How do I set up and tear down tests in JUnit?

How do I set up and tear down tests in JUnit?

In JUnit, you can use the @Before annotation for setup methods and @After for teardown methods.

Can you give me an example of how to use these annotations?

Sure! Here's a simple example:

import org.junit.*;

public class MyTest {
    @Before
    public void setUp() {
        // Code to set up test environment
    }

    @After
    public void tearDown() {
        // Code to clean up after tests
    }

    @Test
    public void testSomething() {
        // Your test code here
    }
}

What if I need to set up resources that are expensive to create?

In that case, consider using @BeforeClass and @AfterClass for setup and teardown methods that run once for the entire class.