How to get the list of files from a directory using java

08/15/2018

The method listFiles of a directory returns the content of that directory. The method takes a filter in parameter that select the files or directory to return. A filter that only returns files is implemented.

Call the following method:

FileFilter fileFilter = new FileFilter() {
    public boolean accept(File file) {
	return file.isFile();
    }
};
	
File[] tab = file.listFiles( fileFilter );

The code of this example lists the directory in the directory v:/tmp. First the code call file.isDirectory() to validate that the Folder we are testing is a directory. It creates a FileFilter returning true only for if the Object is a File. The listFiles method is called with the filter; the file returned in the output are then written in System.out to confirm the filtering.

Create the following java file:

import java.io.File;
import java.io.FileFilter;


public class FolderListFiles {

    public static void main(String[] argv) {

	File file = new File("V:/tmp/");

	if( file.isDirectory() ){
	    System.out.println( file.getName() + " is a directory " );
	}
	
	FileFilter fileFilter = new FileFilter() {
	    public boolean accept(File file) {
		return file.isFile();
	    }
	};
	
	// List all the files using the filter
	File[] tab = file.listFiles( fileFilter );
	
	System.out.println( "The files in the directory are:" );
	for( File current : tab ){
	    System.out.println( current.getAbsolutePath() );
	}
	
    }

}

The output will be:

tmp is a directory
The files in the directory are:
V:\tmp\00012-capture.jpg
V:\tmp\01805-capture.jpg
V:\tmp\01807-capture.jpg

References:

java 7 File