Why do we need to import "org.junit.Assert " static?

Question

I tried to enter assertTrue into code and found that i need to import junit lib.

In this code,

import static org.junit.Assert.assertTrue;
//import org.junit.Assert;   with this didnt worked

public class Person implements Serializable {
       // some code there

        assertTrue(p2.getAge() == p.getAge());
        assertTrue(p2.getName().equals(p.getName()));
}

So i tried with import org.junit.Assert; but that asserTrue didnt worked then I tried with import static org.junit.Assert.assertTrue; and then it works. I need explanation why need static ?

you don't "have to", you can also just call the static method without a static import — Stultuske, Oct 04 '19 at 06:37
no need, imports are optional, just use `org.junit.Assert.assertTrue(p2.getAge() == p.getAge());`, that is, the fully qualified name of the class/method... clearly it looks *better*, more readable, using the import — user85421, Oct 04 '19 at 06:45

score 3 · Accepted Answer · answered Oct 04 '19 at 06:40

With the static keyword you can use the methods without qualifying the class the method belongs to. See this relevant part in the documentation:

The static import construct allows unqualified access to static members without inheriting from the type containing the static members. Instead, the program imports the members [...]

Static import

Why do we need to import "org.junit.Assert " static?

1 Answers1