java以相反的顺序在textarea文本文件中打印

Question

I'm using this code, it runs well but i need to add " \\n " to each line

private void jButton2ActionPerformed(java.awt.event.ActionEvent evt) {                                         
    filename = "Reverse.txt";
    file = new File(filename);
    try (final Stream<String> lines = Files.lines(Paths.get(filename))) {
        lines.collect(Collectors.toCollection(LinkedList::new))
        .descendingIterator()
        .forEachRemaining(jTextArea1::append); // <<<<<<< need "\n"
    }   
    catch (IOException ex) {                
        Logger.getLogger(TextAreaReverseReadFrame.class.getName()).log(Level.SEVERE, null, ex);
    }                
} 

Answer 1

You can transform each line at source, meaning adding a map instruction just before the collect one:

lines.map(element -> element + '\n').collect(Collectors.toCollection(LinkedList::new)).descendingIterator()
                .forEachRemaining(testBuilder::append);

Answer 2

Simply try to change

.forEachRemaining(jTextArea1::append);

to:

.forEachRemaining(singleLine -> jTextArea1.append(singleLine  + "\n"));