Question

How to read lines from text file into ArrayList in Java

Answer 1

package javaapplication1;

import java.io.BufferedReader;
import java.io.FileReader;
import java.util.ArrayList;

public class JavaApplication1 {

    public static void main(String[] args) {

        try {

            ArrayList<String> list = new ArrayList<>();

            try (BufferedReader reader = new BufferedReader(new FileReader("d:\\data.txt"))) {
                while (true) {
                    String line = reader.readLine();
                    if (line == null) {
                        break;
                    }
                    list.add(line);
                }
            }

            System.out.println("ArrayList size: " + list.size());

            for (String s : list) {
                System.out.println(s);
            }

        } catch (Exception e) {
            System.out.println(e.toString());
        }
    }
}

/*
                   
run:
      
ArrayList size: 3
java,javascript
c,c++,c#
php,html,css
          
 */

 

70+ SQL courses for beginners and professionals