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HTML Editor (part 22)

Java Multithreading, Level 8, Lesson 15

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Please help JFileChhoser.showSaveDialog() condition not satisfying,

In the controller, let's implement the saveDocumentAs() method for saving the file under a new name.
The implementation should:
22.1. Switch the view to the HTML tab.
22.2. Create a new JFileChooser object.
22.3. Set an HTMLFileFilter object as its filter.
22.4. Show the "Save File" file chooser dialog.
22.5. If the user confirms the file selection:
22.5.1. Save the selected file in the currentFile field.
22.5.2. Set the file name as the window title on the view.
22.5.3. Create a FileWriter based on currentFile.
22.5.4. Copy the data from document to the FileWriter object by analogy with what we did in the getPlainText() method.
22.6. The method must not throw exceptions.
Check the Save as... menu item.

Requirements:

The saveDocumentAs() method in the controller should switch the view to the HTML tab.
The saveDocumentAs() method in the controller should create a new JFileChooser object.
The saveDocumentAs() method in the controller should set an HTMLFileFilter object as the filter on the JFileChooser object.
The saveDocumentAs() method in the controller should use the JFileChooser.showSaveDialog() method to show the "Save File" file chooser dialog.
The saveDocumentAs() method in the controller should save the selected file in the currentFile field if the user confirms the file selection.
The saveDocumentAs() method in the controller should set the file name as the window title on the view if the user confirms the file selection.
The saveDocumentAs() method in the controller should create a FileWriter based on currentFile if the user confirms the file selection.
The saveDocumentAs() method in the controller should use HTMLEditorKit to copy the data from document to the FileWriter object if the user confirms the file selection.
The saveDocumentAs() method in the controller should not throw exceptions. It should only log them using ExceptionHandler.

package com.codegym.task.task32.task3209; import javax.swing.*; import javax.swing.text.html.HTMLDocument; import javax.swing.text.html.HTMLEditorKit; import java.io.File; import java.io.FileWriter; import java.io.StringReader; import java.io.StringWriter; public class Controller { private View view; private HTMLDocument document; private File currentFile; public Controller(View view) { this.view = view; } public HTMLDocument getDocument() { return this.document; } public void init(){ createNewDocument(); } public void resetDocument(){ if(document != null){ document.removeUndoableEditListener(view.getUndoListener()); } HTMLEditorKit kit = new HTMLEditorKit(); document = (HTMLDocument)kit.createDefaultDocument(); document.addUndoableEditListener(view.getUndoListener()); view.update(); } public void setPlainText(String text){ try{ resetDocument(); StringReader reader = new StringReader(text); HTMLEditorKit kit = new HTMLEditorKit(); kit.read(reader,document,0); }catch (Exception e){ ExceptionHandler.log(e); } } public String getPlainText(){ String text = " "; try{ StringWriter writer = new StringWriter(); HTMLEditorKit kit = new HTMLEditorKit(); kit.write(writer,document,0,document.getLength()); text = writer.toString(); }catch (Exception e){ ExceptionHandler.log(e); } return text; } public void createNewDocument(){ view.selectHtmlTab(); resetDocument(); view.setTitle("HTML editor"); view.resetUndo(); currentFile = null; } public void saveDocument(){ } public void openDocument(){ } public void saveDocumentAs(){ try{ view.selectHtmlTab(); HTMLFileFilter fileFilter = new HTMLFileFilter(); JFileChooser fileChooser = new JFileChooser(); fileChooser.setFileFilter(fileFilter); int retrn = fileChooser.showSaveDialog(null); if(retrn == JFileChooser.APPROVE_OPTION){ currentFile = fileChooser.getSelectedFile(); view.setTitle(currentFile.getName()); FileWriter writer = new FileWriter(currentFile); HTMLEditorKit kit = new HTMLEditorKit(); kit.write(writer,document,0,document.getLength()); } }catch (Exception e){ ExceptionHandler.log(e); } } public static void main(String[] args) { View view = new View(); Controller ct = new Controller(view); view.setController(ct); view.init(); ct.init(); } public void exit(){ System.exit(0); } }

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Seb

Level 41 , Crefeld, Germany

7 February 2020, 16:12

Two things: First of all, in order to properly write your file, you should close the FileWriter writer after line 92. And second - the main issue here is line 85. Do not pass in "null" to the showSaveDialog, pass in the "view" object instead. That should be it. ;-)