RCP 项目运行时发生No Application Id found 等错误

 

错误示例：

java.lang.RuntimeException: Application "rcp.demo.application" could not be found in the registry. The applications available are: org.eclipse.equinox.app.error.

       at org.eclipse.equinox.internal.app.EclipseAppContainer.startDefaultApp(EclipseAppContainer.java:242)

       at org.eclipse.equinox.internal.app.MainApplicationLauncher.run(MainApplicationLauncher.java:29)

       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:386)

       at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:179)

       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:549)

       at org.eclipse.equinox.launcher.Main.basicRun(Main.java:504)

       at org.eclipse.equinox.launcher.Main.run(Main.java:1236)

       at org.eclipse.equinox.launcher.Main.main(Main.java:1212)

这种错误常常发生在对plugin.xml 修改、切换Target Platform时，明明已经有org.eclipse.core.runtime.applications Extension了，可还显示找不到。其实这个问题在于运行配置或者目标平台没有及时同步，简单的解决方法为打开Preference——Plug-in Development——Target Platform，选择当前的目标平台，reload一下。然后到Run——Run Configuration 下，选中当前的运行配置实例，刷新一下Plug-in 标签栏下的内容，再次启动就OK了。