Main.java Source code

Introduction

Here is the source code for Main.java

Source

//package com.java2s;

public class Main {
    public static boolean isNum(String str) {
        boolean ret = false;
        if (str != null) {
            for (int i = str.length(); --i >= 0;) {
                if (!Character.isDigit(str.charAt(i))) {
                    ret = false;
                    break;
                }
            }
            ret = true;

        }
        return ret;
    }
}