Java--运算符
目录
运算符
图片来源Java基础07：基本运算符哔哩哔哩bilibili
package operator;
public class Demo1 {
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 Demo2 {
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 Demo3 {
public static void main(String[] args) {
//关系运算符返回的结果：正确，错误 布尔值
//if
int a = 10;
int b = 20;
int c = 21;
//取余 模运算
System.out.println(c%a);//c / a
System.out.println(a>b);
System.out.println(a<b);
System.out.println(a==b);
System.out.println(a!=b);
}
}
package operator;
public class Demo4 {
public static void main(String[] args) {
//++ -- 自增 自减 一元运算符
int a = 3;
int b = a++; //a = a + 1 //执行完这行代码后，先给b赋值，再自增
System.out.println(a);
int c = ++a; //执行完这行代码前，先自增，再给b赋值
System.out.println(a);
System.out.println(b);
System.out.println(c);
System.out.println(c);
System.out.println(c);
//幂运算 2^3 2*2*2 = 8
double pow = Math.pow(2,3);
System.out.println(pow);
}
}
package operator;
public class Demo5 {
//逻辑运算符
public static void main(String[] args) {
//与 （and) 或(or) 非（取反）
boolean a = true;
boolean b = false;
System.out.println("a && b");
}
}