2016/1/21 练习 创建 接口interface 应用implements 类class 并实例化调用

 package testinterface;

 public interface ICpu {
     //电压
     public boolean  dianya();
     //控制
     public void  kongzhi();
     //运算
     public void  yunsuan();
     //存储
     public void  cunchu();

 }

 public class Intel implements ICpu{

     @Override
     public boolean dianya() {
         System.out.println("电压正常");
         return true;
     }

     @Override
     public void kongzhi() {
         System.out.println("控制单元工作");

     }

     @Override
     public void yunsuan() {
         System.out.println("运算单元工作");

     }

     @Override
     public void cunchu() {
         System.out.println("存储单元工作");

     }

 package testinterface;
 import testinterface.ICpu;

 public class Computer {

     private ICpu cpu;

     public ICpu getCpu() {
         return cpu;
     }

     public void setCpu(ICpu intel) {
         this.cpu = intel;

         String i="intel";
         if( !i.equals("intel")){
             System.out.println("cpu不可以使用");

         }
         else if (i.equals("intel")){
             System.out.println("cpu可以使用");
         }
         else{

         }

     }

 }

调用

 package testinterface;

 public class Testcomputer {

     public static void main(String[] args) {
         Computer in=new Computer();
         in.setCpu(new Intel());

         }
     }