Java swing的疑问：无法显示背景颜色(两幅代码)

Java swing的问题:无法显示背景色(两个代码)Java swing的问题:无法显示背景色(两个代码)简介: = = = = = = = = = = = = = = =分割线= = = = = = = = = = = = = = = = = =分辨率:< p gtpublic snake panel(){ lt；br gt ampnbsp ampnbsp amp不间断空格