Java by API/javax.swing/JScrollBar
Содержание
- 1 JScrollBar: addAdjustmentListener(AdjustmentListener l)
- 2 JScrollBar: getBlockIncrement(int direction)
- 3 JScrollBar: getMinimum()
- 4 JScrollBar: getModel()
- 5 JScrollBar: getUnitIncrement(int direction)
- 6 JScrollBar.HORIZONTAL
- 7 JScrollBar: setBlockIncrement(int blockIncrement)
- 8 JScrollBar: setFocusable(boolean focusable)
- 9 JScrollBar: setUnitIncrement(int unitIncrement)
- 10 JScrollBar: setValue(int value)
- 11 new JScrollBar(int orientation)
- 12 new JScrollBar(int orientation, int value, int extent, int min, int max)
JScrollBar: addAdjustmentListener(AdjustmentListener l)
<source lang="java">
import java.awt.BorderLayout; import java.awt.event.AdjustmentEvent; import java.awt.event.AdjustmentListener; import javax.swing.JFrame; import javax.swing.JScrollBar; public class MainClass {
public static void main(String args[]) throws Exception {
AdjustmentListener adjustmentListener = new AdjustmentListener() {
public void adjustmentValueChanged(AdjustmentEvent adjustmentEvent) {
System.out.println("Adjusted: " + adjustmentEvent.getValue());
}
};
JScrollBar oneJScrollBar = new JScrollBar(JScrollBar.HORIZONTAL);
oneJScrollBar.addAdjustmentListener(adjustmentListener);
JFrame frame = new JFrame("ScrollBars R Us");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.add(oneJScrollBar, BorderLayout.NORTH);
frame.setSize(300, 200);
frame.setVisible(true);
}
}
</source>
JScrollBar: getBlockIncrement(int direction)
<source lang="java">
/*
*
* Copyright (c) 1998 Sun Microsystems, Inc. All Rights Reserved.
*
* Sun grants you ("Licensee") a non-exclusive, royalty free, license to use,
* modify and redistribute this software in source and binary code form,
* provided that i) this copyright notice and license appear on all copies of
* the software; and ii) Licensee does not utilize the software in a manner
* which is disparaging to Sun.
*
* This software is provided "AS IS," without a warranty of any kind. ALL
* EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND WARRANTIES, INCLUDING ANY
* IMPLIED WARRANTY OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE OR
* NON-INFRINGEMENT, ARE HEREBY EXCLUDED. SUN AND ITS LICENSORS SHALL NOT BE
* LIABLE FOR ANY DAMAGES SUFFERED BY LICENSEE AS A RESULT OF USING, MODIFYING
* OR DISTRIBUTING THE SOFTWARE OR ITS DERIVATIVES. IN NO EVENT WILL SUN OR ITS
* LICENSORS BE LIABLE FOR ANY LOST REVENUE, PROFIT OR DATA, OR FOR DIRECT,
* INDIRECT, SPECIAL, CONSEQUENTIAL, INCIDENTAL OR PUNITIVE DAMAGES, HOWEVER
* CAUSED AND REGARDLESS OF THE THEORY OF LIABILITY, ARISING OUT OF THE USE OF
* OR INABILITY TO USE SOFTWARE, EVEN IF SUN HAS BEEN ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGES.
*
* This software is not designed or intended for use in on-line control of
* aircraft, air traffic, aircraft navigation or aircraft communications; or in
* the design, construction, operation or maintenance of any nuclear
* facility. Licensee represents and warrants that it will not use or
* redistribute the Software for such purposes.
*/
import java.awt.BorderLayout; import java.awt.Dimension; import java.awt.event.MouseWheelEvent; import java.awt.event.MouseWheelListener; import javax.swing.BorderFactory; import javax.swing.JComponent; import javax.swing.JFrame; import javax.swing.JPanel; import javax.swing.JScrollPane; import javax.swing.JTextArea; public class Main extends JPanel implements MouseWheelListener {
JTextArea textArea = new JTextArea();
JScrollPane scrollPane = new JScrollPane(textArea);
final static String newline = "\n";
public Main() {
super(new BorderLayout());
textArea.setEditable(false);
scrollPane.setVerticalScrollBarPolicy(JScrollPane.VERTICAL_SCROLLBAR_ALWAYS);
scrollPane.setPreferredSize(new Dimension(400, 250));
add(scrollPane, BorderLayout.CENTER);
textArea.append("This text area displays information " + "about its mouse wheel events."
