增加淘宝群内容，修改部分文件组织

数据结构(双语)/数据结构 day16【瑞客论坛 www.ruike1.com】/代码/11-哈希表/src/com/mj/model/Person.java

@@ -0,0 +1,43 @@
+package com.mj.model;
+
+public class Person implements Comparable<Person> {
+	private int age;   // 10  20
+	private float height; // 1.55 1.67
+	private String name; // "jack" "rose"
+	
+	public Person(int age, float height, String name) {
+		this.age = age;
+		this.height = height;
+		this.name = name;
+	}
+	
+	@Override
+	/**
+	 * 用来比较2个对象是否相等
+	 */
+	public boolean equals(Object obj) {
+		// 内存地址
+		if (this == obj) return true;
+		if (obj == null || obj.getClass() != getClass()) return false;
+		// if (obj == null || !(obj instanceof Person)) return false;
+		
+		// 比较成员变量
+		Person person = (Person) obj;
+		return person.age == age
+				&& person.height == height
+				&& (person.name == null ? name == null : person.name.equals(name));
+	}
+	
+	@Override
+	public int hashCode() {
+		int hashCode = Integer.hashCode(age);
+		hashCode = hashCode * 31 + Float.hashCode(height);
+		hashCode = hashCode * 31 + (name != null ? name.hashCode() : 0);
+		return hashCode;
+	}
+
+	@Override
+	public int compareTo(Person o) {
+		return age - o.age;
+	}
+}