Practical Java笔记一:区别引用类型和原始类型

public class RefereceAndPrimit {

    
    public static void main(String[] args) {
        int a = 1;
        int b = 2;
        Point x = new Point(0,0);
        Point y = new Point(1,1);
        
        System.out.println("a is "+a);
        System.out.println("b is "+b);
        System.out.println("x is "+x);
        System.out.println("y is "+y);
        System.out.println("a is "+a);
        System.out.println("------------");
        
        a = b;
        a++;
        x = y;  //修改的是object reference而不是object本身，x和y都是指向同一对象，所以对x改变同时也对y改变
        x.setLocation(5, 5);

        System.out.println("a is "+a);
        System.out.println("b is "+b);
        System.out.println("x is "+x);
        System.out.println("y is "+y);
        
    }

}