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I've got an error whilst coding one of my classes. My imports are, import static org.lwjgl.opengl.GL11.GL_COLOR_BUFFER_BIT; import static org.lwjgl.opengl.GL11.GL_MODELVIEW; import static org.lwjgl.opengl.GL11.GL_PROJECTION; import static org.lwjgl.opengl.GL11.glClear; import static org.lwjgl.opengl.GL11.glLoadIdentity; import static org.lwjgl.opengl.GL11.glMatrixMode; import static org.lwjgl.opengl.GL11.glOrtho; import java.util.Random; import org.lwjgl.LWJGLException; import org.lwjgl.input.Keyboard; import org.lwjgl.input.Mouse; import org.lwjgl.opengl.Display; import org.lwjgl.opengl.DisplayMode; public class InputDemo{ public InputDemo(){ int height = 720; int width = 1280; try { Display.setDisplayMode(new DisplayMode(1280, 720)); Display.setTitle("Input Demonstration"); Display.create(); } catch (LWJGLException e) { e.printStackTrace(); } //Initialization code OpenGL glMatrixMode(GL_PROJECTION); glLoadIdentity(); glOrtho(0.0, 1280.0, 720.0, 0.0, 1.0, -1.0); glMatrixMode(GL_MODELVIEW); while(!Display.isCloseRequested()) { //Render (Quads are X, Y (Across, Up + Down)) glClear(GL_COLOR_BUFFER_BIT); if(Keyboard.isKeyDown(Keyboard.KEY_ESCAPE)) { Display.destroy(); System.exit(0); } int dx = Mouse.getDX(); int dy = -Mouse.getDY(); System.out.println(dx + ", " + dy); Display.update(); Display.sync(60); } Display.destroy(); } private static class Box{ public int x, y; public boolean selected = false; private float colorRed, colorBlue, colorGreen; Box(int x, int y) { this.x = x; this.y = y; Random randomGenerator = new Random(); colorRed = randomGenerator.nextFloat(); colorBlue = randomGenerator.nextFloat(); colorGreen = randomGenerator.nextFloat(); } boolean inBounds(in

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