Look for a warning that the compiler must be 5.0 compliant. Click on the link and change the compliance level to 5.0.

You should be back to the previous dialog box. Look for a warning that says JUnit 4 is not on the build path. Click on the "Click Here." This will should remove the warning and add JUnit 4 under Latitude project.

import org.junit.Test;   // need to import for JUnit 4.0
import static org.junit.Assert.assertEquals;
import org.junit.After;   // need if use @After
import org.junit.Before;  // need if use @Before
import org.junit.Ignore;  // need if use @Ignore

Note that Eclipse flags with a litle light bulb a warning that org.junit.After and orig.junit.Ignore are not used in this example.

  private Latitude N0;
  private Latitude N90;

  // Done before any tests.  Method name can be anything.
  @Before public void setUp1() { 

    N0 = new Latitude();
    N90 = new Latitude(90.0, 0.0, 0.0, "N");
  }

  // Each method with tests needs @Test
  @Test public void testLatitudeConst() {

    // O degrees N from default constructor should equal 
    // 0 degrees N from 4 arg constructor
    Latitude N0expected = new Latitude(0.0, 0.0, 0.0, "N");
    // check if true with assert(); 
    // Must have -ea option on java command or asserts are ignored.
    assert(N0.equals( N0expected));
    // 0 degrees N should be equal to 0 degrees S.
    Latitude S0expected = new Latitude(0.0, 0.0, 0.0, "S");
    // check if equals with assertEquals()
    assertEquals(N0, S0expected);
  }

Look below the JUnit report and find the Failure Trace. It will show the line in the source where the error was detected. If you double-click on this line, it will highlight that line in the source.