View difference between Paste ID: TVfcSPxQ and GXyP6UZB

 import java.awt.*;
 import javax.swing.*;
 
 public class TextAreaDemoB extends JFrame {
         //============================================== instance variables
         JTextArea _resultArea = new JTextArea(6, 20);
 
         //====================================================== constructor
         public TextAreaDemoB() {
                 String[] words = {"my","text","area"};
 
                 for(String W : words)
-                        _resultArea.setText(W + "\n");
+                        _resultArea.append(W + "\n");
                 JScrollPane scrollingArea = new JScrollPane(_resultArea);
 
                 //... Get the content pane, set layout, add to center
                 JPanel content = new JPanel();
                 content.setLayout(new BorderLayout());
                 content.add(scrollingArea, BorderLayout.CENTER);
 
                 //... Set window characteristics.
                 this.setContentPane(content);
                 this.setTitle("TextAreaDemo B");
                 this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
                 this.pack();
         }
 
         //============================================================= main
         public static void main(String[] args) {
                 JFrame win = new TextAreaDemoB();
                 win.setVisible(true);
         }
 }