Now implement the handler for the menu File + New. The text area for preparing the Groovy script…

Now implement the handler for the menu File + New. The text area for preparing the Groovy script should be a scrolled editor pane. Initially, the tab is decorated as Edit1, Edit2, and so on. Add a specialized Document Listener to the editor pane so that if the content of the text document is modified, then the tab is decorated with an + as in + Edit1. See Figure. Now implement the handler for File + Open. Here, use a JFileChooser to invite the user to nominate the +groovy file to open. The file is presented in a scrolled editor pane with the tab having the file name. Again, associate a Document Listener as for a new file. Continue by implementing File + SaveAs and File + Save menus. The handler for File + Save will call the File + SaveAs handler if the tab includes Edit or * Edit as the tab prefix. Again, a JFileChooser will invite the user to nominate the name and location of the file. This will apply if the tab is Edit or * Edit. Otherwise, the name in the tab is used to update the current file.

Now implement the handler for the menu File + New. The text area for preparing the Groovy script...

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