BigDecimal类toPlainString()方法 (BigDecimal Class toPlainString() method)

• toPlainString() method is available in java.math package.

  toPlainString()方法在java.math包中可用。

• toPlainString() method is used to represent string denotation of this BigDecimal without the help of any notation and no exponent is required to denote BigDecimal as a String.

  toPlainString()方法用于在无需任何表示法的情况下表示此BigDecimal的字符串表示形式，并且不需要将BigDecimal表示为String的指数。

  • Case 1: What happens when values with scale > 0 (i.e. +ve)
  • Case 2: What happens when values with scale < 0 (i.e. -ve)
  • Case 3: What happens when values with scale = 0 (i.e. 0)

• The resulting string is prefixed by the negative (-) sign when the unscaled value is negative otherwise no sign is prefixed when the unscaled value is 0 or positive.

  当未缩放的值是负数时，结果字符串以负号(-)为前缀，否则在未缩放的值为0或正数时将没有符号前缀。

• toPlainString() method is a non-static method, it is accessible with the class object only and if we try to access the method with the class name then we will get an error.

  toPlainString()方法是一个非静态方法，仅可通过类对象访问，如果尝试使用类名访问该方法，则会收到错误消息。

• toPlainString() method does not throw an exception at the time of representing this BigDecimal as a String.

  在将此BigDecimal表示为String时， toPlainString()方法不会引发异常。

Syntax:

句法：

    public String toPlainString();

Parameter(s):

参数：

• It does not accept any parameter.

  它不接受任何参数。

Return value:

返回值：

The return type of this method is String, it returns string denotation of this BigDecimal object with no exponent is required.

此方法的返回类型为String ，它返回此BigDecimal对象的字符串表示形式，不需要任何指数。

Example:

例：

// Java program to demonstrate the example 
// of String toPlainString() method of BigDecimal

import java.math.*;

public class ToPlainStringOfBD {
    public static void main(String args[]) {
        // Initializes two variables -  
        // String type
        String str1 = "12E+5";
        String str2 = "1200000";

        // Initializes two BigDecimal objects  
        BigDecimal b_dec1 = new BigDecimal(str1);
        BigDecimal b_dec2 = new BigDecimal(str2);

        // By using toPlainString() method is 
        // used to represent this BigDecimal b_dec1 as
        // a String without using the engineering notation
        String str_conv = b_dec1.toPlainString();
        System.out.println("b_dec1.toPlainString(): " + str_conv);

        // By using toPlainString() method is 
        // used to represent this BigDecimal b_dec2 as
        // a String without using the engineering notation
        str_conv = b_dec2.toPlainString();
        System.out.println("b_dec2.toPlainString(): " + str_conv);
    }
}

Output

输出量

b_dec1.toPlainString(): 1200000
b_dec2.toPlainString(): 1200000

翻译自: https://www.includehelp.com/java/bigdecimal-toplainstring-method-with-example.aspx