[案例1：rect()与stroke()绘制矩形](2%E3%80%81%E7%BB%98%E5%88%B6%E7%9F%A9%E5%BD%A2/%E6%A1%88%E4%BE%8B1%EF%BC%9Arect%E4%B8%8Estroke%E7%BB%98%E5%88%B6%E7%9F%A9%E5%BD%A2.md) [案例2：fillRect()绘制矩形](2%E3%80%81%E7%BB%98%E5%88%B6%E7%9F%A9%E5%BD%A2/%E6%A1%88%E4%BE%8B2%EF%BC%9AfillRect%E7%BB%98%E5%88%B6%E7%9F%A9%E5%BD%A2.md)