java中的interface接口实例详解

 
package hello;  interface competer{  //定义接口   void set_compt(int com);   void print_compt_information(); }   class bj implements competer{ //接口实现      int com ;    public void set_compt(int com)   {     this.com = com ;   // System.out.println("端口" + com);   }   public void print_compt_information()   {     System.out.println("端口" + com);     System.out.println("笔记本");   } }  class taishi implements competer{      int com ;   public void set_compt(int com)   {     this.com = com ;     //System.out.println("端口" + com);   }   public void print_compt_information()   {     System.out.println("端口" + com);     System.out.println("台式机");   }    }  public class inter {   public static void main(String[] args)   {     taishi com = new taishi();     bj bjj = new bj();     com.set_compt(100);     bjj.set_compt(120);     com.print_compt_information();     bjj.print_compt_information();   } }