Null Pointer exception while Fetching the file path from jfilechooser

Question

On clicking the open button, I am trying to fetch the path of the file, including the file name I opened.

Code:

private void jFileChooser1ActionPerformed(java.awt.event.ActionEvent evt) {   
    JFileChooser chooser=new JFileChooser();
    String path=chooser.getSelectedFile().getAbsolutePath();//error
    System.out.println(path);
}

But I am getting a null pointer exception in the commented (//errror) line.

Where am I going wrong?

Before the chooser is displayed to the user, it won't ***have*** a selected file (unless set by the programmer)! — Andrew Thompson, Mar 15 '17 at 08:38
read the javadocs `int returnVal = chooser.showOpenDialog(parent); if(returnVal == JFileChooser.APPROVE_OPTION) { System.out.println("You chose to open this file: " + chooser.getSelectedFile().getName()); }` — Scary Wombat, Mar 15 '17 at 08:39
Instead of creating a new `JFileChooser` instance, you need to get the selected file from the event. — Filburt, Mar 15 '17 at 08:40
@AndrewThompson so what is the order of doing this? Kindly suggest me on this, I am jsut migrating from python to JAVA — vikky 2405, Mar 15 '17 at 08:40
Can't speak for Python, but for Java there's this marvellous resource that can be found with a search string of 'hot to X' where in this case X is 'jfilechooser'. Top hit is [How to Use File Choosers](https://docs.oracle.com/javase/tutorial/uiswing/components/filechooser.html). Book mark the tutorial. — Andrew Thompson, Mar 15 '17 at 08:50
BTW - that should have been '**how** to X'.. :P But I'm hoping you figured that out. ;) — Andrew Thompson, Mar 15 '17 at 08:59

score 0 · Accepted Answer · answered Mar 15 '17 at 08:40

0

You should open it at first!

Use this sample code:

JFileChooser fileChooser = new JFileChooser();
fileChooser.setCurrentDirectory(new File(System.getProperty("user.home")));
int result = fileChooser.showOpenDialog(this);
if (result == JFileChooser.APPROVE_OPTION) {
File selectedFile = fileChooser.getSelectedFile();
System.out.println("Selected file: " + selectedFile.getAbsolutePath());
}

answered Mar 15 '17 at 08:40

Rasool Kiani

50
7

thanks it is working. But how do I restrict this action only to "open" button in the file chooser. – vikky 2405 Mar 15 '17 at 08:50
@vikky2405 : this is already done by the `if (result == JFileChooser.APPROVE_OPTION)` condition . – Arnaud Mar 15 '17 at 08:57

Null Pointer exception while Fetching the file path from jfilechooser

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