Main.java Source code

Introduction

Here is the source code for Main.java

Source

public class Main {
    public static void main(String[] args) {
        boolean flag = true;
        String str = "123";

        for (int i = 0; i < str.length(); i++) {
            if (str.charAt(i) > 48 && str.charAt(i) < 58) {
                flag = false;
                break;
            }
        }
        if (flag == true) {
            System.out.println("String is a valid String..");
        } else {
            System.out.println("String contains number");
        }
    }
}