Javaでドローエディタを作成する際にerrorが発生してしまう.

前提

Javaでドローエディタを作成し,コンパイルしてファイルを作成し,ドローエディタをクリックするとエラーメッセージが表示されて描画できない.

実現したいこと

ドローエディタを作成したい.

発生している問題・エラーメッセージ

Exception in thread "AWT-EventQueue-0" java.lang.NullPointerException: Cannot invoke "Figure.draw(java.awt.Graphics)" because "<local4>" is null at ViewPanel.paintComponent(DrawFrame.java:177) at java.desktop/javax.swing.JComponent.paint(JComponent.java:1128) at java.desktop/javax.swing.JComponent.paintToOffscreen(JComponent.java:5318) at java.desktop/javax.swing.RepaintManager$PaintManager.paintDoubleBufferedImpl(RepaintManager.java:1656) at java.desktop/javax.swing.RepaintManager$PaintManager.paintDoubleBuffered(RepaintManager.java:1631) at java.desktop/javax.swing.RepaintManager$PaintManager.paint(RepaintManager.java:1569) at java.desktop/javax.swing.RepaintManager.paint(RepaintManager.java:1336) at java.desktop/javax.swing.JComponent._paintImmediately(JComponent.java:5266) at java.desktop/javax.swing.JComponent.paintImmediately(JComponent.java:5076) at java.desktop/javax.swing.RepaintManager$4.run(RepaintManager.java:878) at java.desktop/javax.swing.RepaintManager$4.run(RepaintManager.java:861) at java.base/java.security.AccessController.doPrivileged(AccessController.java:399) at java.base/java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:86) at java.desktop/javax.swing.RepaintManager.paintDirtyRegions(RepaintManager.java:861) at java.desktop/javax.swing.RepaintManager.paintDirtyRegions(RepaintManager.java:834) at java.desktop/javax.swing.RepaintManager.prePaintDirtyRegions(RepaintManager.java:784) at java.desktop/javax.swing.RepaintManager$ProcessingRunnable.run(RepaintManager.java:1897) at java.desktop/java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:318) at java.desktop/java.awt.EventQueue.dispatchEventImpl(EventQueue.java:773) at java.desktop/java.awt.EventQueue$4.run(EventQueue.java:720) at java.desktop/java.awt.EventQueue$4.run(EventQueue.java:714) at java.base/java.security.AccessController.doPrivileged(AccessController.java:399) at java.base/java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:86) at java.desktop/java.awt.EventQueue.dispatchEvent(EventQueue.java:742) at java.desktop/java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:203) at java.desktop/java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:124) at java.desktop/java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:113) at java.desktop/java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:109) at java.desktop/java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:101) at java.desktop/java.awt.EventDispatchThread.run(EventDispatchThread.java:90)