Checks if a String contains a valid numeric, in this definition either 1 or more digits or 0 or more digits, followed by a dot (.), followed by 1 or more digits. - Java java.lang

Java examples for java.lang:String Contain

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Description

Checks if a String contains a valid numeric, in this definition either 1 or more digits or 0 or more digits, followed by a dot (.), followed by 1 or more digits.

Demo Code

//package com.java2s;

public class Main {
    public static void main(String[] argv) {
        String string = "java2s.com";
        System.out.println(isNumeric(string));
    }/*from  w  ww . j a va 2s. com*/

    /**
     * Checks if a {@link String} contains a valid numeric, in this definition either
     * <ul>
     * <li>1 or more digits <i>or</i></li>
     * <li>0 or more digits, followed by a dot (.), followed by 1 or more digits.
     * </ul>
     * 
     * @param string
     *            The {@link String} to test.
     * @return {@code true} if it is a valid numeric, {@code false} otherwise.
     */
    public static boolean isNumeric(String string) {
        return string.matches("([0-9]*\\.)?[0-9]+");
    }
}

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