两个list如何合并成一个数组

Question

public Object[] query(Object[] a){
Session session=sessionFactory.getCurrentSession();
Query query =session.createQuery("from subject");
if(query.list().isEmpty()){
List list1=new ArrayList();
List list=query.list();
for (subject subject : list) {
Integer id= subject.getId();

            Query query1=session.createQuery("from option where subjectid =:id");
            query1.setString("id", ""+id+"");
            Integer preson =(Integer) query1.uniqueResult();
            list1.add(preson);
        }




    }
}
我想把list和list1合并成一个请问下怎么合并

Answer 1

http://blog.csdn.net/onlyonecoder/article/details/9358473