对java值传递与传引用的测试

package reference;

public class Refer {

public static void main(String[] args) {
Person obj = new Person();

System.out.println(obj.getName());
getYourName(obj);
System.out.println(obj.getName());

(new Refer()).method1();
(new Refer()).method2();
new Refer().method3();
}

public static int getYourName(Person obj) {
obj.setName("yinter");
return 0;
}

void method1() {
int x = 0;
this.change1(x);
System.out.println(x);
}

void change1(int i) {
i = 1;
}

void method2() {
StringBuffer x = new StringBuffer("Hello");
this.change2(x);
System.out.println(x);
}

void change2(StringBuffer i) {
i.append(" world!");
}

void method3() {
StringBuffer x = new StringBuffer("Hello");
this.change3(x);
System.out.println(x);
}

void change3(StringBuffer i) {
i = new StringBuffer("hi");
i.append(" world!");
}
}