如何在libgdx中使用rectangle类绘制矩形边框？

import com.badlogic.gdx.ApplicationAdapter;
import com.badlogic.gdx.Gdx;
import com.badlogic.gdx.graphics.GL20;
import com.badlogic.gdx.graphics.glutils.ShapeRenderer;
import com.badlogic.gdx.math.Rectangle;

public class RectangleBorderExample extends ApplicationAdapter {
    ShapeRenderer shapeRenderer;
    Rectangle rect;

    @Override
    public void create() {
        shapeRenderer = new ShapeRenderer();
        rect = new Rectangle(100, 100, 200, 150); // 创建一个矩形区域
    }

    @Override
    public void render() {
        Gdx.gl.glClearColor(1, 1, 1, 1); // 设置背景颜色为白色
        Gdx.gl.glClear(GL20.GL_COLOR_BUFFER_BIT); // 清除屏幕

        shapeRenderer.begin(ShapeRenderer.ShapeType.Filled); // 开始渲染
        shapeRenderer.setColor(0, 0, 0, 1); // 设置绘制颜色为黑色
        shapeRenderer.rectLine(rect.x, rect.y, rect.x + rect.width, rect.y, 5); // 上边框
        shapeRenderer.rectLine(rect.x + rect.width, rect.y, rect.x + rect.width, rect.y + rect.height, 5); // 右边框
        shapeRenderer.rectLine(rect.x + rect.width, rect.y + rect.height, rect.x, rect.y + rect.height, 5); // 下边框
        shapeRenderer.rectLine(rect.x, rect.y + rect.height, rect.x, rect.y, 5); // 左边框
        shapeRenderer.end(); // 结束渲染
    }

    @Override
    public void dispose() {
        shapeRenderer.dispose(); // 释放资源
    }
}