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改变变量的例子

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/**
* @author xixing
* @version 1.0
* @date 2020/7/2 16:22
*/
public class TestTransverValue {

public void changeValue1(int num){
num=1000;
}

public void changeValue2(Person person){
person.setName("xxx");
}

public void changeValue3(String str){
str="xxx";
}

public static void main(String[] args) {
TestTransverValue test=new TestTransverValue();
int num=20;
test.changeValue1(num);
System.out.println("num========"+num);
Person person=new Person("abc");
test.changeValue2(person);
System.out.println("personName======"+person.getName());
String str="abc";
test.changeValue3(str);
System.out.println("str===="+str);
}
}

class Person{
public String name;

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

public String getName() {
return name;
}

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