at first the scroll bar is invisible but when the text inside becomes long enough, it appears.
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import javax.swing.*;
import java.awt.BorderLayout;
public class Main extends JFrame{
Main(){
JTextArea textarea = new JTextArea("This is JTextArea");
JScrollPane scrollpane = new JScrollPane(); //Scroll bar
scrollpane.setViewportView(textarea);
getContentPane().add(scrollpane, BorderLayout.CENTER);
}
public static void main(String[] args) {
Main frame = new Main();
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setBounds(10, 10, 300, 200);
frame.setTitle("Title");
frame.setVisible(true);
}
}
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