Java 中的 BigDecimal scale()方法
原文:https://www . geesforgeks . org/big decimal-scale-method in-Java/
java . math . BigDecimal . scale()是 Java 中的一个内置方法，它返回这个 BigDecimal 的小数位数。
- For zero or positive values, the scale is the number of digits to the right of the decimal point.
- For negative value, the unscaled value of the number is multiplied by the negative power of the scale of ten.
语法:
public int scale()
参数:该方法不接受任何参数。
返回值:这个方法返回这个 BigDecimal 对象的小数位数。
下面的程序说明了上述方法的工作原理:
程序 1:
// Java program to demonstrate the
// scale() method
import java.math.*;
public class Gfg {
public static void main(String[] args)
{
BigDecimal b1 = new BigDecimal("456.0");
BigDecimal b2 = new BigDecimal("-1.456");
// Assign the result of scale on
// BigDecimal Objects b1, b2 to int objects i1, i2
int i1 = b1.scale();
int i2 = b2.scale();
// Print the values of i1, i2;
System.out.println("The scale of " + b1 + " is " + i1);
System.out.println("The scale of " + b2 + " is " + i2);
}
}
输出:
The scale of 456.0 is 1
The scale of -1.456 is 3
程序二:
// Java program to demonstrate the
// scale() method
import java.math.*;
public class Gfg {
public static void main(String[] args)
{
BigDecimal b1 = new BigDecimal("745");
BigDecimal b2 = new BigDecimal("-174");
// Assign the result of scale on
// BigDecimal Objects b1, b2 to int objects i1, i2
int i1 = b1.scale();
int i2 = b2.scale();
// Print the values of i1, i2;
System.out.println("The scale of " + b1 + " is " + i1);
System.out.println("The scale of " + b2 + " is " + i2);
}
}
输出:
The scale of 745 is 0
The scale of -174 is 0
参考:https://docs . Oracle . com/javase/7/docs/API/Java/math/bigdecimal . html # scale()
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