My eclipse is not opening.. Why?

I have been using eclipse from a couple of months and even today morning i worked on a java project but in the evening when i tried to open eclipse.exe, It just showed the loading screen for few seconds and disappeared. Can anybody please tell me the solution? this is my eclipse.ini ``` -startup plugins/org.eclipse.equinox.launcher_1.3.0.v20120522-1813.jar --launcher.library plugins/org.eclipse.equinox.launcher.win32.win32.x86_1.1.200.v20120913-144807 -product com.android.ide.eclipse.adt.package.product --launcher.XXMaxPermSize 256M -showsplash com.android.ide.eclipse.adt.package.product --launcher.XXMaxPermSize 256m --launcher.defaultAction openFile -vmargs -Dosgi.requiredJavaVersion=1.6 -Xms40m -Xmx768m -Declipse.buildId=v22.3.0-887826 -XX:MaxPermSize=512M ``` and this is the log ``` !ENTRY org.eclipse.ui 4 0 2014-03-21 22:25:26.046 !MESSAGE Error occurred during status handling !STACK 0 java.lang.NullPointerException at org.eclipse.ui.internal.statushandlers.StatusHandlerRegistry.<init>(StatusHandlerRegistry.java:72) at org.eclipse.ui.internal.statushandlers.StatusHandlerRegistry.getDefault(StatusHandlerRegistry.java:91) at org.eclipse.ui.statushandlers.StatusManager.getStatusHandler(StatusManager.java:135) at org.eclipse.ui.statushandlers.StatusManager.handle(StatusManager.java:189) at org.eclipse.ui.statushandlers.StatusManager.handle(StatusManager.java:231) at org.eclipse.ui.statushandlers.StatusManager$StatusManagerLogListener.logging(StatusManager.java:305) at org.eclipse.core.internal.runtime.RuntimeLog.logToListeners(RuntimeLog.java:160) at org.eclipse.core.internal.runtime.PlatformLogWriter.logged(PlatformLogWriter.java:100) at org.eclipse.equinox.log.internal.ExtendedLogReaderServiceFactory.safeLogged(ExtendedLogReaderServiceFactory.java:86) at org.eclipse.equinox.log.internal.ExtendedLogReaderServiceFactory.logPrivileged(ExtendedLogReaderServiceFactory.java:205) at org.eclipse.equinox.log.internal.ExtendedLogReaderServiceFactory.log(ExtendedLogReaderServiceFactory.java:178) at org.eclipse.equinox.log.internal.ExtendedLogServiceFactory.log(ExtendedLogServiceFactory.java:65) at org.eclipse.equinox.log.internal.ExtendedLogServiceImpl.log(ExtendedLogServiceImpl.java:87) at org.eclipse.equinox.log.internal.LoggerImpl.log(LoggerImpl.java:54) at org.eclipse.core.internal.runtime.Log.log(Log.java:62) at org.eclipse.ui.internal.WorkbenchPlugin.log(WorkbenchPlugin.java:813) at org.eclipse.ui.internal.EarlyStartupRunnable.handleException(EarlyStartupRunnable.java:81) at org.eclipse.core.runtime.SafeRunner.handleException(SafeRunner.java:75) at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:44) at org.eclipse.ui.internal.Workbench$54.run(Workbench.java:2412) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:53) ```