HelloWorld.java

import com.badlogic.gdx.ApplicationAdapter;
import com.badlogic.gdx.Gdx;
import com.badlogic.gdx.graphics.GL20;
import com.badlogic.gdx.graphics.g2d.BitmapFont;
import com.badlogic.gdx.graphics.g2d.SpriteBatch;

public class HelloWorld extends ApplicationAdapter {
    SpriteBatch batch;
    BitmapFont font;

    @Override
    public void create() {
        batch = new SpriteBatch();
        font = new BitmapFont();
        font.getData().setScale(2.0f);
    }

    @Override
    public void render() {
        Gdx.gl.glClearColor(0.2f, 0.3f, 0.3f, 1);
        Gdx.gl.glClear(GL20.GL_COLOR_BUFFER_BIT);
        
        batch.begin();
        font.draw(batch, "Hello, World!", 
                  Gdx.graphics.getWidth() / 2f - 100, 
                  Gdx.graphics.getHeight() / 2f);
        batch.end();
    }

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