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Java Program to Check if a String is Numeric
Example
You can check if a given string is Numeric as shown in the following program.
import java.util.Scanner; public class StringNumeric { public static void main(String[] args) { Scanner sc = new Scanner(System.in); System.out.println("Enter a string ::"); String str = sc.next(); boolean number = str.matches("-?\d+(\.\d+)?"); if(number) { System.out.println("Given string is a number"); } else { System.out.println("Given string is not a number"); } } }
Output
Enter a string :: 4245 Given string is a number
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