Thread: JUnit initialization error

Hi all, I'm trying a simple JUnit test with Eclipse but I'm getting an initialization error (attached screenshot). Just looking for some help as to how to clear this error. Here are my classes:

IntegerCalculator

public class IntegerCalculator {
 
	private int amount = 0;
 
	public IntegerCalculator() {}
	public IntegerCalculator(int amount) {
		this.amount = amount;
	}
 
	public int getAmount() {
		return amount;
	}
 
	public void add(int val) {
		amount += val;	// This code is correct.
	}
 
	public void subtract(int val) {
		amount = val;	// This code is wrong.
	}
 
	public void divide(int val) {
		amount /= val;	// This code could generate and error.
	}
 
}

IntegerCalculatorTest

import static org.junit.Assert.*;
 
import org.junit.Before;
import org.junit.Test;
 
 
public class IntegerCalculatorTest {
 
	private IntegerCalculator n;
 
	@Before
	public void setUp() throws Exception {
		n = new IntegerCalculator(7);
	}
 
	@Test
	public void testAdd() {
		n.add(5);
		assertEquals("(7 + 5)", 12, n.getAmount());
	}
 
	@Test
	public void testSubtract() {
		n.subtract(3);
		assertEquals("(7 - 3)", 4, n.getAmount());
	}
 
	@Test
	public void testDivide() {
		n.divide(0);
		fail();
	}
 
}

Works great! Thanks!