File->project structure, 打开project structure面板 ,有个project language level,改成6.0.
注:可以设置单独模块,打开Modules,选中对应模块,sources面板有个language level,改成6.0.
File->project structure, 打开project structure面板 ,有个project language level,改成6.0.
注:可以设置单独模块,打开Modules,选中对应模块,sources面板有个language level,改成6.0.