Java file input not working after compile

Java file input not working after compile

so I trying to import a file that's in my res folder, so far I have been
using this method.
File f = new File("src/resources/levels/" + part + "/" + filename + ".txt");
But after I compile it and run it as a jar it no longer works, I
understand this is because its looking for the file on the disk instead of
the jar, I had the same problem with importing my images and font but I
managed to fix that but after researching and I just can't find a
different way. I'm not getting any errors when I run the jar, instead the
information just doesn't show up, and this is compiling and running fine
in eclipse.
This is my resource file:
package scrolls;
import java.awt.Font;
import java.awt.image.BufferedImage;
import java.io.BufferedReader;
import java.io.File;
import java.io.FileReader;
import java.io.IOException;
import javax.annotation.Resource;
import javax.imageio.ImageIO;
import org.imgscalr.Scalr;
public class Resources
{
static BufferedImage[] textures = new BufferedImage[8];
static BufferedImage[] mapTextures = new BufferedImage[9];
static BufferedImage texture;
static BufferedImage[] waterAnimated = new BufferedImage[64];
static BufferedImage water;
static BufferedImage icon;
public static Font f, fs;
static int imageCounter = 0;
public Resources()
{
textures();
createArray(texture, textures, 32, 1, 8);
createArray(water, waterAnimated, 32, 64, 1);
getFont();
buildMapTextures(textures, mapTextures);
}
public static void counter()
{
imageCounter++;
if (imageCounter >= 500)
imageCounter = 0;
//System.out.println(imageCounter / 8);
}
private void buildMapTextures(BufferedImage[] textures,
BufferedImage[] mapTextures)
{
for (int i = 0; i <= 7; i++)
{
mapTextures[i] = resize(textures[i], 3, 3);
}
mapTextures[8] = resize(waterAnimated[2], 3, 3);
}
private BufferedImage resize(BufferedImage image, int newW, int newH)
{
BufferedImage thumbnail = Scalr.resize(image,
Scalr.Method.ULTRA_QUALITY, Scalr.Mode.FIT_EXACT, newW, newH,
Scalr.OP_ANTIALIAS);
return thumbnail;
}
public static BufferedImage waterAnimation()
{
return waterAnimated[imageCounter / 8];
}
private void textures()
{
try
{
texture =
ImageIO.read(Resource.class.getResource("/resources/textures.png"));
} catch (IOException e)
{
}
try
{
water =
ImageIO.read(Resource.class.getResource("/resources/water.png"));
} catch (IOException e)
{
}
try
{
icon =
ImageIO.read(Resource.class.getResource("/resources/icon.png"));
} catch (IOException e)
{
}
}
static BufferedImage player()
{
BufferedImage player = null;
try
{
player =
ImageIO.read(Resource.class.getResource("/resources/player.png"));
} catch (IOException e)
{
}
return player;
}
static void createArray(BufferedImage image, BufferedImage[] images,
int size, int rows, int cols)
{
BufferedImage temp = image;
for (int i = 0; i < rows; i++)
{
for (int j = 0; j < cols; j++)
{
images[(i * cols) + j] = temp.getSubimage(j * size, i *
size, size, size);
}
}
}
void readLevel(String filename, int[][] level, int part)
{
try
{
File f = new File("src/resources/levels/" + part + "/" +
filename + ".txt");
FileReader fr = new FileReader(f);
BufferedReader in = new BufferedReader(fr);
StringBuilder sb = new StringBuilder();
byte b = 0;
while ((b = (byte) in.read()) != -1)
{
sb.append("" + ((char) b));
}
String str = sb.toString();
String[] lines = str.split("(\n|\r)+");
for (int i = 0; i < lines.length; i++)
{
for (int j = 0; j < lines[i].length(); j++)
{
level[i][j] = Integer.parseInt("" + lines[i].charAt(j));
}
}
in.close();
} catch (Exception e)
{
e.printStackTrace();
}
}
private void getFont()
{
try
{
f = Font.createFont(Font.TRUETYPE_FONT,
getClass().getResourceAsStream("/resources/Jet Set.ttf"));
fs = Font.createFont(Font.TRUETYPE_FONT,
getClass().getResourceAsStream("/resources/Jet Set.ttf"));
} catch (Exception e)
{
System.out.println(e);
}
f = f.deriveFont(22f);
fs = fs.deriveFont(13f);
}
}
So how would I import my file so it can be read when compiled into a jar?