How to use Java JFileChooser

How to use Java JFileChooser,

Java JFileChooser class is used to create a window that allows a user to select a file.JFileChooser inherits methods from JComponent class.

Declaring  Java JFileChooser 

[class JFileChooser extends JComponent implements Accessible
  

]

Java JFileChooser Constructors

• JFileChooser()-creates a JFileChooser pointing to default directory.
• JFileChooser(File directory)-create JFileChooser with a given File as  path
• JFileChooser(String directory)-creates JFileChooser using a certain path.

Java JFileChooser Example

[

/** * * @author Eric 

* Blog:techoverload.net */

import javax.swing.UIManager;
import javax.swing.JFrame;

import javax.swing.JMenu;
import javax.swing.JMenuBar;
import javax.swing.JFileChooser;
import javax.swing.JMenuItem;
import javax.swing.JTextArea;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.io.BufferedReader;
import java.io.FileReader;
import java.io.File;


public class JavaJFileChooserExample extends JFrame  implements ActionListener{
    public JMenu file;
    public JMenuBar bar;
    public JMenuItem open,copy,cut,paste,select;
    public JTextArea area;

    public JFileChooser chooser;
    JavaJFileChooserExample()
    {
        super("Java JFileChooser Example");
        try        {
            UIManager.setLookAndFeel

("com.sun.java.swing.plaf.windows.WindowsClassicLookAndFeel");
        }
        catch(Exception e)
        {
            e.printStackTrace();
        }
        bar=new JMenuBar();
        file=new JMenu("File");
        open=new JMenuItem("Open");
        file.add(open);
        bar.add(file);
        select=new JMenuItem("Select All");
        select.addActionListener(this);
        file.add(select);
        copy=new JMenuItem("Copy");
        file.add(copy);
        cut=new JMenuItem("Cut");
        file.add(cut);
        paste=new JMenuItem("Paste");
        file.add(paste);
        open.addActionListener(this);
        copy.addActionListener(this);
        paste.addActionListener(this);
        cut.addActionListener(this);

        bar.setBounds(0,0,400,20);
        add(bar);
        area=new JTextArea(400,400);
        area.setBounds(0,20,400,400);
        add(area);


        setSize(400,400);
        setLayout(null);
        setLocationRelativeTo(null);
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        setVisible(true);


    }
    public void actionPerformed(ActionEvent event)
    {
        if(event.getSource()==open)
        {
            chooser=new JFileChooser();
            int j=chooser.showOpenDialog(null);

            if(j==JFileChooser.APPROVE_OPTION)
            {
                File f=chooser.getSelectedFile();
                String path=f.getPath();
                try{
                    BufferedReader br=new BufferedReader(new FileReader(path));
                    String s1="",s2="";
                    while((s1=br.readLine())!=null){
                        s2+=s1+"\n";
                    }
                    area.setText(s2);
                    br.close();
                }

                catch(Exception e)
                {
                    e.printStackTrace();

                }}}

        else if(event.getSource()==copy)
        {
            area.copy();
        }
        else if(event.getSource()==cut)
        {
            area.cut();
        }
        else if(event.getSource()==paste)
        {
            area.paste();
        }
        else if(event.getSource()==select)
        {
            area.selectAll();
        }
    }


    public static void main(String args[])
    {
        new JavaJFileChooserExample();
    }

}

]

Outputs:

Above image is when the UIManger is set to WindowsClassicLookAndFeel .If we use default Java Look this how JFileChooser will look like.

Related Tutorials

• How to create Spinner using Java JSpinner class.

• Simple Java JDialog Example.

• JPanel Basic Tutorial.