Java Number Format Pattern getNumberComma(String number)

Description

Insert comma to String

License

Apache License

Parameter

Parameter	Description
String	a parameter

Return

String

Declaration

public static String getNumberComma(String number) 

Method Source Code

//package com.java2s;
/**/*from w w  w.ja  v  a2  s. com*/
 * Copyright 2014 tgrape Inc.
 * 
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 * 
 *     http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

import java.text.DecimalFormat;
import java.text.NumberFormat;

public class Main {
    /**
     * Insert comma to String
     * @param String
     * @return String
     */
    public static String getNumberComma(String number) {
        NumberFormat fmt = NumberFormat.getInstance();
        String strNumber = fmt.format(Double.valueOf(number));
        return strNumber;
    }

    /**
     * Insert comma to Double
     * @param Double
     * @return String
     */
    public static String getNumberComma(Double number) {
        NumberFormat fmt = NumberFormat.getInstance();
        String strNumber = fmt.format(number);
        return strNumber;
    }

    /**
     * Insert comma to int
     * @param int
     * @return String
     */
    public static String getNumberComma(int number) {
        NumberFormat fmt = NumberFormat.getInstance();
        String strNumber = fmt.format(number);
        return strNumber;
    }

    /**
    * relation fuction to Currency format<br>
    * <font color="#0000ff">String formatted = Util.format("1234.67789", 2);<br>
    * formatted ==> "1234.68"
    * </font>
    * @param String<br>
    * @param int<br>
    * @return formatted double
    */
    public static double format(String str_number, int digits) {
        String pattern = "###.";
        double value = -1.;
        for (int i = 0; i < digits; i++) {
            pattern += "#";
        }
        try {
            value = Double.parseDouble(str_number);
        } catch (NumberFormatException e) {
            System.err.println("[Util] Bad Number String!!");
        }
        return customFormat(pattern, value);
    }

    /**
    * Use this method like this:<br>
    * <font color="#0000ff">String formatted = Util.format(1234.67789, 2);<br>
    * formatted ==> "1234.68"
    * </font>
    * @param numer<br>
    * @param digits<br>
    * @return formatted double
    */
    public static double format(double number, int digits) {
        return format("" + number, digits);
    }

    /**
    * This method actually does all for number formatting...<br>
    * @param pattern pattern to apply to the given double value<br>
    * @param value number to be formatted<br>
    * @return formatted double
    */
    private static double customFormat(String pattern, double value) {
        DecimalFormat myFormatter = new DecimalFormat(pattern);
        try {
            String output = myFormatter.format(value);
            return Double.parseDouble(output);
        } catch (NumberFormatException e) {
            System.err.println("[Util] at customFormat(..): NumberFormatException");
            return -1.0;
        }
    }
}

Related

1. getIntegerFormat(int maximumIntegerDigits)
2. getIntegerFormatter()
3. getIntegerNumberFormat()
4. getNeptusIntegerFormat()
5. getNumber(final Map map, final Object key)
6. getNumberFormat()
7. getNumberFormat()
8. getNumberFormat(BigDecimal num, final int digits)
9. getNumberFormat(double d)