问题描述

Exception in thread "AWT-EventQueue-0" java.lang.NullPointerException:
at java.util.Objects.requireNonNull(Objects.java:228)
at com.company.view.MainView.actionPerformed(MainView.java:295)
at javax.swing.AbstractButton.fireActionPerformed(AbstractButton.java:2022)
at javax.swing.AbstractButton$Handler.actionPerformed(AbstractButton.java:2348)
at javax.swing.DefaultButtonModel.fireActionPerformed(DefaultButtonModel.java:402)
at javax.swing.DefaultButtonModel.setPressed(DefaultButtonModel.java:259)
at javax.swing.plaf.basic.BasicButtonListener.mouseReleased(BasicButtonListener.java:252)
at java.awt.Component.processMouseEvent(Component.java:6533)
at javax.swing.JComponent.processMouseEvent(JComponent.java:3324)
at java.awt.Component.processEvent(Component.java:6298)
at java.awt.Container.processEvent(Container.java:2236)
at java.awt.Component.dispatchEventImpl(Component.java:4889)

重现步骤

期望效果

实际效果

环境信息

操作系统：Windows 10
浏览器：Chrome
分辨率：1366*768
语言：zh-CN