千峰逆战班，day20_Question9

在千峰“逆战班”学习的第20天
清醒温柔知进退，努力上进且优秀
今天的学习内容内部类中的静态内部类、局部内部类、匿名内部类。Object类中的getClass()方法、hashCode()方法、toString()方法、equals()方法。
中国加油！武汉加油！千峰加油！我自己加油

Question9习题
2. 运行结果为：
null 0
Tom 18
3. 运行结果为：
true
false
4. 运行结果为：
true
false
6. ABCD
7.

package com.qf.day19.question;

public class TestWorker {
	public static void main(String[] args) {
		Object w1 = new Worker("Tom",22,"13811111111",9500.0);
		Object w2 = new Worker("Tony",24,"13822222223",8500.0);
		Object w3 = new Worker("Tony",24,"13822222223",8500.0);
		System.out.println(w1);
		System.out.println(w2.toString());
		System.out.println(w3.toString());
		System.out.println(w1.equals(w2));
		System.out.println(w1.equals(w3));
		System.out.println(w2.equals(w3));	
	}
}
class Worker{
	String name;
	int age;
	String phone;
	double salary;
	public Worker(){}
	public Worker(String name,int age,String phone,double salary){
		super();
		this.name = name;
		this.age = age;
		this.phone = phone;
		this.salary = salary;
	}
	public String toString(){
		return this.name + "\t" + this.age + "\t" + this.phone + "\t" + this.salary;
	}
	public boolean equals(Object obj){
		if(this == obj){
			return true;
		}
		if(obj == null){
			return false;
		}
		if(this.getClass() != obj.getClass()){
			return false;
		}
		Worker w = (Worker)obj;
		if(this.name.equals(w.name) && this.age == w.age && this.phone.equals(w.phone) && this.salary == w.salary){
			return true;
		}
		return false;
	}
}

运行结果：

9. ABCD

package com.qf.day19.question;

public class TestLamp {
	public static void main(String[] args){
		Lamp lamp = new Lamp();
		class Red implements Light{
			public void shine(){
				System.out.println("shine in red");
			}
		}
		Light light = new Red(); 
		lamp.on(light);
		
		Light light1 = new Light(){
			public void shine(){
				System.out.println("shine in yellow");
			}
		};
		lamp.on(light1);
	}
}
interface Light{
	void shine();
}
class Lamp{
	public void on(Light light){
		light.shine();
	}
}

运行结果：