java - JTextArea not updating dynamically -

i have jtextarea inside class want update dynamically. displaying text append after processing done. have tried implement following fix it:

public newconsole(){      initcomponents();  }  public void write(final string s){         swingutilities.invokelater(new runnable() {              public void run() {                 textarea.append(s);              }           });     } 

console gets instantiated in parent class as:

protected newconsole console = new newconsole(); 

and output it, children call:

console.write("append this.."); 

edit: here's more information:

public abstract class parent{      protected newconsole console = new newconsole();       public parent(){}       protected abstract int dosomething(); }  public class child extends parent{       public child(){           console.write("i want update dynamically");           dosomething();           console.write("and this..");      }            public int dosomething(){           //quite intensive processing here      } } 

the intensive processing done in dosomething blocking edt, preventing ui updates. use swingworker instead perform functionality.

use execute start worker. move required calls console.write either doinbackground or done.