keyboard input

package com.mygdx.game;

import com.badlogic.gdx.Game;
import com.badlogic.gdx.Gdx;
import com.badlogic.gdx.Input;
import com.badlogic.gdx.graphics.Texture;
import com.badlogic.gdx.graphics.g2d.SpriteBatch;
import com.badlogic.gdx.utils.ScreenUtils;

public class MyGdxGame extends Game {
    SpriteBatch batch;
    Texture img;
    float x = 0, y = 0;
    public static final float SPEED = 150;

    @Override
    public void create () {
        batch = new SpriteBatch();
        img = new Texture("badlogic.jpg");
    }

    @Override
    public void render () {
        ScreenUtils.clear(0, 1, 0, 1);
        if (Gdx.input.isKeyPressed(Input.Keys.UP)) {
            y += SPEED * Gdx.graphics.getDeltaTime();
        }
        if (Gdx.input.isKeyPressed(Input.Keys.DOWN)) {
            y -= SPEED * Gdx.graphics.getDeltaTime();
        }
        if (Gdx.input.isKeyPressed(Input.Keys.LEFT)) {
            x -= SPEED * Gdx.graphics.getDeltaTime();
        }
        if (Gdx.input.isKeyPressed(Input.Keys.RIGHT)) {
            x += SPEED * Gdx.graphics.getDeltaTime();
        }
        batch.begin();
        batch.draw(img, x, y);
        batch.end();
    }

    @Override
    public void dispose () {
        batch.dispose();
        img.dispose();
    }
}