运算符

• 算术运算符：+，-，*，/，%（模，取余），++，--

• 赋值运算符：=

• 关系运算符：<,>,>=,<=,==,!=，instanceof

• 逻辑运算符：&&，||,！

• 位运算符：&，|,^,~,>>,<<,>>>

• 条件运算符：?:

• 扩展赋值运算符：+=，-+，*=，/=

package operator;
 ​
 public class Demo01 {
     public static void main(String[] args) {
         //二元运算符
         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 = 123123123123123L;
         int b = 123;
         short c = 10;
         byte d = 8;
 ​
         System.out.println(a + b + c + d);
         System.out.println(b + c + d);
         System.out.println(c + d);//int之下不同类型计算后转为int类型
     }
 }

 package operator;
 ​
 public class Demo03 {
     public static void main(String[] args) {
         //关系运算符返回结果：布尔值
 ​
         int a = 10;
         int b = 20;
         int c = 21;
 ​
         System.out.println(c%a);//取余，模运算
 ​
         System.out.println(a < b);
         System.out.println(a > b);
         System.out.println(a == b);
         System.out.println(a != b);
     }
 }