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  1. import java.util.ArrayList;
  2.  
  3. class Rocket<T> {
  4.     private T value;
  5.  
  6.     public Rocket() {}
  7.     public Rocket( T value ) { this.value = value; }
  8.  
  9.     public void set(T value) { this.value = value; }
  10.     public T get() { return value; }
  11.  
  12.     @Override
  13.     public String toString() {
  14.         return getClass() + "[value=" + value.toString() + "]";
  15.     }
  16.     public boolean isEmpty() { return value == null; }
  17.     public void empty() { value = null; }
  18. }
  19.  
  20.  
  21. class Player {
  22.     public String name;
  23.     public Rocket<?> rightRocket;
  24.     public Rocket<?> leftRocket;
  25.  
  26.     public Player(String name, Rocket<?> rightRocket, Rocket<?> leftRocket) {
  27.         this.name = name;
  28.         this.rightRocket = rightRocket;
  29.         this.leftRocket = leftRocket;
  30.     }
  31.  
  32.     public String getName() {
  33.         return name;
  34.     }
  35.     public void setName(String name) {
  36.         this.name = name;
  37.     }
  38.     public Rocket<?> getRightRocket() {
  39.         return rightRocket;
  40.     }
  41.     public void setRightRocket(Rocket<?> rightRocket) {
  42.         this.rightRocket = rightRocket;
  43.     }
  44.     public Rocket<?> getLeftRocket() {
  45.         return leftRocket;
  46.     }
  47.     public void setLeftRocket(Rocket<?> leftRocket) {
  48.         this.leftRocket = leftRocket;
  49.     }
  50.  
  51.     @Override
  52.     public String toString() {
  53.         return getClass() + "[name=" + name + ", rightRocket=" + rightRocket.toString() + ", leftRocket=" + leftRocket.toString() + "]";
  54.     }
  55. }
  56.  
  57. class Ideone
  58. {
  59. 	public static void main(String[] args) {
  60.         Rocket<ArrayList<String>> rightRocket = new Rocket<>(
  61.             new ArrayList<>() {{
  62.                 add("BU");
  63.                 add("BU");
  64.                 add("BU");
  65.             }}
  66.         );
  67.         Player kleinerB = new Player(
  68.             "kleinerK",
  69.             rightRocket,
  70.             new Rocket<>(42)
  71.         );
  72.         System.out.println(kleinerB.toString());
  73.  
  74.         @SuppressWarnings("unchecked")
  75.         ArrayList<String> arrayList = (ArrayList<String>)kleinerB.getRightRocket().get();
  76.         for(String s : arrayList) {
  77.             System.out.print(s);
  78.         }
  79.         rightRocket.set(new ArrayList<>());
  80.     }
  81. }
Success #stdin #stdout 0.21s 49800KB
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class Player[name=kleinerK, rightRocket=class Rocket[value=[BU, BU, BU]], leftRocket=class Rocket[value=42]]
BUBUBU
https://ideone.com/ammNbG
language:
Java (HotSpot 12)
created:
2 years ago
visibility:
secret

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