Error occurred during initialization of VM java/lang/NoClassDefFoundError: java/lang/Object
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在doc命令下运行java/javac/java -version时出现
Error occurred during initialization of VM java/lang/NoClassDefFoundError: java/lang/Object
或者由于这个原因eclipse无法打开.
我总结了以下三个原因:
1:java环境变量配置错误,检查环境变量的正误,特别要检查classpath
一般的(仅配置java的情况下),环境变量的值
JAVA_HOME =========“你的jdk安装目录”如“C:\Program Files\Java\jdk1.8.0_121”
Path =========“%JAVA_HOME%\bin;%JAVA_HOME%\jre\bin”
CLASS_PATH =========“%JAVA_HOME%\lib\dt.jar;%JAVA_HOME%\lib\tools.jar”
2:如果环境变量配置木有问题,那就到jdk安装目录下(如C:\Program Files\Java\jdk1.8.0_121)找lib下的tools.jar和jre\lib下的rt.jar,看是否存在,有可能的情况是存在rt.pack 和 tools.pack
这时只要将相应文件解压成rt.jar 和 tools.jar,可以使用bin里面的unpack200工具,
#cd /usr/java/j2sdk1.4.2/lib
#unpack tools.pack tools.jar
#cd ../jre/lib
#../../unpack rt.pack rt.jar
3:存在没有lib下的tools.jar或jre\lib下的rt.jar,或者lib或jre\lib(40个文件)下面的文件有缺失,这时候从别处复制过来就可以了。
如果复制tools.jar或rt.jar之后运行java命令出现乱码,这时可能是jre\lib下面的文件有缺失仔细寻找或者直接复制一整个jre\lib,可以解决。
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