java基础07基本运算符

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/(double)b);
    }
}

package operator;

public class Demo02 {
    public static void main(String[] args) {
        long a = 1232321321321L;
        int b = 123;
        short c = 10;
        byte d = 8;

        System.out.println(a+b+c+d);//long
        System.out.println(b+c+d);//int
        System.out.println(c+d);//int
    }
}

package operator;

public class Demo03 {
    public static void main(String[] args) {
        //关系运算符返回的结果： 正确，错误     布尔值

        int a = 10;
        int b = 20;
        int c = 21;

        //取余    模运算
        System.out.println(c%a);// c / a    21 / 10 =2.....1

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