Reading Txt File into a GUI

Question

Hi,
Direction on how to read a text file consisting of rows and columns with 1's and 0's into a GUI would be useful.
I can ask user for filename and display the file in a DOS window but unsure of how I would use a text box to ask for a filename and then display the contents of it into the GUI.
Im fairly new to Java, Where do I start?
Thanks.

Answer 1

Alternatively, take a look at this:
import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
import java.io.*;
class Editor extends JFrame
    private BorderLayout borderLayout1 = new BorderLayout();
    private JScrollPane jScrollPane1 = new JScrollPane();
    private JTextArea jTextArea1 = new JTextArea();
    private JMenuBar jMenuBar1 = new JMenuBar();
    private JMenu jMenu1 = new JMenu();
    private JMenuItem jMenuItem1 = new JMenuItem();
    private JMenuItem jMenuItem2 = new JMenuItem();
    public static void main(String[] args)
        Editor editor=new Editor();
        editor.setBounds(100,100,400,400);
        editor.setVisible(true);
    public Editor()
        try
            jbInit();
        catch(Exception e)
            e.printStackTrace();
        this.pack();
        this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    private void jbInit() throws Exception
        this.getContentPane().setLayout(borderLayout1);
        this.setJMenuBar(jMenuBar1);
        jMenu1.setText("File");
        jMenuItem1.setText("Open");
        jMenuItem1.addActionListener(new java.awt.event.ActionListener()
            public void actionPerformed(ActionEvent e)
                jMenuItem1_actionPerformed(e);
        jMenuItem2.setText("Save");
        jMenuItem2.addActionListener(new java.awt.event.ActionListener()
            public void actionPerformed(ActionEvent e)
                jMenuItem2_actionPerformed(e);
        this.getContentPane().add(jScrollPane1, BorderLayout.CENTER);
        jScrollPane1.getViewport().add(jTextArea1, null);
        jMenuBar1.add(jMenu1);
        jMenu1.add(jMenuItem1);
        jMenu1.add(jMenuItem2);
    void jMenuItem1_actionPerformed(ActionEvent e)
        JFileChooser fileSelectDialog=new JFileChooser();
        fileSelectDialog.setDialogTitle("Open file");
        fileSelectDialog.setFileSelectionMode(JFileChooser.FILES_ONLY);
        fileSelectDialog.setCurrentDirectory(new File("."));
        int result=fileSelectDialog.showDialog(this, null);
        if(result==fileSelectDialog.APPROVE_OPTION)
            File file=fileSelectDialog.getSelectedFile();
            if(file!=null)
                try
                    FileInputStream fileInputStream=new FileInputStream(file);
                    byte[] data=new byte[(int)file.length()];
                    fileInputStream.read(data);
                    jTextArea1.setText(new String(data));
                catch(IOException ex)
                    showExceptionMessage(ex);
    void jMenuItem2_actionPerformed(ActionEvent e)
        JFileChooser fileSelectDialog=new JFileChooser();
        fileSelectDialog.setDialogTitle("Save file");
        fileSelectDialog.setDialogType(JFileChooser.SAVE_DIALOG);
        fileSelectDialog.setFileSelectionMode(JFileChooser.FILES_ONLY);
        fileSelectDialog.setCurrentDirectory(new File("."));
        int result=fileSelectDialog.showDialog(this, null);
        if(result==fileSelectDialog.APPROVE_OPTION)
            File file=fileSelectDialog.getSelectedFile();
            if(file!=null)
                try
                    FileOutputStream fileOutputStream=new FileOutputStream(file,false);
                    fileOutputStream.write(jTextArea1.getText().getBytes());
                catch(IOException ex)
                    showExceptionMessage(ex);
    public void showExceptionMessage(Exception ex)
        StringWriter stringWriter=new StringWriter();
        PrintWriter printWriter=new PrintWriter(stringWriter);
        ex.printStackTrace(printWriter);
        JOptionPane.showMessageDialog(this,stringWriter.toString().replace('\t',' ').replace('\r',' '),"Exception!",JOptionPane.ERROR_MESSAGE);
}