InputStream in = this.getClass().getClassLoader().getResourceAsStream("TextFile.txt");
InputStream in = this.getClass().getResourceAsStream("/TextFile.txt");
package dummy;
import java.io.*;
public class Test
{
    public static void main(String[] args)
    {
        InputStream stream = Test.class.getResourceAsStream("/TextFile.txt");
        System.out.println(stream != null);
        stream = Test.class.getClassLoader().getResourceAsStream("TextFile.txt");
        System.out.println(stream != null);
    }
}