JFileChooser/FileFilter{Resolved}

[Dillinger4]

Anyone know what i might be doing wrong. I can see that when jfc.showOpenDialog(jf); is called all of the files within the current directory are being scanned cause i can see them flying through the dos window, but when i change the extension in the FileDialog the files that come up within the JFileChooser aren't being filtered.

 openfile.addActionListener(new ActionListener(){
   public void actionPerformed(ActionEvent evt){
    class JavaFilter extends javax.swing.filechooser.FileFilter{
      public boolean accept(File file){
       String filename = file.getName(); 
       String extension = filename.substring(0, filename.length());
       System.out.println(extension);
       if(extension.equals(".java")){
        return true;
       }
	return false; 
       }
       public String getDescription() {
        return ".java Files";
       }
      }
       JFileChooser jfc = new JFileChooser();
       jfc.setFileFilter(new JavaFilter());
       jfc.showOpenDialog(jf);
   }
  });

[System_Error]

I don't know if this will help, but this is the Filter class I used for my Text Editor, and it works...

import java.io.File;

public class TextFileFilter extends javax.swing.filechooser.FileFilter
{
	public boolean accept(File f)
	{
		// if its a directory show it
		if (f.isDirectory())
			return true;
		
		//Get the file extention
		String extention = getExtention(f);
		//Check to see if the extention is equal to "txt" or "text"
		if ((extention.equals("txt")) || (extention.equals("text")))
			return true;
		
		return false;
	}
	
	public String getDescription()
	{
		return "Text files";
	}
	
	/**
	  Method to get the extention of the file, in lowercase
	 */
	 
	 private String getExtention(File f)
	 {
		 String s = f.getName();
		 int i = s.lastIndexOf('.');
		 if (i > 0 && i < s.length() - 1)
			 return s.substring(i+1).toLowerCase();
		 return "";
	 }
}

[Dillinger4]

I added the test i > 0 because it seems substring() kept throwing an indexoutofbounds exception for files with no extension.

 class JavaFilter extends javax.swing.filechooser.FileFilter{
  String extension;
  public boolean accept(File file){
   if(file.isDirectory()) return false; 
   String filename = file.getName(); 
   int i = filename.indexOf('.'); 
    if (i > 0){
    extension = filename.substring(i);
    }
    if(extension.equals(".java")){
     return true;
    }
     return false; 
  }
  public String getDescription() {
   return ".java files";
  }
 }

[System_Error]

And that worked?

[Dillinger4]

Yeah it works pretty good now. The exception was only being thrown when i browsed on over to my C:\ drive. For some reason i have .java files on C:\ that have no extension.