The type java.lang.Object cannot be resolved....

来源：百度文库编辑：神马文学网时间：2024/04/27 03:15:35

eclipse菜单栏点击project----->propertys 在里面再选择Java Build Path -----> Libraries---->Add Libraries----->JRE System Library

电脑上安装了多个版本的jdk

Eclipse使用哪个JDK和你的项目使用哪个JDK是完全不同的概念..
右键你的项目->属性->Java构建路径->库;在这里你就可以看到你的项目所使用的JDK了.把导入时的那个JDK删除.单击右边的"添加库"按钮.选择"JRE系统库".

eclipse为什么出现the type java.lang.Object cannot be resolved
The project was not built since its build path is incomplete. Cannot find the class file for java.lang.Object. Fix the build path then try building this project
The type java.lang.Object cannot be resolved. It is indirectly referenced from required .class files
出現以上訊息的原因是因為你裝了多個版本的jre或jdk的關係。本來Eclipse在建立專案時，會自動參照你的jre路徑，但多個版本就沒辦法了。
...
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a. 进入window\preferences\java\Installed JREs
1)按Add
2)输入JRE Name, 例JDK1.5.0.03
3)JRE home directory, 选择安装的路径
4)按OK
b. 进入Project\properties\Java Bulid Path
1)Add library
2)选JRE System Library后按Next
3)选workplace default JRE后按finish...
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