小编A.S*_*hov的帖子

What is the difference between creating Object, for example in my code, type Obj with operator "new" and Object type String?

public class Objs {
    int a;

    public Objs(int a)
    {
        this.a = a;
    }

    public static void main(String[] args)
    {
        String str = new String("Hello");
        String str1 = str; // (str1 == str) == true
        str += ", world!!"; // after this (str1 == str) == false - Why?

        Objs o = new Objs(4);
        Objs o1 = o;        //(o …