基本运算符

基本运算符

1、算术运算符：+ ，-， *， /， %， ++， --

2、赋值运算符 =

3、关系运算符 > , < , >= , <= , == , != , instanceof

4、逻辑运算符 && , || , !

以上需熟练

5、位运算符 & , ^ , ~ , >> , << , >>>(了解即可)

6、条件运算符 ? :

7、扩展赋值运算符 += ， -= ， *= ， /=

package operator;

public class demo01 {
    public static void main(String[] args) {
        //二元运算符
        //Ctrl + d 复制当前行到下一行
        int a = 10;
        int b = 20;
        int c = 25;
        int d = 25;

        System.out.println(a + b);
        System.out.println(a - b);
        System.out.println(a * b);
        System.out.println(a / b);
        System.out.println(a / (double)b);
        System.out.println((double)a / b);
        System.out.println((double)(a / b));

        long aa = 1234567890L;
        int bb = 123;
        short cc = 10;
        byte dd = 8;

        System.out.println(aa + bb + cc + dd);
        System.out.println(bb + cc + dd);
        System.out.println(cc + dd);

        //关系运算符，正确，错误，结果为布尔值
        int a1 = 10;
        int a2 = 20;
        int a3 = 23;
        System.out.println(a3 % a2);//模运算，23/20=1....3
        System.out.println(a1 > a2);
        System.out.println(a1 < a2);
        System.out.println(a1 == a2);
        System.out.println(a1 != a2);
    }
}