Interface的精髓——《Thinking in Java》随笔025

//: InterfacePower.java
package cn.skyfffire;

import java.util.Vector;

/**
 * 深究抽象类的应用
 *
 * user: skyfffire
 * time: 下午3:20:35
 */
public class InterfacePower {
    /**
     * 为对象定义相同的接口
     * 
     * @author skyfffire
     *
     */
    interface Student {
        public String writeHomework();
    }
    
    /**
     * 抽象类的测试
     * 
     * @param args
     */
    public static void main(String[] args) {
        // 定义一个班级属性用来封装该班级的学生
        Vector<Student> classes = new Vector<Student>();
        
        // 定义三个学生，给予不同的写作业速度
        Student xiaoMing = new Student() {
            @Override
            public String writeHomework() {
                return "The xiaoMing is very slow to write homework.";
            }
        };
        
        Student xiaoHong = new Student() {
            @Override
            public String writeHomework() {
                return "The xiaoHong is very quick to write homework.";
            }
        };
        
        Student xiaoGang = new Student() {
            @Override
            public String writeHomework() {
                return "The xiaoGang is normal to write homework.";
            }
        };
        
        // 将三个同学添加到这个班级
        classes.add(xiaoMing);
        classes.add(xiaoHong);
        classes.add(xiaoGang);
        
        // 遍历这个班级的所有人,就算各自的习惯(方法实现)不同
        // 但是都实现了同一个接口的同一个方法，所以可以拥有同样的行为。
        for (Student s : classes) {
            System.out.println(s.writeHomework());
        }
    }
}

///:~