java - JTextArea Document Listener updating text -

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i have jtextarea , i'd listen when user pastes text in jtextarea. specifically, i'd following:

get text pasted, remove whitespaces, , replace jtextarea text edited text without spaces (rather original text user pasted).

how can using documentlistener, , avoiding java.lang.unsupportedoperationexception: not supported yet., comes result of following code:

public void insertupdate(documentevent de) {          final string replace = jtextarea1.gettext().replaceall("\\s","");          swingutilities.invokelater(new runnable() {             public void run() {             jtextarea1.settext(replace);             }          });      }

i haven't issue method insertupdate(documentevent documentevent), sure jtextarea can accepting chars input, if you'll have issue use jeditorpane, there can importing java awt , swing objects too

code example

private documentlistener doclistener = new documentlistener() {      @override     public void changedupdate(documentevent documentevent) {         printit(documentevent);     }      @override     public void insertupdate(documentevent documentevent) {         printit(documentevent);     }      @override     public void removeupdate(documentevent documentevent) {         printit(documentevent);     }      private void printit(documentevent documentevent) {         documentevent.eventtype type = documentevent.gettype();         //your code     } };

for replacing inserted characters have add documentfilter


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