Solving strange null pointers.

InputHandler.java

public class InputHandler {

	public final KBOApi api;
	
	private Map<Integer, Boolean> keyStatesMap = new HashMap<Integer, Boolean>();

	public InputHandler(KBOApi api) {
		this.api = api;
	}

	public void tick(){
		for(int i = 0; i < Mouse.getButtonCount(); i++){
			setMouseKeyPressed(i, Mouse.isButtonDown(i));
		}
		for(int i = 0; i < Keyboard.getKeyCount(); i++){
			setKeyboardKeyPressed(i, Keyboard.isKeyDown(i));
		}
	}
	
	public boolean isPressed(int key){
		return keyStatesMap.get(key);
	}
	
	public void setPressed(int key, boolean pressed){
		keyStatesMap.put(key, pressed);
	}
	
	public boolean isKeyboardKeyPressed(int key){
		return isPressed(key);
	}
	
	public void setKeyboardKeyPressed(int key, boolean pressed){
		setPressed(key, pressed);
	}
	
	public boolean isKeyboardKeyPressed(String key){
		return isKeyboardKeyPressed(Keyboard.getKeyIndex(key));
	}
	
	public void setKeyboardKeyPressed(String key, boolean pressed){
		setKeyboardKeyPressed(Keyboard.getKeyIndex(key), pressed);
	}
	
	public boolean isMouseKeyPressed(int key){
		return isPressed(-100 + key);
	}
	
	public void setMouseKeyPressed(int key, boolean pressed){
		setPressed(-100 + key, pressed);
	}
	
	public boolean isMouseKeyPressed(String key){
		return isMouseKeyPressed(Mouse.getButtonIndex(key));
	}
	
	public void setMouseKeyPressed(String key, boolean pressed){
		setMouseKeyPressed(Mouse.getButtonIndex(key), pressed);
	}

}