IDEA 运行测试报错 Error: Could not create the Java Virtual Machine. Error: A fatal exception has occurred.

Error: Could not create the Java Virtual Machine.
Error: A fatal exception has occurred. Program will exit.
Error occurred during initialization of VM
Could not reserve enough space for object heap

1、判断机子是否安装了JDK，是否配置环境变量

环境变量：如JAVA_HOME,CLASSPATH,PATH

 2、看下C:\Windows\System32生成的java.exe、javaw.exe、javaws.exe这个3个引起的；只要把这3个运行文件删除掉试试。

3、在环境变量中显示定义参数来设置虚拟机大小。