+ newline);
textArea.addMouseWheelListener(this);
setPreferredSize(new Dimension(450, 350));
setBorder(BorderFactory.createEmptyBorder(20, 20, 20, 20));
}
public void mouseWheelMoved(MouseWheelEvent e) {
String message;
int notches = e.getWheelRotation();
if (notches < 0) {
message = "Mouse wheel moved UP " + -notches + " notch(es)" + newline;
} else {
message = "Mouse wheel moved DOWN " + notches + " notch(es)" + newline;
}
if (e.getScrollType() == MouseWheelEvent.WHEEL_UNIT_SCROLL) {
message += " Scroll type: WHEEL_UNIT_SCROLL" + newline;
message += " Scroll amount: " + e.getScrollAmount() + " unit increments per notch"
+ newline;
message += " Units to scroll: " + e.getUnitsToScroll() + " unit increments" + newline;
message += " Vertical unit increment: "
+ scrollPane.getVerticalScrollBar().getUnitIncrement(1) + " pixels" + newline;
} else { // scroll type == MouseWheelEvent.WHEEL_BLOCK_SCROLL
message += " Scroll type: WHEEL_BLOCK_SCROLL" + newline;
message += " Vertical block increment: "
+ scrollPane.getVerticalScrollBar().getBlockIncrement(1) + " pixels" + newline;
}
saySomething(message, e);
}
void saySomething(String eventDescription, MouseWheelEvent e) {
textArea.append(e.getComponent().getClass().getName() + ": " + eventDescription);
textArea.setCaretPosition(textArea.getDocument().getLength());
}
public static void main(String[] args) {
JFrame frame = new JFrame("MouseWheelEventDemo");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
JComponent newContentPane = new Main();
newContentPane.setOpaque(true);
frame.setContentPane(newContentPane);
frame.pack();
frame.setVisible(true);
}
}
</source>
JScrollBar: getMinimum()
<source lang="java">
import java.awt.BorderLayout; import java.awt.Color; import java.awt.Dimension; import java.awt.event.ActionEvent; import java.awt.event.ActionListener; import javax.swing.JButton; import javax.swing.JFrame; import javax.swing.JLabel; import javax.swing.JScrollBar; import javax.swing.JScrollPane; import javax.swing.border.LineBorder; public class MainClass {
public static void main(String args[]) throws Exception {
JFrame frame = new JFrame("Cornering Sample");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
JButton button = new JButton("+");
JLabel bigLabel = new JLabel("A");
bigLabel.setPreferredSize(new Dimension(400,400));
bigLabel.setBorder(new LineBorder(Color.red));
JScrollPane scrollPane = new JScrollPane(bigLabel);
scrollPane.setCorner(JScrollPane.UPPER_LEFT_CORNER, button);
scrollPane.setColumnHeaderView(new JLabel("B"));
scrollPane.setRowHeaderView(new JLabel("C"));
ActionListener actionListener = new JScrollPaneToTopAction(scrollPane);
button.addActionListener(actionListener);
frame.add(scrollPane, BorderLayout.CENTER);
frame.setSize(300, 200);
frame.setVisible(true);
}
}
class JScrollPaneToTopAction implements ActionListener {
JScrollPane scrollPane;
public JScrollPaneToTopAction(JScrollPane scrollPane) {
if (scrollPane == null) {
throw new IllegalArgumentException("JScrollPaneToTopAction: null JScrollPane");
}
this.scrollPane = scrollPane;
}
public void actionPerformed(ActionEvent actionEvent) {
JScrollBar verticalScrollBar = scrollPane.getVerticalScrollBar();
JScrollBar horizontalScrollBar = scrollPane.getHorizontalScrollBar();
verticalScrollBar.setValue(verticalScrollBar.getMinimum());
horizontalScrollBar.setValue(horizontalScrollBar.getMinimum());
}
}
</source>
JScrollBar: getModel()
<source lang="java">
import java.awt.BorderLayout; import javax.swing.BoundedRangeModel; import javax.swing.JFrame; import javax.swing.JProgressBar; import javax.swing.JScrollBar; import javax.swing.JSlider; import javax.swing.event.ChangeEvent; import javax.swing.event.ChangeListener; public class MainClass {
