我安裝了 apache-jmeter-5.1.1 和 java 1.8.0_221 (8)，并通過入門指南在 GUI 中構建 Web 測試計劃。但是當我單擊保存以保存測試計劃時，我收到以下錯誤：未捕獲的異常 java.lang.NoClassDefFoundError：無法初始化類 org.apache.jmeter.gui.util.FileDialoger。有關詳細信息，請參閱日志文件。調試器中的完整輸出：2019-07-24 15:30:13,306 ERROR o.a.j.JMeter: Uncaught exception: java.lang.NoClassDefFoundError: Could not initialize class org.apache.jmeter.gui.util.FileDialoger    at org.apache.jmeter.gui.action.Save.computeFileName(Save.java:203) ~[ApacheJMeter_core.jar:5.1.1 r1855137]    at org.apache.jmeter.gui.action.Save.doAction(Save.java:165) ~[ApacheJMeter_core.jar:5.1.1 r1855137]    at org.apache.jmeter.gui.action.ActionRouter.performAction(ActionRouter.java:88) ~[ApacheJMeter_core.jar:5.1.1 r1855137]    at org.apache.jmeter.gui.action.ActionRouter.lambda$actionPerformed$0(ActionRouter.java:70) ~[ApacheJMeter_core.jar:5.1.1 r1855137]    at java.awt.event.InvocationEvent.dispatch(Unknown Source) ~[?:1.8.0_221]    at java.awt.EventQueue.dispatchEventImpl(Unknown Source) ~[?:1.8.0_221]    at java.awt.EventQueue.access$500(Unknown Source) ~[?:1.8.0_221]    at java.awt.EventQueue$3.run(Unknown Source) ~[?:1.8.0_221]    at java.awt.EventQueue$3.run(Unknown Source) ~[?:1.8.0_221]    at java.security.AccessController.doPrivileged(Native Method) ~[?:1.8.0_221]    at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(Unknown Source) ~[?:1.8.0_221]    at java.awt.EventQueue.dispatchEvent(Unknown Source) ~[?:1.8.0_221]    at java.awt.EventDispatchThread.pumpOneEventForFilters(Unknown Source) [?:1.8.0_221]    at java.awt.EventDispatchThread.pumpEventsForFilter(Unknown Source) [?:1.8.0_221]    at java.awt.EventDispatchThread.pumpEventsForHierarchy(Unknown Source) [?:1.8.0_221]    at java.awt.EventDispatchThread.pumpEvents(Unknown Source) [?:1.8.0_221]    at java.awt.EventDispatchThread.pumpEvents(Unknown Source) [?:1.8.0_221]    at java.awt.EventDispatchThread.run(Unknown Source) [?:1.8.0_221]知道如何解決嗎？