package hello;public class test {public static void main(String[] args) {//最有效率的方式算出2乘以8等于几？System.out.println(2<<3);//		对两个整数变量的值进行互换 (不需要第三方变量)int a = 3,b = 5;System.out.println("a="+a+",b="+b);/*开发时，使用第三方变量的形式，因为阅读性强。int c ;c = a;a = b;b = c;*///这种方式不要用，如果两个整数的数值过大，会超出int范围，会强制转换。数据会变化。/*a = a + b; //a = 3 + 5;a = 8;b = a - b; //3+5-5 = 3;b = 3;a = a - b; //3+5-3 = 5;a = 5;*//*面试的时候用。a = a ^ b; //a = 3 ^ 5;b = a ^ b; //b = (3^5)^5; b = 3;a = a ^ b; //a = (3^5)^3; a = 5;*/System.out.println("a="+a+",b="+b);}
}