);
g.drawLine(0,0,100,0);
g.drawLine(100,0,100,100);
g.drawLine(100,100,0,100);
g.drawLine(0,100,0,0);
for (int n=0;n<=100;n+=20)
      for (int m=100;m>=0;m-=20)
        {
            g.drawLine(m,n,n,m);
     }
g.drawString("画线",35,120);
}
}