?? 第七章例子.txt
字號:
7-例子1
import java.applet.*;import java.awt.*;
public class Example7_1 extends Applet
{Button button1; Button button2;
int sum;
public void init()
{ button1=new Button("yes");
button2=new Button("No");
add(button1);
add(button2);
}
public void start()
{ sum=0;
for(int i=1;i<=100;i++)
{sum=sum+i;}
}
public void stop()
{ }
public void destroy()
{ }
public void paint(Graphics g)
{g.setColor(Color.blue);
g.drawString("程序設計方法",20,60);
g.setColor(Color.red);
g.drawString("sum= ",20,100);
}
}
7-例子2
import java.applet.*;
import java.awt.*;
public class Example7_2 extends Applet
{ int initcount=0,startcount=0,stopcount=0,destroycount=0,paintcount=0;
public void init()
{ initcount=initcount+1;}
public void start()
{ startcount++;}
public void stop()
{ stopcount++;}
public void destroy()
{ destroycount++;}
public void paint(Graphics g)
{ paintcount++;
g.drawString("initcount ="+initcount,10,20);
g.drawString("startcount ="+startcount,10,40);
g.drawString("stopcount ="+stopcount,10,60);
g.drawString("deatroycount="+destroycount,10,80);
g.drawString("paintcount ="+paintcount,10,100);
}
}
7-例子3
import java.applet.*;import java.awt.*;
public class Example7_3 extends Applet
{ int x;
public void init()
{ x=5; }
public void start()
{ x=x+20; repaint(); }
public void stop() {}
public void paint(Graphics g)
{g.drawString("我們是大學生",20,x+10); }
}
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