java double计算
时间: 2023-11-04 12:11:23 浏览: 34
Java 中 double 是一种浮点数类型,可以进行基本的数学运算,如加减乘除等。以下是一些示例:
1. 加法:
```
double a = 1.5;
double b = 2.3;
double sum = a + b;
System.out.println("Sum: " + sum);
```
输出:
```
Sum: 3.8
```
2. 减法:
```
double a = 5.7;
double b = 2.1;
double difference = a - b;
System.out.println("Difference: " + difference);
```
输出:
```
Difference: 3.6
```
3. 乘法:
```
double a = 1.5;
double b = 2.3;
double product = a * b;
System.out.println("Product: " + product);
```
输出:
```
Product: 3.45
```
4. 除法:
```
double a = 5.6;
double b = 2.0;
double quotient = a / b;
System.out.println("Quotient: " + quotient);
```
输出:
```
Quotient: 2.8
```
需要注意的是,在使用 double 进行计算时,可能会遇到精度问题,因为 double 存储的是二进制小数,而非十进制小数。在比较两个 double 值是否相等时,应该使用 Double.compare() 方法,而非直接使用 == 运算符。