Main.java Source code

Introduction

Here is the source code for Main.java

Source

public class Main {
    public static boolean containsOnlyNumbers(String str) {
        for (int i = 0; i < str.length(); i++) {
            if (!Character.isDigit(str.charAt(i)))
                return false;
        }
        return true;
    }

    public static void main(String[] args) {
        System.out.println(containsOnlyNumbers("123456"));
        System.out.println(containsOnlyNumbers("123abc456"));
    }
}
/*
true
false
*/