从文本文件读取到文本字段Java

Question

I have a text file which stores data about a user, from username, password and other details. In the text file, each user's data is stored in one line and separated using ",". I am trying to read from the file and list all the usernames. usernames are first one the line

In the following code, I manage to read and output, but only the last one from the text file. How can I read and output all.

try {
        File f = new File("/Users/Nisham/Desktop/javapwd.txt");
        Scanner sc = new Scanner(f);



        while(sc.hasNextLine()){

            String line = sc.nextLine();
            String[] details = line.split(",");
            String name = details[0];
            //int age = Integer.parseInt(details[2]);
            jTextArea1.setText(name);

        }



    } catch (FileNotFoundException e) {         
        e.printStackTrace();
    }

Answer 1

Each time through the while loop you reset the text to the newly read input, wiping out the previous text. You need to append the text, not set it.

Answer 2

您正在while循环中覆盖jTextArea1中的文本

jTextArea1.setText(name);