java中object类实例分析

public class ObjectStu {public static void main(String[] args) {Person per = new Person("小王",10,150);Person per1 = new Person("小王",20,140);Person per2 = per;System.out.println(per==per1);System.out.println(per.equals(per1));String str = "123";str.equals("123");str.hashCode();System.out.println(per.hashCode());System.out.println(per1.hashCode());System.out.println(per2.hashCode());System.out.println(per);System.out.println(per1);}}class Person {String name;int age;int height;public Person(String name, int age,int height) {super();this.height = height;this.name = name;this.age = age;}//重写hashcode@Override public int hashCode() {final int prime = 31;int result = 1;result = prime * result + age;result = prime * result + height;result = prime * result + ((name == null) ? 0 : name.hashCode());return result;}@Override public Boolean equals(Object obj) {if (this == obj)  return true;if (obj == null)  return false;if (getClass() != obj.getClass())  return false;Person other = (Person) obj;if (age != other.age)  return false;if (height != other.height)  return false;if (name == null) {if (other.name != null)  return false;} else if (!name.equals(other.name))  return false;return true;}@Override public String toString() {return "Person[name="+name+",age="+age+"]";}}