[Java学习笔记] 猜猜看（1）

题目1、赋值或传参时，基本数据类型是“复制值”，而非基本类型是“复制引用”。

class Number {
	int i;
}

public class Assignment {
	public static void main(String[] args) {
		Number n1 = new Number();
		Number n2 = new Number();
		n1.i = 9;
		n2.i = 47;
		System.out.println("1: n1.i: " + n1.i + ", n2.i: " + n2.i);
		n1 = n2;
		System.out.println("2: n1.i: " + n1.i + ", n2.i: " + n2.i);
		n1.i = 27;
		System.out.println("3: n1.i: " + n1.i + ", n2.i: " + n2.i);
	}
}

运行结果：

1: n1.i: 9, n2.i: 47
2: n1.i: 47, n2.i: 47
3: n1.i: 27, n2.i: 27

题目2、有趣儿的操作符 — “x”

		int x = 1;
		int y = 2;
		String string = "3";
		String result1 = string + y + x;
		String result2 = x + y + string;
		System.out.println("string + x + x = " + result1);
		System.out.println("x + y + string = " + result2);

运算结果：

string + y + x = 321
x + y + string = 33

继续追加中......