Java Float Number Format formatFloat(float num, int width, int precision)

Description

format Float

License

CDDL license

Declaration

public final static String formatFloat(float num, int width, int precision) 

Method Source Code

//package com.java2s;
//License from project: CDDL license 

public class Main {
    final static String spaces = new String("                                            ");

    public final static String formatFloat(float num, int width, int precision) {
        return formatReal(String.valueOf(num), width, precision);
    }//  ww  w . j  a v  a  2s.  c  om

    public static String formatReal(String s, int width, int precision) {
        int dec = s.indexOf('.');
        if (dec > 0) {
            int len = s.length();
            while (len > dec && s.charAt(len - 1) == '0')
                len--; // chop trailing 00
            if (len - 1 == dec || precision == 0)
                len = dec; // drop .
            else if (precision > 0) {
                dec += precision + 1;
                if (dec < len)
                    len = dec;
            }
            s = s.substring(0, len);
        }
        return formatString(s, width);
    }

    public static String formatString(String s, int width) {
        int len = s.length();
        if (width > len)
            s = spaces.substring(0, width - len) + s;
        else if (-width > len)
            s = s + spaces.substring(0, (-width) - len);
        return s;
    }
}

Related

1. formatFloat(double num)
2. formatFloat(double number, int precision)
3. formatFloat(double value, int decimals)
4. formatFloat(float f)
5. formatFloat(float input, int numDecimals)
6. formatFloat(float val)
7. formatFloat(String value)