Checks whether a given string only contains numeric characters and thus is a number. - Java java.lang

Java examples for java.lang:String Contain

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Description

Checks whether a given string only contains numeric characters and thus is a number.

Demo Code

/*******************************************************************************
 * Copyright (c) 2008 Dennis Schenk, Peter Siska.
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/epl-v10.html
 *
 * Contributors:/*from  w w w.ja  v a 2s . co m*/
 *     Dennis Schenk - initial implementation
 *     Peter Siska    - initial implementation
 *******************************************************************************/
//package com.java2s;

public class Main {
    public static void main(String[] argv) {
        String inputData = "java2s.com";
        System.out.println(isNumeric(inputData));
    }

    /**
     * Checks whether a given string only contains numeric characters and thus is a number.
     * @param inputData 
     * @return boolean True if a string has numeric characters only, false else.
     */
    public static final boolean isNumeric(final String inputData) {
        return inputData.matches("-?\\d+(.\\d+)?");
    }
}

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