运算符

运算符

本文根据狂神说Java课程总结

//算数运算符 + - * / % ++ --
int a1 = 2;
int a2 = 10;
//字符串连接符 +
System.out.println("整数相加："+(a1+a2));
System.out.println("字符串连接："+(a1+a2+""));
System.out.println("字符串连接："+(""+a1+a2));

int b1 = 12;
int b2 = -12;
int b3 = 10;
int b4 = -10;
//整数取余，结果符号与被除数相同
System.out.println("12%10 = "+b1%b3);
System.out.println("(-12)%10 = "+b2%b3);
System.out.println("12%(-10) = "+b1%b4);
System.out.println("(-12)%(-10) = "+b2%b4);
int c1 = 15;
int c2 = -15;
int c3 = 10;
//整数除法，结果向0取整
System.out.println("15/10 = "+ c1/c3);
System.out.println("(-15)/10 = "+ c2/c3);

//逻辑运算符 && || !
//&&:短路
int d1 = 5;
System.out.println(d1<2 && d1++<2);
System.out.println(d1);//如果短路，则d1++不执行，d1=5;

//位运算符& | ~ ^ << >> (与 或 非 亦或 左移 右移)
int e1 = 0b1001_0111;
int e2 = 0b0100_0101;
System.out.println("e1:0b1001_0111");
System.out.println("e2:0b0100_0101");
System.out.println("二进制输出&:"+Integer.toBinaryString(e1&e2));
System.out.println("二进制输出|:"+Integer.toBinaryString(e1|e2));
System.out.println("二进制输~:"+Integer.toBinaryString(~e2));
System.out.println("二进制输出^:"+Integer.toBinaryString(e1^e2));
System.out.println("0b1左移3位:"+Integer.toBinaryString(0b1<<3));
System.out.println("0b1000右移3位:"+Integer.toBinaryString(0b1000>>3));

运行结果：