如何在DocumenListener中读取最后一个单词或最后一行

Question

I implement DocumentListener for JEditorPane ( need help with method insertUpdate(DocumentEvent e) ). How to read last word or last line (lines are separated by '\\n' and words are separated by ' ' ) ?

Answer 1

Utilities class can be used with formatted content eg html

public static final int getWordStart(JTextComponent c, int offs) throws BadLocationException 
public static final int getWordEnd(JTextComponent c, int offs) throws BadLocationException 

Answer 2

To get the last line in your JEditorPane, split the text in the editor on \\n as shown below:

String text = editor.getText();
String[] lines = text.split("\n");
String lastLine = lines[lines.length-1];
System.out.println("Last line: " + lastLine);

Similarly, to get the last word, split the last line on space.