public static void main(String args[]) throws Exception {
ChangeListener changeListener = new BoundedChangeListener();
JScrollBar anotherJScrollBar = new JScrollBar(JScrollBar.HORIZONTAL);
BoundedRangeModel model = anotherJScrollBar.getModel();
model.addChangeListener(changeListener);
JFrame frame = new JFrame("ScrollBars R Us");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.add(anotherJScrollBar, BorderLayout.NORTH);
frame.setSize(300, 200);
frame.setVisible(true);
}
} class BoundedChangeListener implements ChangeListener {
public void stateChanged(ChangeEvent changeEvent) {
Object source = changeEvent.getSource();
if (source instanceof BoundedRangeModel) {
BoundedRangeModel aModel = (BoundedRangeModel) source;
if (!aModel.getValueIsAdjusting()) {
System.out.println("Changed: " + aModel.getValue());
}
} else if (source instanceof JSlider) {
JSlider theJSlider = (JSlider) source;
if (!theJSlider.getValueIsAdjusting()) {
System.out.println("Slider changed: " + theJSlider.getValue());
}
} else if (source instanceof JProgressBar) {
JProgressBar theJProgressBar = (JProgressBar) source;
System.out.println("ProgressBar changed: " + theJProgressBar.getValue());
} else {
System.out.println("Something changed: " + source);
}
}
}
</source>
JScrollBar: getUnitIncrement(int direction)
<source lang="java">
/*
*
* Copyright (c) 1998 Sun Microsystems, Inc. All Rights Reserved.
*
* Sun grants you ("Licensee") a non-exclusive, royalty free, license to use,
* modify and redistribute this software in source and binary code form,
* provided that i) this copyright notice and license appear on all copies of
* the software; and ii) Licensee does not utilize the software in a manner
* which is disparaging to Sun.
*
* This software is provided "AS IS," without a warranty of any kind. ALL
* EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND WARRANTIES, INCLUDING ANY
* IMPLIED WARRANTY OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE OR
* NON-INFRINGEMENT, ARE HEREBY EXCLUDED. SUN AND ITS LICENSORS SHALL NOT BE
* LIABLE FOR ANY DAMAGES SUFFERED BY LICENSEE AS A RESULT OF USING, MODIFYING
* OR DISTRIBUTING THE SOFTWARE OR ITS DERIVATIVES. IN NO EVENT WILL SUN OR ITS
* LICENSORS BE LIABLE FOR ANY LOST REVENUE, PROFIT OR DATA, OR FOR DIRECT,
* INDIRECT, SPECIAL, CONSEQUENTIAL, INCIDENTAL OR PUNITIVE DAMAGES, HOWEVER
* CAUSED AND REGARDLESS OF THE THEORY OF LIABILITY, ARISING OUT OF THE USE OF
* OR INABILITY TO USE SOFTWARE, EVEN IF SUN HAS BEEN ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGES.
*
* This software is not designed or intended for use in on-line control of
* aircraft, air traffic, aircraft navigation or aircraft communications; or in
* the design, construction, operation or maintenance of any nuclear
* facility. Licensee represents and warrants that it will not use or
* redistribute the Software for such purposes.
*/
import java.awt.BorderLayout; import java.awt.Dimension; import java.awt.event.MouseWheelEvent; import java.awt.event.MouseWheelListener; import javax.swing.BorderFactory; import javax.swing.JComponent; import javax.swing.JFrame; import javax.swing.JPanel; import javax.swing.JScrollPane; import javax.swing.JTextArea; public class Main extends JPanel implements MouseWheelListener {
JTextArea textArea = new JTextArea();
JScrollPane scrollPane = new JScrollPane(textArea);
final static String newline = "\n";
public Main() {
super(new BorderLayout());
textArea.setEditable(false);
scrollPane.setVerticalScrollBarPolicy(JScrollPane.VERTICAL_SCROLLBAR_ALWAYS);
scrollPane.setPreferredSize(new Dimension(400, 250));
add(scrollPane, BorderLayout.CENTER);
textArea.append("This text area displays information " + "about its mouse wheel events."
