&
- 逻辑与，& 两边的表达式都会进行运算
- 整数的位运算符
&&
- 短路与，&& 左边的表达式结果为 false 时，&& 右边的表达式不参与计算
package constxiong.interview;
/**
* 测试 & &&
* @author ConstXiong
*/
public class TestAnd {
public static void main(String[] args) {
int x = 10;
int y = 9;
if (x == 9 & ++y > 9) {
}
System.out.println("x = " + x + ", y = " + y);
int a = 10;
int b = 9;
if (a == 9 && ++b > 9) {//a == 9 为 false，所以 ++b 不会运算，b=9
}
System.out.println("a = " + a + ", b = " + b);
//00000000000000000000000000000001
//00000000000000000000000000000010
//=
//00000000000000000000000000000000
System.out.println(1 & 2);//打印0
}
}
打印
x = 10, y = 10
a = 10, b = 9
0