如何无限期地刷新JavaAWT中的主框架，使其能够接受请求？

我有3个动作要执行的第一帧

主帧：
选择选项：

执行操作1

执行行动2

执行行动3

选择每个选项将显示更多的帧/表格。 新打开的帧我选择

HIDE\u ON\u CLOSE

作为操作。对于主框架，它是

EXIT\u ON\u CLOSE

我的问题描述如下：
当我选择say选项2时，我可以通过帧传播并关闭新打开的帧（Home_帧除外）
接下来我想选择选项3，然后我得到以下异常

Exception in thread "AWT-EventQueue-0" java.lang.NullPointerException
at spark.cass.rw.SparkAPI_nodeGen.sm_loadArray(SparkAPI_nodeGen.java:138)
at spark.cass.rw.SparkAPI_nodeGen.sm_ExtractToArray(SparkAPI_nodeGen.java:98)
at spark.cass.rw.SparkAPI_nodeGen.getAll_NodeFaultsInfo(SparkAPI_nodeGen.java:43)
at gen.node.data.FilterNodeData.getNodes(FilterNodeData.java:85)
at gen.node.data.FilterNodeData.plotGM_pdf(FilterNodeData.java:110)
at gen.GUI.src.Plot_main.selectGMGUI(Plot_main.java:115)
at gen.GUI.src.GMFrame$ALsubmit.actionPerformed(GMFrame.java:107)
at javax.swing.JComboBox.fireActionEvent(Unknown Source)
at javax.swing.JComboBox.setSelectedItem(Unknown Source)
at javax.swing.JComboBox.setSelectedIndex(Unknown Source)
at javax.swing.plaf.basic.BasicComboPopup$Handler.mouseReleased(Unknown Source)
at java.awt.AWTEventMulticaster.mouseReleased(Unknown Source)
at java.awt.Component.processMouseEvent(Unknown Source)
at javax.swing.JComponent.processMouseEvent(Unknown Source)
at javax.swing.plaf.basic.BasicComboPopup$1.processMouseEvent(Unknown Source)
at java.awt.Component.processEvent(Unknown Source)
at java.awt.Container.processEvent(Unknown Source)
at java.awt.Component.dispatchEventImpl(Unknown Source)
at java.awt.Container.dispatchEventImpl(Unknown Source)
at java.awt.Component.dispatchEvent(Unknown Source)
at java.awt.LightweightDispatcher.retargetMouseEvent(Unknown Source)
at java.awt.LightweightDispatcher.processMouseEvent(Unknown Source)
at java.awt.LightweightDispatcher.dispatchEvent(Unknown Source)
at java.awt.Container.dispatchEventImpl(Unknown Source)
at java.awt.Window.dispatchEventImpl(Unknown Source)
at java.awt.Component.dispatchEvent(Unknown Source)
at java.awt.EventQueue.dispatchEventImpl(Unknown Source)
at java.awt.EventQueue.access$200(Unknown Source)
at java.awt.EventQueue$3.run(Unknown Source)
at java.awt.EventQueue$3.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.ProtectionDomain$1.doIntersectionPrivilege(Unknown Source)
at java.security.ProtectionDomain$1.doIntersectionPrivilege(Unknown Source)
at java.awt.EventQueue$4.run(Unknown Source)
at java.awt.EventQueue$4.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.ProtectionDomain$1.doIntersectionPrivilege(Unknown Source)
at java.awt.EventQueue.dispatchEvent(Unknown Source)
at java.awt.EventDispatchThread.pumpOneEventForFilters(Unknown Source)
at java.awt.EventDispatchThread.pumpEventsForFilter(Unknown Source)
at java.awt.EventDispatchThread.pumpEventsForHierarchy(Unknown Source)
at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
at java.awt.EventDispatchThread.run(Unknown Source)

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我不知道如何用技术术语来描述这个问题。希望我已经正确地表达了我的想法。

“新打开的框架…”它们可能应该是模态对话框。模态组件将阻止代码流，直到解除。1） 请参阅2）如需更快获得更好的帮助，请发布or。3） 请参阅&谢谢Andrew Thompson链接很有用，我已经能够解决我的问题。“新打开的框架…”它们可能应该是模态对话框。模态组件将阻止代码流，直到解除。1） 请参阅2）如需更快获得更好的帮助，请发布or。3） 见&谢谢安德鲁·汤普森，链接很有用，我已经解决了我的问题。