Question:What is the difference between an Interface and an Abstract class? ? Question:What is the purpose of garbage collection in Java, and when is it used? ?Question:?Describe synchronization in respect to multithreading.Question:?Explain different way
更新语句String sql = "update student set num=?,name=?,birthday=?,score=?,password=? where id=?";ps = conn.prepareStatement(sql);ps.setString(1, student.getNum());ps.setString(2, student.getName());ps.setString(3, st