Validate if string is a number : Convert from String « Data Type « Java






  1. Java
  2. Data Type
  3. Convert from String

Validate if string is a number

  

public class Main {
  public static boolean checkIfNumber(String in) {
    try {
      Integer.parseInt(in);
    } catch (NumberFormatException ex) {
      return false;
    }
    return true;
  }

  public static void main(String[] args) {

    System.out.println(checkIfNumber("ABC"));
    System.out.println(checkIfNumber("123123123123123"));
  }
}








Related examples in the same category

1.Parse a number using a NumberFormat
2.Convert from String to integer
3.Pass a string to the Integer class constructor and call the intValue()
4.Parse and format a number to octal
5.Parse and format a number to decimal
6.Parse and format to hexadecimal
7.Parse and format to arbitrary radix <= Character.MAX_RADIX
8.Decode string to integer
9.Convert string to an integer or number
10.Declaring Checked Exceptions
11.Converting a String to a byte Number
12.Converting a String to a short Number
13.Converting a String to a int(integer) Number
14.Value Of Demo