preparing trains

src/main/java/de/srsoftware/web4rail/moving/Car.java

@@ -0,0 +1,14 @@
+package de.srsoftware.web4rail.moving;
+
+public class Car {
+	public int length;
+	private String name;
+	
+	public Car(String name) {
+		this.name = name;
+	}
+	
+	String name(){
+		return name;
+	}
+}

src/main/java/de/srsoftware/web4rail/moving/Locomotive.java

@@ -0,0 +1,8 @@
+package de.srsoftware.web4rail.moving;
+
+public class Locomotive extends Car {
+
+	public Locomotive(String name) {
+		super(name);
+	}
+}

src/main/java/de/srsoftware/web4rail/moving/Train.java

@@ -0,0 +1,31 @@
+package de.srsoftware.web4rail.moving;
+
+import java.util.Vector;
+
+public class Train {
+	private Vector<Locomotive> locos = new Vector<Locomotive>();
+	private Vector<Car> cars = new Vector<Car>();
+	private String name = null;
+	
+	public Train(Locomotive loco) {
+		add(loco);
+	}
+
+	public void add(Car car) {
+		if (car == null) return;
+		if (car instanceof Locomotive) {
+			locos.add((Locomotive) car);
+		} else cars.add(car);		
+	}
+	
+	public int length() {
+		int result = 0;		
+		for (Locomotive loco : locos) result += loco.length;
+		for (Car car : cars) result += car.length;
+		return result;
+	}
+
+	public String name() {
+		return name != null ? name : locos.firstElement().name();
+	}
+}