一个简单的例子，证明JAVA参数是通过值传递

package com.my.study;

public class PassByValueTest {

    public static void changeName(Person person) {
        person.setName("NewName");
    }

    public static void changePerson(Person person) {
        person = new Person();
        person.setName("LiLei");
        person.setAge(28);
    }

    public static void main(String[] args) {
        Person person = new Person();
        person.setName("xiaoming");
        person.setAge(18);
        System.out.println(person);

        changePerson(person);
        System.out.println(person);

        changeName(person);
        System.out.println(person);
    }
}

class Person {
    public Person() {
    }

    private String name;
    private int age;

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    public int getAge() {
        return age;
    }

    public void setAge(int age) {
        this.age = age;
    }

    public String toString() {
        return "Name: " + this.name + ", Age: " + this.age;
    }
}