gistfile1.txt

Session s = openSession();
		s.beginTransaction();
		Apple a1 = new Apple();
		a1.name = "a1";
		Bug b1 = new Bug();
		b1.name = "b1";
		a1.bugs.add( b1 );
		s.persist( a1 );

		Apple a2 = new Apple();
		a2.name = "a2";
		Bug b2 = new Bug();
		b2.name = "b2";
		a2.bugs.add( b2 );
		s.persist( a2 );

		Apple a3 = new Apple();
		a3.name="a3";
		s.persist( a3 );

		s.getTransaction().commit();
		s.close();

		s = openSession(  );
		s.beginTransaction();

		Bug b = (Bug)s.get( Bug.class, b1.id );
		List apples = s.createQuery( "select a from Apple a join fetch a.bugs" ).list();
		for(Object obj:apples){
			Apple a = (Apple)obj;
			if(a.bugs.contains( b )){
				a.bugs.remove( b );
				if(a.bugs.isEmpty()){
					s.delete( a );
				}
			}
		}
		s.delete( b );
		s.getTransaction().commit();
		s.close();
---------------------
@Entity
public class Apple {
	@Id
	@GeneratedValue
	Long id;
	String name;
	@ManyToMany(cascade = { CascadeType.MERGE, CascadeType.PERSIST, CascadeType.REFRESH })
	@JoinTable(name = "APPLE_BUGS",
			joinColumns = @JoinColumn(name = "TID"),
			inverseJoinColumns = @JoinColumn(name = "EXID"))
	List<Bug> bugs = new ArrayList<Bug>();

}
-----------------------

/**
 * @author Strong Liu
 */
@Entity
public class Bug {
	@Id
	@GeneratedValue
	Long id;
	String name;

	@Override
	public boolean equals(Object o) {
		if ( this == o ) {
			return true;
		}
		if ( o == null || getClass() != o.getClass() ) {
			return false;
		}

		Bug bug = (Bug) o;

		if ( name != null ? !name.equals( bug.name ) : bug.name != null ) {
			return false;
		}

		return true;
	}

	@Override
	public int hashCode() {
		return name != null ? name.hashCode() : 0;
	}
}