Java对象#克隆行为？

Question

我正在测试Object#clone方法的行为，我不明白为什么下面的代码会打印true，Diego，Diego，我本来希望它打印true，Diego，Armando，因为p.getName（）==p2。getName（）打印为true。请任何人解释一下为什么。如果setName（“Armando”）指向同一个字符串，是否不修改p对象？多谢各位

public class Main {

public static void main(String[] args) {
    Person p = new Person();
    p.setName("Diego");
    Person p2 = null;
    try {
         p2 = (Person) p.clonar();
    } catch (CloneNotSupportedException e) {
        e.printStackTrace();
    }
    System.out.println(p.getName() == p2.getName());
    System.out.println(p.getName());
    p2.setName("Armando");
    System.out.println(p.getName());
}
}

class Person implements Cloneable {
private String name;

public Object clonar() throws CloneNotSupportedException {
    return this.clone();
}

public String getName() {
    return name;
}

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

Answer 1

因为当时两个引用都指向同一个字符串对象。但是当你打电话给p2时。setName，p2的名称引用指向另一个字符串对象。答案由@dunni提供

为了重现我想要的行为，我首先需要添加一个可变类，作为占位符（地址）：

public class Main {

public static void main(String[] args) {
    Person p = new Person();
    Person p2 = null;
    Address address = new Address("paseo de la reforma");
    p.setAddress(address);

    try {
         p2 = (Person) p.clonar();
    } catch (CloneNotSupportedException e) {
        e.printStackTrace();
    }   
    p2.getAddress().setStreet("lomas de chapultepec");
    System.out.println(p.getAddress().getStreet());
}
}

class Address {
private String street;

public Address(String street) {
    this.street = street;
}

public String getStreet() {
    return street;
}

public void setStreet(String street) {
    this.street = street;
}

  }

class Person implements Cloneable {
private String name;
private Integer edad;
private int mes;
private Address address;

public Integer getEdad() {
    return edad;
}

public void setEdad(Integer edad) {
    this.edad = edad;
}

public int getMes() {
    return mes;
}

public void setMes(int mes) {
    this.mes = mes;
}

public Object clonar() throws CloneNotSupportedException {
    return this.clone();
}

public String getName() {
    return name;
}

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

public Address getAddress() {
    return address;
}

public void setAddress(Address address) {
    this.address = address;
}
}

现在打印：

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