Java programming part 81 GUI : JScrollPane

Java Programming tutorial, GUI, Graphical User Interface. this tutorial is teaching. How to use Swings JScrollPane to scroll The text on JTeatArea with the line numbers also moving with the text.


import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.FlowLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.io.File;

import javax.swing.*;

public class UserFrame extends JFrame implements ActionListener{
public static String name = "charles";
public static JMenuItem print;
public static JButton jb11;

public static ImageIcon icon1;
public static ImageIcon icon2;
public static ImageIcon icon3;
public static ImageIcon icon4;
public static ImageIcon icon5;
public static ImageIcon icon6;
public static ImageIcon icon7;
public static JCheckBox tbox;
public static JRadioButton rbut;

public static JTextArea area;
public static JTextArea lineNumbers;

public static JComboBox combo;
public static JList list;

UserFrame(){
setTitle("UsersFrame");
setSize(600,550);

}


public static void main(String[] args){
File dir = new File("C:");
String[] FoldersAndFiles = dir.list();

UserFrame f = new UserFrame();
JMenuBar bar = new JMenuBar();
bar.setToolTipText("this is the manu bar please use this carefully");
JToolBar tb = new JToolBar();
tb.setToolTipText("This is a too bar");
tb.setLayout(new FlowLayout());
icon1 = new ImageIcon("src\\Paint-icon.png");
icon2 = new ImageIcon("src\\stop-icon.png");
icon3 = new ImageIcon("src\\shield-icon.png");
icon4 = new ImageIcon("src\\repair-icon.png");
icon5 = new ImageIcon("src\\sunset-icon.png");
icon6 = new ImageIcon("src\\strawberry-icon.png");
icon7 = new ImageIcon("src\\girl-icon.png");

tbox = new JCheckBox("What");
rbut = new JRadioButton("Why");

area = new JTextArea();
lineNumbers = new JTextArea(20,1);
lineNumbers.setBackground(Color.YELLOW);



combo = new JComboBox();
combo.addItem("Plain");
combo.addItem("Fancy");
combo.addItem("Official");
combo.addActionListener(f);

jb11 = new JButton(icon1);
jb11.addActionListener(f);
jb11.setToolTipText("this button has a tool tip, please read!");
JButton jb12 = new JButton(icon2);
JButton jb13 = new JButton(icon3);
JButton jb14 = new JButton(icon4);
JButton jb15 = new JButton(icon5);
JButton jb16 = new JButton(icon6);
JButton jb17 = new JButton(icon7);
JMenu fileMenu = new JMenu("File");
JMenu editMenu = new JMenu("Edit");
print = new JMenuItem("print name");
JMenuItem print2 = new JMenuItem("print nothen");
print.addActionListener(f);
fileMenu.add(print);
fileMenu.add(print2);
bar.add(fileMenu);
bar.add(editMenu);
f.setJMenuBar(bar);


tb.add(jb11);
tb.add(jb12);
tb.add(jb13);
tb.add(jb14);
tb.add(jb15);
tb.add(jb16);
tb.add(jb17);
//tb.add(tbox);
tb.add(rbut);
tb.add(combo);

JPanel pan = new JPanel();
JPanel pan2 = new JPanel();
pan2.setLayout(new BorderLayout());
pan.setLayout(new BorderLayout());
pan.add(tb,BorderLayout.NORTH);
pan.add(pan2,BorderLayout.CENTER);
pan2.add(area,BorderLayout.CENTER);
pan2.add(lineNumbers,BorderLayout.WEST);
JScrollPane scroll = new JScrollPane(pan);
f.add(scroll);
f.setDefaultCloseOperation(EXIT_ON_CLOSE);
f.setVisible(true);
}


@Override
public void actionPerformed(ActionEvent e) {
// TODO Auto-generated method stub

Object c = (Object) e.getSource();

if(c==combo){
JComboBox cb = (JComboBox) e.getSource();
String passed = (String) cb.getSelectedItem();
System.out.println(passed);
}
if(c==jb11){
System.out.println("Charles");
}
if(c==print){
System.out.println("The menu item");
}


}
}