Java - Write code to Make the verdict string specified is whether the numerical value.

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Requirements

Write code to Make the verdict string specified is whether the numerical value.

Return true if the string is a number, false otherwise

Hint

Use Double.parseDouble method()

Demo

//package com.book2s;

public class Main {
    public static void main(String[] argv) {
        String value = "book2s.com";
        System.out.println(isNumber(value));
    }//from  w  w  w.  ja  va 2s.com

    /**
     * Make the verdict string specified is whether the numerical value.<br/>
     * 
     * @param value
     *            The target string
     * @return If the specified string is a number, and return the {@code true}
     */
    public static boolean isNumber(final String value) {
        try {
            Double.parseDouble(value);
            return true;
        } catch (NumberFormatException e) {
            return false;
        }
    }
}