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Check whether the entered value is a digit or not in Java
To check whether the entered value is a digit or not in Java, use the Character.isDigit() method.
We have a character to be checked.
char val = '5';
Now let us use the Character.isDigit() method.
if (Character.isDigit(val)) { System.out.println("Character is a digit!"); } else { System.out.println("Character is not a digit!"); }
Let us see the complete example now to check for Uppercase in Java.
Example
public class Demo { public static void main(String []args) { System.out.println("Checking for digit..."); char val = '5'; System.out.println("Value: "+val); if (Character.isDigit(val)) { System.out.println("Character is a digit!"); }else { System.out.println("Character is not a digit!"); } } }
Output
Checking for digit... Value: 5 Character is a digit!
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