adt中的eclipse打不开解决方法

adt中的eclipse打不开解决方法：（推荐：eclipse使用教程）

错误日志：

org.eclipse.swt.SWTException: Failed to execute runnable (java.lang.NullPointerException)
    at org.eclipse.swt.SWT.error(SWT.java:4361)
    at org.eclipse.swt.SWT.error(SWT.java:4276)
    at org.eclipse.swt.widgets.Synchronizer.runAsyncMessages(Synchronizer.java:138)
    at org.eclipse.swt.widgets.Display.runAsyncMessages(Display.java:4144)
    at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3761)
    at org.eclipse.swt.widgets.Display.release(Display.java:3814)
    at org.eclipse.swt.graphics.Device.dispose(Device.java:295)
    at org.eclipse.ui.internal.ide.application.IDEApplication.start(IDEApplication.java:140)
    at org.eclipse.equinox.internal.app.EclipseAppHandle.run(EclipseAppHandle.java:196)
    at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.runApplication(EclipseAppLauncher.java:110)
    at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.start(EclipseAppLauncher.java:79)
    at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:353)
    at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:180)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
    at java.lang.reflect.Method.invoke(Unknown Source)
    at org.eclipse.equinox.launcher.Main.invokeFramework(Main.java:629)
    at org.eclipse.equinox.launcher.Main.basicRun(Main.java:584)
    at org.eclipse.equinox.launcher.Main.run(Main.java:1438)
    at org.eclipse.equinox.launcher.Main.main(Main.java:1414)
Caused by: java.lang.NullPointerException
    at org.eclipse.ui.internal.Workbench.createWorkbenchWindow(Workbench.java:1232)
    at org.eclipse.ui.internal.Workbench.getActiveWorkbenchWindow(Workbench.java:1225)
    at org.eclipse.cdt.codan.internal.ui.cxx.Startup$1.run(Startup.java:44)
    at org.eclipse.swt.widgets.RunnableLock.run(RunnableLock.java:35)
    at org.eclipse.swt.widgets.Synchronizer.runAsyncMessages(Synchronizer.java:135)
    ... 18 more

解决方法：

删除文件 workspace/.metadata/.plugins/org.eclipse.e4.workbench/workbench.xmi

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