Java Decimal Format padToMinWidth(double num, int minWidth)

Description

pad To Min Width

License

Open Source License

Declaration

public static String padToMinWidth(double num, int minWidth) 

Method Source Code

//package com.java2s;
/*//from  w  w  w  .jav a  2  s  . c  om
 * Robonobo Common Utils
 * Copyright (C) 2008 Will Morton (macavity@well.com) & Ray Hilton (ray@wirestorm.net)
    
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version 2
 * of the License, or (at your option) any later version.
    
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
    
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
 */

import java.text.NumberFormat;

public class Main {
    public static String padToMinWidth(double num, int minWidth) {
        NumberFormat nf = NumberFormat.getNumberInstance();
        int intDigits = numDigits((int) num);
        if (intDigits >= minWidth)
            nf.setMaximumFractionDigits(0);
        else {
            boolean hasFracComponent = (int) num != num;
            if (hasFracComponent) {
                nf.setMaximumFractionDigits(minWidth - intDigits);
                nf.setMinimumFractionDigits(minWidth - intDigits);
            }
        }
        return nf.format(num);
    }

    public static int numDigits(long val) {
        // This seems a bit ugly, there must be a more elegant way
        String s = String.valueOf(val);
        return s.length();
    }
}

Related

1. Julian_Cal(double JDN)
2. listToString(List list)
3. numToString(double num)
4. pad(double n)
5. padding(final double number)
6. prettyPrintLatLon(double coord, boolean isCoordKindLat)
7. print(double[] y)
8. printAlpha(double a[])
9. printAngle(double angle)