MyEclipse下Debug模式失效的解决方法.
很郁闷的被这个问题搞了大半天，debug模式突然不能用了,出现如下错误:
弹出错误“Unable to install breakpoint due to missing line number attributes,Modify compiler options to generate line number attributes"
谷歌得解:
【项目右键】-【properties】-【Java Compiler】-【Add line number attributes to generated class files(userd by the debugger)】选中打勾即可。如图：
