java - 如何将文本文件中的行复制到 JComboBox 中？

Question

我试图将文本文件的每一行复制到 jcomboBox 中，但它只在 jcomboBox 中显示文本文件的第一行...我不明白为什么。你能解释一下出了什么问题吗？

(...)
BufferedReader in;
    String read;

        try {
            in = new BufferedReader(new FileReader("D:/File.txt"));


            read = in.readLine();

            lines[w]=read;

             ++w;

            in.close();
        }catch(IOException e){
            System.out.println("There was a problem:" + e);
        }

    combo1 = new JComboBox(lines);

    combo1.setPreferredSize(new Dimension(100,20));
    combo1.setForeground(Color.blue);


    JPanel top = new JPanel();
    top.add(label);
    top.add(combo1);

    combo1.addActionListener(new ActionFichiers());

    container.add(top, BorderLayout.NORTH);
    this.setContentPane(container);
    this.setVisible(true);            
    }
(...)

Answer 1

那是因为您只读取了第一行并关闭了文件，请考虑:

     try {
        in = new BufferedReader(new FileReader("D:/File.txt"));
        while((read = in.readLine()) != null){
            lines[w]=read;
           ++w;
        }
        in.close();
    }catch(IOException e){
        System.out.println("There was a problem:" + e);
    }

注意:我假设数组 lines 足够大