javax @notnull is not working

Question

The following code is not throwing any error and it is a stand alone java program. Instead, if i pass null, it will print null in console. Please help me out, how to enable @notnull annotation.

import javax.validation.constraints.NotNull;

public class TestNotNull {

public void testNotNull(@NotNull(message = "name is compulsory") String name)
{
    System.out.println(name);
}

public static void main(String... args)
{
    TestNotNull testNotNull = new TestNotNull();

      testNotNull.testNotNull(null);


}

}

Answer 1

That won't work this way. You need to use a Bean Validation framework to trigger these annotations. The JVM itself cannot handle it. Please look at the JavaEE Tutorial for a short introduction to Java Bean Validation. A good implementation is the Hibernate Validator, which you can use in your application to validate annotated beans.

Hope that helps.