java - 如何将输入字符串 “BBBB” 与上面 ArrayList 中的学校进行比较？

Question

假设我有一个 ArrayList<Student>包含 4 Students(name , city, school) 。例如:

 1. John   Nevada   BBBB
 2. Mary   Ander    AAAA
 3. Winn   Arcata   CCCC
 4. Ty     Artes    BBBB

如果用户输入“BBBB”，则显示::

 1. John    Nevada   BBBB
 2. Ty      Artes    BBBB

我的问题是如何将输入字符串“BBBB”与上面ArrayList中的学校进行比较？感谢你们提供的任何帮助!

public class Student
{
    private String name;
    private String city;
    private String school;

    /**
     * Constructor for objects of class Student
     */
    public Student(String name, String city, String school)
    {
       this.name = name;
       this.city = city;
       this.school = school;
    }

    public String getSchool(String school)
    {
        return this.school = school;
    }

     public String toString()
    {
        return  "Name: " + name + "\tCity: " +city+ "\tSchool: "+school;
    }


}


public class AllStudent
{
    // instance variables - replace the example below with your own
    private ArrayList<Student> listStudent = new ArrayList<Student>();

    /**
     * Constructor for objects of class AllStudent
     */
    public AllStudent() throws IOException
    {

        //variables
        // read an input file and save it as an Arraylist
        fileScan = new Scanner (new File("students.txt");
        while(fileScan.hasNext())
        {
            //.......
            listStudent.add(new Student(name,city,school);
     }
     //now let user enter a school, the display name, city, school of that student.
     //i am expecting something like below...
     public void displayStudentBasedOnSchool(String school)
     {
       for (i = 0; i < listStudent.size(); i++)
       {
        //what should i put i here to comapre in input School with school in the listStudent>
        }
     }
}

Answer 1

假设您的学生的模型如下(AAAA、BBBB 值存储在 blah 字段中):

public class Student {

  private String name;
  private String state;
  private String blah;

  //getters & setters..

}

最简单(不是最有效的方法)就是循环数组列表并将查询字符串与 blah 字段的值进行比较

for(Student s : studentList) {
  if(s.getBlah().equals(queryString)) {
    // match!..
  }
}