JavaSE---值传递_引用传递

public class ValueOrReferenceTransferTest {

    static String say(String name){
        name = "rose";
        return name;
    }

    static int say(int a){
        a = 4;
        return a;
    }

    static Person say(Person person){
        person.setName("rose");
        return person;
    }

    static Person say1(Person person){
        return new Person("jack");
    }

    public static void main(String[] args) {
        String name = "jack";
        String s = say(name);
        System.out.println("name:"+name+" ,s:"+s);// name:jack ,s:rose

        int a =1;
        int i = say(a);
        System.out.println("a:"+a+" ,i:"+i);// a:1 ,i:4
        
        Person person = new Person("rose");
        Person person1 = say(person);
        System.out.println("p:"+person+" ,p1:"+person1);// p:Person{name=‘rose‘} ,p1:Person{name=‘rose‘}

        Person person2 = say1(person);
        System.out.println("p:"+person+" ,p2:"+person2);// p:Person{name=‘rose‘} ,p2:Person{name=‘jack‘}

    }

    public static class Person{
        private String name;

        public Person(String name) {
            this.name = name;
        }

        public String getName() {
            return name;
        }

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

        @Override
        public String toString() {
            return "Person{" +
                    "name=‘" + name + ‘\‘‘ +
                    ‘}‘;
        }
    }
}