added Übung "Lok_Waggon" in OOP3_4

Uebungen/OOP_3und4/src/lok_waggon/Lok.java

+package lok_waggon;
+
+public class Lok {
+
+    private int lokNummer;
+    private int zugKraft = 60_000;
+    public Wagon naechsterWagon;
+
+
+    public Lok(int lokNummer) {
+        this.lokNummer = lokNummer;
+    }
+
+    @Override
+    public Lok clone() {
+        Lok lok = new Lok(lokNummer);
+        if (naechsterWagon != null) {
+            lok.naechsterWagon = naechsterWagon.clone();
+        }
+        return lok;
+
+    }
+
+    @Override
+    public String toString() {
+        return "Lok-Nummer: " + lokNummer;
+    }
+
+    @Override
+    public boolean equals(Object obj) {
+        if (obj == null || !(obj instanceof Wagon )){
+            return false;
+        }
+        Lok lok = (Lok) obj;
+        if (lokNummer != lokNummer) {
+            return false;
+        } else return true;
+    }
+}

Uebungen/OOP_3und4/src/lok_waggon/Programm.java

+package lok_waggon;
+
+public class Programm {
+
+    final static int WAGONS = 5;
+
+    public static void main(String[] args) {
+
+
+        Lok lok1 = new Lok(1);
+        lok1.naechsterWagon = new Wagon(1, 500, 1000);
+        Wagon wagon = lok1.naechsterWagon;
+        for (int i = 2; i <= WAGONS; i++) {
+            wagon.naechsterWagon = new Wagon(i, 500, 1000);
+            wagon = wagon.naechsterWagon;
+        }
+
+
+        printZug(lok1);
+        Lok lok2 = lok1.clone();
+        printZug(lok2);
+
+
+        wagon = lok1.naechsterWagon;
+        while (wagon.getWagonNummer() != 4) {
+            wagon = wagon.naechsterWagon;
+        }
+        wagon.naechsterWagon = null;
+
+        printZug(lok1);
+        printZug(lok2);
+
+
+        System.out.println("Vergleich von Lok#1 und Lok#2 ist: " + lok1.equals(lok2));
+
+        Lok lok3 = lok1.clone();
+
+        System.out.println("Vergleich von Lok#3 und Lok#1 ist: " + lok3.equals(lok1));
+
+    }
+
+
+    private static void printZug(Lok lok) {
+        System.out.print(lok + " <=> ");
+        Wagon wagon = lok.naechsterWagon;
+        while (wagon != null) {
+            System.out.print(wagon + " <=> ");
+            wagon = wagon.naechsterWagon;
+        }
+        System.out.println();
+    }
+}

Uebungen/OOP_3und4/src/lok_waggon/Wagon.java

+package lok_waggon;
+
+public class Wagon implements Cloneable {
+
+
+    private int wagonNummer;
+    private int maximalLast = 5000;
+    private int beladung;
+    public Wagon naechsterWagon;
+
+
+    public int getWagonNummer() {
+        return wagonNummer;
+    }
+
+    public Wagon(int wagonNummer, int maximalLast, int beladung) {
+        this.wagonNummer = wagonNummer;
+        this.maximalLast = maximalLast;
+        this.beladung = beladung;
+        naechsterWagon = null;
+    }
+
+    @Override
+    public Wagon clone() {
+        Wagon wagon = new Wagon(wagonNummer, maximalLast, beladung);
+        if (naechsterWagon != null) {
+            wagon.naechsterWagon = wagon.clone();
+        }
+        return naechsterWagon;
+    }
+
+    @Override
+    public String toString() {
+        return "Wagon-Nummer: " + wagonNummer;
+    }
+
+
+    @Override
+    public boolean equals(Object obj) {
+        if (obj == null || !(obj instanceof Wagon)) {
+            return false;
+        }
+        Wagon wagon = (Wagon) obj;
+        if (wagonNummer != wagonNummer) {
+            return false;
+        } else return true;
+    }
+}