Java BigDecimal Format formatFloat0(String value, int n)

Description

format Float

License

Apache License

Declaration

public static String formatFloat0(String value, int n) 

Method Source Code

//package com.java2s;
//License from project: Apache License 

import java.math.BigDecimal;

import java.util.regex.Matcher;
import java.util.regex.Pattern;

public class Main {
    public static final Pattern pattern = Pattern.compile("[\\+\\-]?[\\d]+([\\.][\\d]*)?([Ee][+-]?[\\d]+)?$");

    public static String formatFloat0(String value, int n) {
        if (null != value && value.contains(".")) {
            if (isNumeric(value)) {
                try {
                    BigDecimal decimal = new BigDecimal(value);
                    BigDecimal setScale = decimal.setScale(n, BigDecimal.ROUND_HALF_DOWN);
                    return setScale.toPlainString();
                } catch (Exception e) {
                }//from  www. java 2 s. c  o m
            }
        }
        return value;
    }

    private static boolean isNumeric(String str) {
        Matcher isNum = pattern.matcher(str);
        if (!isNum.matches()) {
            return false;
        }
        return true;
    }
}

Related

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2. formatDoubleValue(int medianAfterTheDecimalPoint, String doubleStringValue)
3. formate(BigDecimal amount)
4. formatFAAssertRatioWithoutPercent(BigDecimal value)
5. formatFileSize(double size)
6. formatForPercentage(BigDecimal value)
7. formatManey(BigDecimal date)
8. formatMoney(BigDecimal money, int scale, double divisor)
9. formatMoney(long value)