+ newline);
textArea.addMouseWheelListener(this);
setPreferredSize(new Dimension(450, 350));
setBorder(BorderFactory.createEmptyBorder(20, 20, 20, 20));
}
public void mouseWheelMoved(MouseWheelEvent e) {
String message;
int notches = e.getWheelRotation();
if (notches < 0) {
message = "Mouse wheel moved UP " + -notches + " notch(es)" + newline;
} else {
message = "Mouse wheel moved DOWN " + notches + " notch(es)" + newline;
}
if (e.getScrollType() == MouseWheelEvent.WHEEL_UNIT_SCROLL) {
message += " Scroll type: WHEEL_UNIT_SCROLL" + newline;
message += " Scroll amount: " + e.getScrollAmount() + " unit increments per notch"
+ newline;
message += " Units to scroll: " + e.getUnitsToScroll() + " unit increments" + newline;
message += " Vertical unit increment: "
+ scrollPane.getVerticalScrollBar().getUnitIncrement(1) + " pixels" + newline;
} else { // scroll type == MouseWheelEvent.WHEEL_BLOCK_SCROLL
message += " Scroll type: WHEEL_BLOCK_SCROLL" + newline;
message += " Vertical block increment: "
+ scrollPane.getVerticalScrollBar().getBlockIncrement(1) + " pixels" + newline;
}
saySomething(message, e);
}
void saySomething(String eventDescription, MouseWheelEvent e) {
textArea.append(e.getComponent().getClass().getName() + ": " + eventDescription);
textArea.setCaretPosition(textArea.getDocument().getLength());
}
public static void main(String[] args) {
JFrame frame = new JFrame("MouseWheelEventDemo");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
JComponent newContentPane = new Main();
newContentPane.setOpaque(true);
frame.setContentPane(newContentPane);
frame.pack();
frame.setVisible(true);
}
}
</source>
JScrollBar.HORIZONTAL
<source lang="java">
import java.awt.BorderLayout; import javax.swing.JFrame; import javax.swing.JScrollBar; public class MainClass {
public static void main(String args[]) throws Exception {
JFrame frame = new JFrame();
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
JScrollBar oneJScrollBar = new JScrollBar(JScrollBar.HORIZONTAL);
frame.add(oneJScrollBar, BorderLayout.NORTH);
frame.setSize(200, 44);
frame.setVisible(true);
}
}
</source>
JScrollBar: setBlockIncrement(int blockIncrement)
<source lang="java">
import java.awt.BorderLayout; import java.awt.event.AdjustmentEvent; import java.awt.event.AdjustmentListener; import javax.swing.JFrame; import javax.swing.JLabel; import javax.swing.JPanel; import javax.swing.JScrollBar; public class MainClass extends JPanel {
JLabel label = new JLabel();
public MainClass() {
super(true);
setLayout(new BorderLayout());
JScrollBar hbar = new JScrollBar(JScrollBar.HORIZONTAL, 30, 20, 0, 300);
JScrollBar vbar = new JScrollBar(JScrollBar.VERTICAL, 30, 40, 0, 300);
hbar.setUnitIncrement(2);
hbar.setBlockIncrement(1);
hbar.addAdjustmentListener(new MyAdjustmentListener());
vbar.addAdjustmentListener(new MyAdjustmentListener());
add(hbar, BorderLayout.SOUTH);
add(vbar, BorderLayout.EAST);
add(label, BorderLayout.CENTER);
}
class MyAdjustmentListener implements AdjustmentListener {
public void adjustmentValueChanged(AdjustmentEvent e) {
label.setText(" New Value is " + e.getValue() + " ");
repaint();
}
}
public static void main(String s[]) {
JFrame frame = new JFrame("Scroll Bar Example");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setContentPane(new MainClass());
frame.setSize(200, 200);
frame.setVisible(true);
}
}
</source>
JScrollBar: setFocusable(boolean focusable)
<source lang="java">
import java.awt.Dimension; import java.awt.event.FocusEvent; import java.awt.event.FocusListener; import java.util.Vector; import javax.swing.BorderFactory; import javax.swing.JButton; import javax.swing.JComboBox; import javax.swing.JComponent; import javax.swing.JFrame; import javax.swing.JLabel; import javax.swing.JList; import javax.swing.JPanel; import javax.swing.JScrollPane; import javax.swing.JTextField; public class Main extends JPanel implements FocusListener {
public Main() {
