public static void queryStudent(ArrayList<Student> list){ if(list.size()==0){ System.out.println("当前无学生信息,请添加后再查询"); return; } System.out.println("id\t\t姓名\t\t年龄\t\t家庭住址"); //当代码执行到这里 for (int i = 0; i < list.size(); i++) { Student stu=list.get(i); System.out.println(stu.getId()+"\t"+stu.getName()+"\t"+stu.getAge()+"\t"+stu.getAddress()); } }