java基础-运算符

1.是什么

运算符是一些特殊符号，主要用于数学函数、一些类型的赋值语句、逻辑比较方面

2.赋值运算符（=）

int a = 10;

3.算数运算符（+、-、*、/、%）

public class IntegerDiv {
    public static void main(String[] args) {
        int a = 10;
        int b = 3;
        System.out.println(a / b);
    }
}

public class ModCalc {
    public static void main(String[] args) {
        int num = 10;

        System.out.println(num % 2);
        System.out.println(num % -3);
        System.out.println(num % 4);
        System.out.println(num % 5);
        System.out.println(num % -6);
    }
}

4.比较运算符

public class CompareOprt {
    public static void main(String[] args) {
        int a = 10;
        int b = 15;
        int c = 10;

        System.out.println(a > b);
        System.out.println(a >= b);
        System.out.println(a < b);
        System.out.println(a <= b);
        System.out.println(a != b);

        System.out.println(a != c);
        System.out.println(a >= c);
        System.out.println(a <= c);
        System.out.println(a == b);
        System.out.println(a == c);

    }
}

5.逻辑运算符（与、或、非）

public class BooleanOprt {
    public static void main(String[] args) {
        boolean a = true;
        boolean b = false;

        System.out.println(a && b);
        System.out.println(a & b);
        System.out.println(a || b);
        System.out.println(a | b);

        System.out.println(a || (10 / 0 > 1));
        System.out.println(a | (10 / 0 > 1));

    }
}

 

6.运算符的优先级

public class PriorityExample {
    public static void main(String[] args) {
        int a = 1 + 3;
        int b = 2;
        boolean both = a > 0 && b > 0;
        System.out.println(both);

        boolean result = a < b + 5;
        System.out.println(result);

    }
}