Java 值传递和引用传递

public class Test3 {
    public static void change(int []a){
        a[0]=50;
    }
    public static void main(String[] args) {
        int []a={10,20};
        System.out.println(a[0]);
        change(a);
        System.out.println(a[0]);
    }
}

public class Test3 {
    public static void change(int a){
        a=50;
    }
    public static void main(String[] args) {
        int a=10;
        System.out.println(a);
        change(a);
        System.out.println(a);
    }
}