java OOP -接口

package com.s2b.ch3;
//接口定义一个方法
public interface Introduceable {
 
 public String detail();
}

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package com.s2b.ch3;
//学生类继承接口定义方法
public class AccpSchool implements Introduceable {

 public String detail() {
  return "这里是ACCP中心";
 }
 //Printer p=new Printer();
 Printable printer;
 //实现接口打印机
 public void setPrinter(Printable p){
  printer=p;
 }
 //运行接口中的方法
 public void print(Introduceable ins)
 {
  printer.print(ins.detail());
 }
}

---------------end^-^-------------------

package com.s2b.ch3;
//学生类有接口 ，定义一个方法
public class AccpStudent implements Introduceable {
 public String detail() {
 
  return "我是一个ACCP学员";
 }
}

---------------end^-^-------------------
package com.s2b.ch3;
//教师类，继承接口
public class AccpTeacher implements Introduceable {
 public String detail() {
 
  return "本人是ACCP教员";
 }
}

---------------end^-^-------------------

package com.s2b.ch3;
//一个接口打印机
public interface Printable {
 public void print(String content);

}

---------------end^-^-------------------
package com.s2b.ch3;
//继承接口打印机 黑白打印
public class BlackPrinter implements Printable {

 public void print(String content) {

  System.out.println("黑白打印:"+content);
 }
}

---------------end^-^-------------------

package com.s2b.ch3;
//继承接口打印机 彩色打印
public class ColorPrinter implements Printable {

 public void print(String content) {

  System.out.println("彩色打印:"+content);
 }
}

---------------end^-^-------------------

package com.s2b.ch3;
//打印机
public class Printer {
 
 public void print(String content)
 {
  System.out.println(content);
 }
}

---------------end^-^-------------------

package com.s2b.ch3;

public class Test {
 //主方法
 public static void main(String[] args) {
  AccpSchool as=new AccpSchool();
  AccpTeacher at=new AccpTeacher();
  as.setPrinter(new BlackPrinter());
  //黑白打印:这里是ACCP中心
  as.print(as);
  //黑白打印:本人是ACCP教员
  as.print(at);
  //黑白打印:我是一个ACCP学员
  AccpStudent student=new AccpStudent();
  as.print(student);
 }
}