安装eclipse的错误

selar

安装了JAVA 和eclipse 启动eclipse有如下错误，这是什么错误啊。
org.osgi.framework.BundleException: Unable to find system bundle manifest file.
        at org.eclipse.osgi.framework.adaptor.core.SystemBundleData.createManifest(SystemBundleData.java:73)
        at org.eclipse.osgi.framework.adaptor.core.SystemBundleData.<init>(SystemBundleData.java:34)
        at org.eclipse.osgi.framework.adaptor.core.AbstractFrameworkAdaptor.createSystemBundleData(AbstractFrameworkAdaptor.java:294)
        at org.eclipse.osgi.framework.internal.core.SystemBundle.<init>(SystemBundle.java:41)
        at org.eclipse.osgi.framework.internal.core.Framework.createSystemBundle(Framework.java:187)
        at org.eclipse.osgi.framework.internal.core.Framework.initialize(Framework.java:152)
        at org.eclipse.osgi.framework.internal.core.Framework.<init>(Framework.java:95)
        at org.eclipse.osgi.framework.internal.core.OSGi.createFramework(OSGi.java:90)
        at org.eclipse.osgi.framework.internal.core.OSGi.<init>(OSGi.java:31)
        at org.eclipse.core.runtime.adaptor.EclipseStarter.startup(EclipseStarter.java:215)
        at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:127)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
        at java.lang.reflect.Method.invoke(Method.java:324)
        at org.eclipse.core.launcher.Main.basicRun(Main.java:185)
        at org.eclipse.core.launcher.Main.run(Main.java:704)
        at org.eclipse.core.launcher.Main.main(Main.java:688)