昨天心血来潮,突然想写了个java类 写了个main方法,然后直接运行;然后问题出现了,如下图：
google了一把都说是java compiler版本不一致,然后也检查了本项目的java compiler的等级和我的工作空间的java compiler等级一样都是1.6,用的jdk1.6.0_45,也有说java环境变量配置错误,然后我又重新检查了一遍JAVA_HOME、CLASSPATH、PATH,发现环境变量也没有配置错误,实在郁闷,检查了半天,最后终于找到了解决办法,原来是我之前将这个项目的Builders中的Java Builder选项去除了,需要勾选上,然后clean下项目,重新运行 问题解决。
后来查了下Java Builder选项的作用,只找到了一个对其解释的链接如下：
http://help.eclipse.org/juno/index.jsp?topic=%2Forg.eclipse.jdt.doc.user%2Fconcepts%2Fconcept-java-builder.htm
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