Java Regex Number Validate isNumber(String s)

Description

Returns true if input string is numeric and false otherwise

License

Apache License

Parameter

Parameter	Description
s	the string to test on numeric value

Return

true if the string is a number; false otherwise.

Declaration

public static boolean isNumber(String s) 

Method Source Code

//package com.java2s;
/*//ww  w .ja va2  s  .c om
 * Copyright 2007-2014 Mikhail Khodonov
 *
 * 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.
 *
 * $Id$
 */

import java.util.regex.Pattern;

public class Main {
    private static Pattern _numPattern = Pattern.compile("-?\\d+(\\.\\d+)?");

    /**
     * Returns true if input string is numeric and false otherwise
     * 
     * @param s
     *            the string to test on numeric value
     * 
     * @return true if the string is a number; false otherwise.
     */
    public static boolean isNumber(String s) {
        return (_numPattern.matcher(s).matches());
    }
}

Related

1. isNum(String str)
2. isNum(String str)
3. isNumber(String data)
4. isNumber(String number)
5. isNumber(String s)
6. isNumber(String s, boolean[] realnum)
7. isNumber(String str)
8. isNumber(String str)