java - Andrioid studio start fail: Fatal error initializing 'null' -

i don't know happened android studio，when start ，it shows me error message below. , try uninstall/reinstall it,but doesn't work.who can me!!!

internal error. please report https://code.google.com/p/android/issues java.lang.runtimeexception: com.intellij.ide.plugins.pluginmanager$startupabortedexception: fatal error initializing 'null'     @ com.intellij.idea.ideaapplication.run(ideaapplication.java:178)     @ com.intellij.idea.mainimpl$1$1$1.run(mainimpl.java:52)     @ java.awt.event.invocationevent.dispatch(invocationevent.java:209)     @ java.awt.eventqueue.dispatcheventimpl(eventqueue.java:715)     @ java.awt.eventqueue.access$400(eventqueue.java:82)     @ java.awt.eventqueue$2.run(eventqueue.java:676)     @ java.awt.eventqueue$2.run(eventqueue.java:674)     @ java.security.accesscontroller.doprivileged(native method)     @ java.security.accesscontrolcontext$1.dointersectionprivilege(accesscontrolcontext.java:86)     @ java.awt.eventqueue.dispatchevent(eventqueue.java:685)     @ com.intellij.ide.ideeventqueue.dispatchevent(ideeventqueue.java:362)     @ java.awt.eventdispatchthread.pumponeeventforfilters(eventdispatchthread.java:296)     @ java.awt.eventdispatchthread.pumpeventsforfilter(eventdispatchthread.java:211)     @ java.awt.eventdispatchthread.pumpeventsforhierarchy(eventdispatchthread.java:201)     @ java.awt.eventdispatchthread.pumpevents(eventdispatchthread.java:196)     @ java.awt.eventdispatchthread.pumpevents(eventdispatchthread.java:188)     @ java.awt.eventdispatchthread.run(eventdispatchthread.java:122) caused by: com.intellij.ide.plugins.pluginmanager$startupabortedexception: fatal error initializing 'null'     @ com.intellij.ide.plugins.pluginmanager.handlecomponenterror(pluginmanager.java:248)     @ com.intellij.openapi.components.impl.platformcomponentmanagerimpl.handleinitcomponenterror(platformcomponentmanagerimpl.java:39)     @ com.intellij.openapi.components.impl.componentmanagerimpl$componentsregistry.loadclasses(componentmanagerimpl.java:441)     @ com.intellij.openapi.components.impl.componentmanagerimpl$componentsregistry.loadclasses(componentmanagerimpl.java:417)     @ com.intellij.openapi.components.impl.componentmanagerimpl$componentsregistry.access$000(componentmanagerimpl.java:403)     @ com.intellij.openapi.components.impl.componentmanagerimpl.createcomponents(componentmanagerimpl.java:108)     @ com.intellij.openapi.components.impl.componentmanagerimpl.init(componentmanagerimpl.java:87)     @ com.intellij.openapi.components.impl.stores.applicationstoreimpl.load(applicationstoreimpl.java:101)     @ com.intellij.openapi.application.impl.applicationimpl.load(applicationimpl.java:504)     @ com.intellij.openapi.application.impl.applicationimpl.load(applicationimpl.java:486)     @ com.intellij.idea.ideaapplication.run(ideaapplication.java:170)     ... 16 more caused by: java.lang.unsupportedclassversionerror: org/apache/http/conn/ssl/x509hostnameverifier : unsupported major.minor version 51.0     @ java.lang.classloader.defineclass1(native method)     @ java.lang.classloader.defineclasscond(classloader.java:637)     @ java.lang.classloader.defineclass(classloader.java:621)     @ java.lang.classloader.defineclass(classloader.java:471)     @ com.intellij.util.lang.urlclassloader._defineclass(urlclassloader.java:259)     @ com.intellij.util.lang.urlclassloader.defineclass(urlclassloader.java:255)     @ com.intellij.util.lang.urlclassloader.findclass(urlclassloader.java:216)     @ java.lang.classloader.loadclass(classloader.java:306)     @ java.lang.classloader.loadclass(classloader.java:247)     @ java.lang.classloader.defineclass1(native method)     @ java.lang.classloader.defineclasscond(classloader.java:637)     @ java.lang.classloader.defineclass(classloader.java:621)     @ java.lang.classloader.defineclass(classloader.java:471)     @ com.intellij.util.lang.urlclassloader._defineclass(urlclassloader.java:259)     @ com.intellij.util.lang.urlclassloader.defineclass(urlclassloader.java:255)     @ com.intellij.util.lang.urlclassloader.findclass(urlclassloader.java:216)     @ java.lang.classloader.loadclass(classloader.java:306)     @ java.lang.classloader.loadclass(classloader.java:247)     @ com.intellij.util.net.ssl.certificatemanager.<clinit>(certificatemanager.java:81)     @ java.lang.class.forname0(native method)     @ java.lang.class.forname(class.java:249)     @ com.intellij.openapi.components.impl.componentmanagerimpl$componentsregistry.loadclasses(componentmanagerimpl.java:427)     ... 24 more 

edit: os mac ,the android studio versison 1.3 beta 1.0

oh,i solved it. solution delete /library/java/extensions directory