算术运算符:+,-,*,/,%(取余)(模),++,--
赋值预算符: = 例: ( int a = 10;)
关系运算符: > , < , >= ,<= , == , != (不等于), instanceof
逻辑预算符: && , || , ! (与或非)
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 //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 = 123123123123123L; 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; //取余叫做模运算 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); } }
package operator; public class Demo04 { public static void main(String[] args) { //++ -- 自增,自减 一元运算符 int a = 3; System.out.println(a); int b = a++;//执行完这个代码后,先给b赋值,再自增 // a++ a = a + 1; System.out.println(a); // a = a + 1; int c = ++a;//执行完这个代码前,先自增,再给c赋值 System.out.println(a); System.out.println(b); System.out.println(c); //幂运算 2^3 2*2*2 = 8 很多运算我们会使用 工具类操作! double pow = Math. pow(3,2); System.out.println(pow); } }