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Aufgabe 1:
Die Testklassen CircleTest und RectangleTest findet ihr unter Aufgabe 2!
Circle.java:
public class Circle extends AbstractShape{
private double radius;
Circle(String name, double radius){
super(name);
this.radius=radius;
}
public double getArea(){
double temp = Math.PI * radius * radius;
return temp;
}
}
Rectangle.java:
public class Rectangle extends AbstractShape{
private double laenge, breite;
Rectangle(String name, double laenge, double breite){
super(name);
this.laenge=laenge;
this.breite=breite;
}
public double getArea(){
double temp = laenge * breite;
return temp;
}
}
AbstractShape.java:
public String toString() {
return getClass().getName()+”.”+ name;
}
Aufgabe 2:
AbstractShapeTest.java:
import junit.framework.TestCase;
public class AbstractShapeTest extends TestCase {
protected IShape s1;
protected IShape s2;
protected IShape s3;
public void testArea() {
double area13 = Math.PI * 10.5 * 10.5;
double area2 = Math.PI * 11.0 * 11.0;
assertEquals(area13, s1.getArea(), 1e-7);
assertEquals(area2, s2.getArea(), 1e-7);
assertEquals(area13, s3.getArea(), 1e-7);
}
public void testName() {
assertEquals(“a”, s1.getName());
assertEquals(“b”, s2.getName());
assertEquals(“c”, s3.getName());
}
public void testCompare() {
assertEquals(0, s1.compareTo(s3));
assertEquals(0, s3.compareTo(s1));
assertTrue(s1.compareTo(s2) < 0);
assertTrue(s2.compareTo(s1) > 0);
assertTrue(s3.compareTo(s2) < 0);
assertTrue(s2.compareTo(s3) > 0);
}
public void testEquals() {
assertFalse(s1.equals(s2));
assertFalse(s1.equals(s3));
assertFalse(s3.equals(s2));
}
public void testToString() {
String className = s1.getClass().getName();
assertEquals(className+”.a”, s1.toString());
assertEquals(className+”.b”, s2.toString());
assertEquals(className+”.c”, s3.toString());
}
}
CircleTest.java:
public class CircleTest extends AbstractShapeTest {
public void setUp() {
s1 = new Circle(“a”, 10.5);
s2 = new Circle(“b”, 11.0);
s3 = new Circle(“c”, 10.5);
}
}
RectangleTest.java:
public class RectangleTest extends AbstractShapeTest {
public void setUp() {
s1 = new Rectangle(“a”, Math.PI, 10.5 * 10.5);
s2 = new Rectangle(“b”, Math.PI, 11.0 * 11.0);
s3 = new Rectangle(“c”, Math.PI, 10.5 * 10.5);
}
}
Aufgabe 3:
ShapeNameComparator.java:
import java.util.Comparator;
public class ShapeNameComparator implements Comparator{
public int compare(Object arg0, Object arg1) {
return (((IShape)arg0).getName().compareTo(((IShape)arg1).getName()));
}
}
Tags: Praktikum, Programmierung, Studium