Article complet: Devinette sur les ThreadLocal

public class Data {  
  private byte[] datas = null;  
  public Data(int sizeInMegs){  
    datas = new byte[1024*1024*sizeInMegs];  
  }  
}

public class A {  
  private ThreadLocal tl = new ThreadLocal();  
  Data data;  
  public A(Data data){  
    tl.set(this);  
    this.data=data;  
  }  
}

public class B {  
  private static ThreadLocal tl = new ThreadLocal();  
  private Data data;  
  public B(Data data){  
    this.data=data;  
    tl.set(this);  
  }  
}

public class C {  
  Data data;  
  ThreadLocal  tl = new ThreadLocal ();  
  public C(Data data){  
    tl.set(data);  
  }  
}  

  public static void main(String[] args) throws Exception { 
    final int size = ....; 
    if (args[0].equals("A")){ 
      while(true) 
        new A(new Data(size)); 
    } else if (args[0].equals("B")){ 
      while(true) 
        new B(new Data(size)); 
      
    } else if (args[0].equals("C")){ 
      while(true) 
        new C(new Data(size)); 
    } else if (args[0].equals("D")){ 
      while (true){ 
        new Thread(){ 
          @Override 
          public void run() { 
            new A(new Data(size)); 
          } 
          
        }.start(); 
        Thread.sleep(100); 
      } 
    } else if (args[0].equals("E")){ 
      while (true){ 
        new Thread(){ 
          @Override 
          public void run() { 
            new B(new Data(size)); 
          } 
          
        }.start(); 
        Thread.sleep(100); 
      } 
    }  
  }