搞了个Maven工程在Eclipse上,刚开始说JDK版本不对,编译的时候老报错误,很容易搞明白, 本地JDK版本为1.7.0_79: diamond operator is not supported in -source 1.5 [ERROR] (use -source 7 or higher to enable diamond operator) 加上以下语句即可: <build> <plugins> <plugin&
打开VMWare虚拟机提示有: This virtual machine appears to be in use. If this virtual machine is already in use, press the "Cancel" button to avoid damaging it. If this virtual machine is not in use, press the "Take Ownership" button to obtain ow
使用Eclipse 进行项目开发,在实现类中的方法前面如果添加@Override就提示“Multiple markers at this line”的错误,问题描述如下 应该是JDK版本的问题, 右击项目--Properties--Java compiler 可参考:http://blog.csdn.net/mazhaojuan/article/details/28931375
Implicit super constructor Object() is undefined for default constructor. Must define an explicit constructor解决方案:把Java的类库加载进去,在工程上右键选择属性->JavaBuild Path的Libraries->Add Library选择JRE System Library->点击Next->选择Execution environment并选择版本或workspac