JFileChooser Component in Java

Submitted by donbermoy on Monday, November 17, 2014 - 11:49.

This is a tutorial in which we will going to create a program that has the JFileChooser Component using Java. The JFileChooser is used to let the user to choose or open a specific file. So, now let's start this tutorial! 1. Open JCreator or NetBeans and make a java program with a file name of jFileChooserComponent.java. 2. Import the following packages:

import java.io.*; //used for accessing the file class
import javax.swing.*// used to access the JFrame and JFileChooser class

3. Initialize your variable in your Main, variable fileChooser for the JFileChooser class.

JFileChooser fileChooser = new JFileChooser();

4. Instantiate JFileChooser class variable with its FileFilter method to filter files. We will use the accept method to accept any files that has a .gif, .png, and .jpg file extension. Then we will use the getDescription method to have the description of these file extension of images.

    fileChooser.setFileFilter(new javax.swing.filechooser.FileFilter() {
        
      public boolean accept(File f) {
        return f.getName().toLowerCase().endsWith(".gif")|| f.getName().toLowerCase().endsWith(".png") || f.getName().toLowerCase().endsWith(".jpg") || f.isDirectory();
      }
 
      public String getDescription() {
        return "Image Files";
      }
    });

Now, create again the FileFilter method to filter the text files with a .txt, .docx, and .rtf file extension.

    fileChooser.setFileFilter(new javax.swing.filechooser.FileFilter() {
      public boolean accept(File f) {
        return f.getName().toLowerCase().endsWith(".txt")|| f.getName().toLowerCase().endsWith(".docx") || f.getName().toLowerCase().endsWith(".rtf") || f.isDirectory();
      }
 
      public String getDescription() {
        return "Text Files";
      }
    });

5. To open the JFileChooser component in the JFrame, initialize a variable named var with a showOpenDialog instantiating a JFrame.

int var = fileChooser.showOpenDialog(new JFrame());

If our variable var will be equal to the JFileChooser's APPROVE_OPTION, then we will get the file name of the selected file using the getSelectedFile().getName() method and will display the filename.

    int var = fileChooser.showOpenDialog(new JFrame());
    if (var == JFileChooser.APPROVE_OPTION) {
      String name = fileChooser.getSelectedFile().getName();
      System.out.println("File name: " + name);
    }

Output: output

Here's the full code of this tutorial:

import java.io.*; //used for accessing the file class
import javax.swing.*;// used to access the JFrame and JFileChooser class
 
 
public class jFileChooserComponent {
 
  public static void main(String[] args) {
    JFileChooser fileChooser = new JFileChooser();
 
    fileChooser.setFileFilter(new javax.swing.filechooser.FileFilter() {
        
      public boolean accept(File f) {
        return f.getName().toLowerCase().endsWith(".gif")|| f.getName().toLowerCase().endsWith(".png") || f.getName().toLowerCase().endsWith(".jpg") || f.isDirectory();
      }
 
      public String getDescription() {
        return "Image Files";
      }
    });
    
    fileChooser.setFileFilter(new javax.swing.filechooser.FileFilter() {
      public boolean accept(File f) {
        return f.getName().toLowerCase().endsWith(".txt")|| f.getName().toLowerCase().endsWith(".docx") || f.getName().toLowerCase().endsWith(".rtf") || f.isDirectory();
      }
 
      public String getDescription() {
        return "Text Files";
      }
    });
 
    int var = fileChooser.showOpenDialog(new JFrame());
    if (var == JFileChooser.APPROVE_OPTION) {
      String name = fileChooser.getSelectedFile().getName();
      System.out.println("File name: " + name);
    }
  }
}

For more inquiries and need programmer for your thesis systems in any kind of programming languages, just contact my number below. Best Regards, Engr. Lyndon Bermoy IT Instructor/System Developer/Android Developer/Freelance Programmer Mobile: 09488225971 Landline: 826-9296 E-mail:[email protected] Add and Follow me on Facebook: https://www.facebook.com/donzzsky Visit and like my page on Facebook at: https://www.facebook.com/BermzISware

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