Name validation using Java Regular Expressions


The name can be validated using the java.util.regex.Pattern.matches() method. This method matches the regular expression for the name and the given input name and returns true if they match and false otherwise.

A program that demonstrates this is given as follows:

Example

 Live Demo

public class Demo {
   public static void main(String args[]) {
      String name = "John Harry Smith";
      String regexName = "\p{Upper}(\p{Lower}+\s?)";
      String patternName = "(" + regexName + "){2,3}";
      System.out.println("The name is: " + name);
      System.out.println("Is the above name valid? " + name.matches(patternName));
   }
}

Output

The name is: John Harry Smith
Is the above name valid? true

Now let us understand the above program.

The name is printed. The Pattern.matches() method matches the regular expression for the name and the given input name and the result is printed. A code snippet which demonstrates this is as follows:

String name = "John Harry Smith";
String regexName = "\p{Upper}(\p{Lower}+\s?)";
String patternName = "(" + regexName + "){2,3}";
System.out.println("The name is: " + name);
System.out.println("Is the above name valid? " + name.matches(patternName));

Updated on: 30-Jul-2019

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