Java examples for Swing:JTextComponent
Sharing a Document Between JTextComponents
import javax.swing.JTextArea; import javax.swing.text.JTextComponent; public class Main { public static void main(String[] args) throws Exception { JTextComponent textComp1 = new JTextArea(); JTextComponent textComp2 = new JTextArea(); textComp2.setDocument(textComp1.getDocument()); }// ww w. j av a 2 s. c o m }