dengji.java

用接口实现大小写转换2

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

interface printable
{ String myprint(); 
}

 class stu implements printable
{String 姓名,性别,年龄,专业;
 public stu(String a,String b,String c,String d)
{this.姓名=a;
 this.性别=b;
 this.年龄=c;
 this.专业=d;} 
public String myprint()
{return (this.姓名+this.性别+this.年龄+this.专业);} 
}


 class worker implements printable
{String 姓名,性别,年龄,单位;
public worker(String a,String b,String c,String d)
{this.姓名=a;
 this.性别=b;
 this.年龄=c;
 this.单位=d;} 
public String myprint()
{return (this.姓名+this.性别+this.年龄+this.单位);} 
}


public class dengji extends Applet
{ stu stu1=new stu("张洪波    ","男   ","22   ","计算机网络工程");
  worker worker1=new worker("张浩   ","男   ","25   ","新浪CEO");
public void paint (Graphics g)
 { Font f=new Font("Dialog",Font.PLAIN,25);
   g.setFont(f);
   g.setColor(Color.red);
   g.drawString("学生: "+stu1.myprint(),60,60);
   g.drawString("工人: "+worker1.myprint(),60,90);
 }
 }