The following is the data that you can add to your input file (as an example). Notice that the first line is going to be a line representing your own hobbies. In my case, it is the Vitaly,table tennis,chess,hacking line. Your goal is to create a class called Student. Every Student will contain a name (String) and an ArrayList<String> storing hobbies. Then, you will add all those students from the file into an ArrayList<Student>, with each Student having a separate name and ArrayList of hobbies. Here is an example file containing students (the first line will always represent yourself). NOTE: eventually, we will have a different file containing all our real names and hobbies so that we could find out with how many people each of us share the same hobby. Vitaly,table tennis,chess,hacking Sean,cooking,guitar,rainbow six Nolan,gym,piano,reading,video games Jack,cooking,swimming,music Ray,piano,video games,volleyball Emily,crochet,drawing,gardening,tuba,violin Hudson,anime,video games,trumpet Matt,piano,Reading,video games,traveling Alex,swimming,video games,saxophone Roman,piano,dancing,art Teddy,chess,lifting,swimming Sarah,baking,reading,singing,theatre Maya,violin,knitting,reading,billiards Amy,art,gaming,guitar,table tennis Daniel,video games,tennis,soccer,biking,trumpet Derek,cooking,flute,gaming,swimming,table tennis Daisey,video games,guitar,cleaning,drawing,animated shows,reading,shopping Lily,flute,ocarina,video games,baking Stella,roller skating,sudoku,watching baseball,harp Sophie,viola,ukulele,piano,video games
时间: 2024-03-05 21:06:37 浏览: 24
Based on the given information, I would suggest creating a class called Student with two instance variables: a String for the student's name and an ArrayList<String> for their hobbies.
Then, to read the data from the file and add it to an ArrayList<Student>, you could do something like this:
1. Create an empty ArrayList<Student>.
2. Read the first line of the file and split it into a String for the name and an ArrayList<String> for the hobbies.
3. Create a new Student object with the name and hobbies from the first line and add it to the ArrayList.
4. Use a loop to read the rest of the lines from the file, create a new Student object for each one, and add it to the ArrayList.
5. Once you have read all the lines from the file, you should have an ArrayList<Student> containing all the students and their hobbies.
Here's some example code to help you get started:
```
import java.io.File;
import java.io.FileNotFoundException;
import java.util.ArrayList;
import java.util.Scanner;
public class Student {
private String name;
private ArrayList<String> hobbies;
public Student(String name, ArrayList<String> hobbies) {
this.name = name;
this.hobbies = hobbies;
}
// Getters and setters for name and hobbies
public static void main(String[] args) {
ArrayList<Student> students = new ArrayList<Student>();
try {
File file = new File("students.txt");
Scanner scanner = new Scanner(file);
// Read and process the first line
String[] firstLine = scanner.nextLine().split(",");
String name = firstLine[0];
ArrayList<String> hobbies = new ArrayList<String>();
for (int i = 1; i < firstLine.length; i++) {
hobbies.add(firstLine[i]);
}
students.add(new Student(name, hobbies));
// Read and process the rest of the lines
while (scanner.hasNextLine()) {
String[] line = scanner.nextLine().split(",");
name = line[0];
hobbies = new ArrayList<String>();
for (int i = 1; i < line.length; i++) {
hobbies.add(line[i]);
}
students.add(new Student(name, hobbies));
}
scanner.close();
} catch (FileNotFoundException e) {
System.out.println("File not found!");
}
// Now you have an ArrayList<Student> containing all the students and their hobbies
}
}
```