Texture error

TextureError

import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.IOException;

import org.lwjgl.LWJGLException;
import org.lwjgl.opengl.Display;
import org.lwjgl.opengl.DisplayMode;
import org.newdawn.slick.AngelCodeFont;
import org.newdawn.slick.SlickException;
import org.newdawn.slick.opengl.Texture;
import org.newdawn.slick.opengl.TextureLoader;

import static org.lwjgl.opengl.GL11.*;

public class TextureError {
	public Texture tex;
	
	public TextureError(){
        try {
            Display.setDisplayMode(new DisplayMode(800, 600));
            Display.create();
            
	        glMatrixMode(GL_PROJECTION);
	        glLoadIdentity();
	        glOrtho(0, 800, 600, 0, 1, -1);
	        glMatrixMode(GL_MODELVIEW);
	        glEnable(GL_TEXTURE_2D);
	        
        } catch (LWJGLException e) {
            e.printStackTrace();
        }
        
        tex = loadTexture();
	}
	
	public void start(){
		while(!Display.isCloseRequested()){
			glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
			glMatrixMode(GL_MODELVIEW);
			glLoadIdentity();
			Display.sync(60);
			
			renderTexture();
			renderColoredRectangle();
			
			Display.update();
		}
		
		Display.destroy();
	}
	
	private void renderTexture(){
        tex.bind();
        glBegin(GL_TRIANGLES);
        
        glTexCoord2f(1, 0);
        glVertex2i(150, 10);
        glTexCoord2f(0, 0);
        glVertex2i(10, 10);
        glTexCoord2f(0, 1);
        glVertex2i(10, 150);
        
        glTexCoord2f(0, 1);
        glVertex2i(10, 150);
        glTexCoord2f(1, 1);
        glVertex2i(150, 150);
        glTexCoord2f(1, 0);
        glVertex2i(150, 10);
        
        glEnd();
	}
	
	private void renderColoredRectangle(){
		glColor3f(255f, 0f, 255f);
		glRecti(200, 200, 300, 300);
	}

    private Texture loadTexture() {
        try {
            return TextureLoader.getTexture("JPG", new FileInputStream(new File("img.jpg")));
        } catch (FileNotFoundException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        }
        return null;
    }
	
	public static void main(String[] args){
		new TextureError().start();
	}
}