ADDITIONAL SYSTEM INFORMATION :
windows7
openjdk jdk-12.0.1


A DESCRIPTION OF THE PROBLEM :
when I use `java -version` in cmd ,return NullPointerException:

Error occurred during initialization of VM
java.lang.NullPointerException
        at java.lang.System.getProperty(java.base/System.java:848)
        at sun.security.action.GetPropertyAction.privilegedGetProperty(java.base
/GetPropertyAction.java:105)
        at java.nio.charset.Charset.defaultCharset(java.base/Charset.java:607)
        at java.lang.StringCoding.decode(java.base/StringCoding.java:316)
        at java.lang.String.<init>(java.base/String.java:601)
        at java.lang.String.<init>(java.base/String.java:623)
        at jdk.internal.util.SystemProps$Raw.vmProperties(java.base/Native Metho
d)
        at jdk.internal.util.SystemProps$Raw.cmdProperties(java.base/SystemProps
.java:261)
        at jdk.internal.util.SystemProps.initProperties(java.base/SystemProps.ja
va:55)
        at java.lang.System.initPhase1(java.base/System.java:1997)