Tests cloning to see if destination of references are also cloned : Clone « Class « Java

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Java » Class » CloneScreenshots 
Tests cloning to see if destination of references are also cloned
Tests cloning to see if destination of references are also cloned
    

// : appendixa:Snake.java
// Tests cloning to see if destination
// of references are also cloned.
// From 'Thinking in Java, 3rd ed.' (c) Bruce Eckel 2002
// www.BruceEckel.com. See copyright notice in CopyRight.txt.

public class Snake implements Cloneable {

  private Snake next;

  private char c;

  // Value of i == number of segments
  public Snake(int i, char x) {
    c = x;
    if (--i > 0)
      next = new Snake(i, (char) (x + 1));
  }

  public void increment() {
    c++;
    if (next != null)
      next.increment();
  }

  public String toString() {
    String s = ":" + c;
    if (next != null)
      s += next.toString();
    return s;
  }

  public Object clone() {
    Object o = null;
    try {
      o = super.clone();
    catch (CloneNotSupportedException e) {
      System.err.println("Snake can't clone");
    }
    return o;
  }

  public static void main(String[] args) {
    Snake s = new Snake(5'a');
    System.out.println("s = " + s);
    Snake s2 = (Snakes.clone();
    System.out.println("s2 = " + s2);
    s.increment();
    System.out.println("after s.increment, s2 = " + s2);
  }
///:~


           
         
    
    
    
  
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