he method isEmpty() is undefined for the type String/String
来源：互联网 发布：程序员有黑客的技术? 编辑：程序博客网 时间：2024/06/04 19:28
原因是：JDK版本问题，JDK1.5中的String 类型变量没有isEmpty方法，而JDK1.6中有这个方法，所以只要把你的JDK版本改成1.6的应该没问题。
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