位运算符

class TestBit{
	public static void main(String[] args){
		int i1 = 31;
		
		System.out.println(i1<<3);//248
		System.out.println(i1<<28);
		
		System.out.println(i1>>2);//7
		System.out.println(i1>>>2);//7

		int i2 = -31;
		System.out.println(i2>>2);//-8
		System.out.println(i2>>>2);//1073741816
		
		System.out.println(12 & 5);//4
		System.out.println(12 | 5);//13
		System.out.println(12 ^ 5);//9
		System.out.println(~12);//-13

	}
}

输出结果：

248
-268435456
7
7
-8
1073741816
4
13
9
-13