修复JDeveloper 11g 的 Unable to create an instance of the Java Virtual Machine问题
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今天试用了JDeveloper 11，安装后运行出错，提示Unable to create an instance of the Java Virtual Machine!
网上的解决方法：
打开<Oracle JDeveloper>ide/bin/目录下的ide.conf文件，将其中
AddVMOption -Xmx640M
AddVMOption -Xms128M
注释后，添加一行
AddVMOption -XX:MaxPermSize=256M
也就是最终结果为
#AddVMOption -Xmx640M
#AddVMOption -Xms128M
AddVMOption -XX:MaxPermSize=256M
实践中发现，只需要将<Oracle JDeveloper>ide/bin/目录下的ide.conf文件修改为：
AddVMOption -Xmx320M
AddVMOption -Xms128M
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