Syntax error, parameterized types are only available if source level is 5.0
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List<User> users = new ArrayList<User>();
在左边出现一个小红叉,报错:
"Syntax error,parameterized types are only available if source level is 5.0"
说明编译环境不是在5.0,但是MyEclipse中应用的jdk明明是1.5或以上版本。
有两种方法处理:
一种是Myeclipse对所有项目默认的设置是5.0以下,项目继承了默认设置(在Myeclipse IDE中的菜单Window/Preferences/Java/Compiler里改为5.0或高于5.0)
另一种是单个项目里设置了source level 5.0以下(在项目属性/Java Compiler 里改为5.0或高于5.0)
在myeclipse里引入新项目的时候会报如下错误:
在使用泛型的地方提示:
Multiple markers at this line
- Syntax error, parameterized types are only available if source level
is 5.0
- The type List is not generic; it cannot be parameterized with
arguments <Application>
1)一种是Eclipse对所有项目默认的设置是5.0以下,项目继承了默认设置(在Preferences/Java/Compiler里改为5.0或高于5.0)
另一种是项目里设置了source level 5.0以下(在 项目属性/Java Compiler 里改为5.0或高于5.0)
你的JDK 版本比较旧,或者你装了比较新的版本,但是你在Eclipse中的设置有问题,编译级别设置的不是比较新的版本的编译器。
eclipse措无题诗如下:
Multiple markers at this line
- Syntax error, parameterized types are only available if source level
is 5.0
译:语法错误 ,泛型只有在5.0以上的版本才支持
- The type List is not generic; it cannot be parameterized with
arguments <Application>
List 不是泛型,引起的原因还是编译器不支持~~
这时候需要改动两个地方:
1.右击项目-->properties-->java compiler -->选择enabel project specific setting -->Compiler compliance level :选择1.5版本,其他默认
2.右击项目-->properties -->project facets-->将java后的下拉框选择为5.0
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