这单元定义的student是student（String id,String name）,而为什么老师在添加学生类过程中确是studentlist.add(new student(1+""+"小明")，为什么多添加了一个整型的参数却没有报错呢？

我认为正确的传参方式：

public void testStudentsort()

{

List<student>studentlist= new ArrayList<student>();

studentlist.add(new student("1","小明"));

studentlist.add(new student("2","小红"));

studentlist.add(new student("3","小绿"));

for (student student : studentlist) {

System.out.println("学生"+student.name);

}

}

老师添加学生类的代码

public void testStudentsort()

{

List<student>studentlist= new ArrayList<student>();

studentlist.add(new student(1+"","小明"));

studentlist.add(new student(2+"","小红"));

studentlist.add(new student(3+"","小绿"));

for (student student : studentlist) {

System.out.println("学生"+student.name);

}

}