10 .  public  Object m() {
 11 .   Object o =  new   Float ( 3 .14F);
 12 .   Object[] oa =  new  Object[ 1 ];
 13 .   oa[ 0 ] = o;
 14 .   o =  null ;
 15 .    return  oa[ 0 ];
 16 . }

 1 .  class  TestA {
 2 .   TestB b;
 3 .   TestA() {
 4 .     b =  new  TestB( this );
 5 .   }
 6 . }
 7 .  class  TestB {
 8 .   TestA a;
 9 .   TestB(TestA a) {
 10 .     this .a = a;
 11 .  }
 12 . }
 13 .  class  TestAll {
 14 .    public   static   void  main(String[] args) {
 15 .      new  TestAll().makeThings();
 16 .     //..code continues on
 17 .   }
 18 .    void  makeThings() {
 19 .     TestA test =  new  TestA();
 20 .   }
 21 . }

 1 .  class  Bar{}

 1 .  class  Test{
 2 .   Bar doBar{
 3 .     Bar b =  new  Bar();
 4 .      return  b;
 5 .   }
 6 .    public   static   void  main(String[] args){
 7 .     Test t =  new  Test();
 8 .     Bar newBar = t.doBar();
 9 .     System.out.println("newBar");
 10 .    newBar =  new  Bar();
 11 .    System.out.println("finished");
 12 .  }
 13 .}

 1 .  public   class  X  implements  Runnable {
 2 .    private   int  x;
 3 .    private   int  y;
 4 .   
 5 .    public   static   void  main(String[] args){
 6 .     X that =  new  X();
 7 .     ( new  Thread(that)).start();
 8 .     ( new  Thread(that)).start();
 9 .   }
 10 .
 11 .   public   void  run(){
 12 .     for  (;;){
 13 .      x++;
 14 .      y++;
 15 .    }
 16 .  }
 17 . }