JTextField textField = new JTextField("A TextField");
textField.addFocusListener(this);
JLabel label = new JLabel("A Label");
label.addFocusListener(this);
add(label);
String comboPrefix = "ComboBox Item #";
final int numItems = 15;
Vector vector = new Vector(numItems);
for (int i = 0; i < numItems; i++) {
vector.addElement(comboPrefix + i);
}
JComboBox comboBox = new JComboBox(vector);
comboBox.addFocusListener(this);
add(comboBox);
JButton button = new JButton("A Button");
button.addFocusListener(this);
add(button);
String listPrefix = "List Item #";
Vector listVector = new Vector(numItems);
for (int i = 0; i < numItems; i++) {
listVector.addElement(listPrefix + i);
}
JList list = new JList(listVector);
list.setSelectedIndex(1);
list.addFocusListener(this);
JScrollPane listScrollPane = new JScrollPane(list);
listScrollPane.getVerticalScrollBar().setFocusable(false);
listScrollPane.getHorizontalScrollBar().setFocusable(false);
add(listScrollPane);
setPreferredSize(new Dimension(450, 450));
setBorder(BorderFactory.createEmptyBorder(20, 20, 20, 20));
}
void displayMessage(String prefix, FocusEvent e) {
System.out.println(prefix
+ (e.isTemporary() ? " (temporary):" : ":")
+ e.getComponent().getClass().getName()
+ "; Opposite component: "
+ (e.getOppositeComponent() != null ? e.getOppositeComponent().getClass().getName()
: "null"));
}
public static void main(String[] args) {
JFrame frame = new JFrame("FocusEventDemo");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
JComponent newContentPane = new Main();
newContentPane.setOpaque(true); // content panes must be opaque
frame.setContentPane(newContentPane);
frame.pack();
frame.setVisible(true);
}
public void focusGained(FocusEvent e) {
displayMessage("Focus gained", e);
}
public void focusLost(FocusEvent e) {
displayMessage("Focus lost", e);
}
}
</source>
JScrollBar: setUnitIncrement(int unitIncrement)
<source lang="java">
import java.awt.BorderLayout; import java.awt.event.AdjustmentEvent; import java.awt.event.AdjustmentListener; import javax.swing.JFrame; import javax.swing.JLabel; import javax.swing.JPanel; import javax.swing.JScrollBar; public class MainClass extends JPanel {
JLabel label = new JLabel();
public MainClass() {
super(true);
setLayout(new BorderLayout());
JScrollBar hbar = new JScrollBar(JScrollBar.HORIZONTAL, 30, 20, 0, 300);
JScrollBar vbar = new JScrollBar(JScrollBar.VERTICAL, 30, 40, 0, 300);
hbar.setUnitIncrement(2);
hbar.setBlockIncrement(1);
hbar.addAdjustmentListener(new MyAdjustmentListener());
vbar.addAdjustmentListener(new MyAdjustmentListener());
add(hbar, BorderLayout.SOUTH);
add(vbar, BorderLayout.EAST);
add(label, BorderLayout.CENTER);
}
class MyAdjustmentListener implements AdjustmentListener {
public void adjustmentValueChanged(AdjustmentEvent e) {
label.setText(" New Value is " + e.getValue() + " ");
repaint();
}
}
public static void main(String s[]) {
JFrame frame = new JFrame("Scroll Bar Example");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setContentPane(new MainClass());
frame.setSize(200, 200);
frame.setVisible(true);
}
}
</source>
JScrollBar: setValue(int value)
<source lang="java">
import java.awt.BorderLayout; import java.awt.Color; import java.awt.Dimension; import java.awt.event.ActionEvent; import java.awt.event.ActionListener; import javax.swing.JButton; import javax.swing.JFrame; import javax.swing.JLabel; import javax.swing.JScrollBar; import javax.swing.JScrollPane; import javax.swing.border.LineBorder; public class MainClass {
public static void main(String args[]) throws Exception {
JFrame frame = new JFrame("Cornering Sample");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
JButton button = new JButton("+");
JLabel bigLabel = new JLabel("A");
bigLabel.setPreferredSize(new Dimension(400,400));
bigLabel.setBorder(new LineBorder(Color.red));
JScrollPane scrollPane = new JScrollPane(bigLabel);
scrollPane.setCorner(JScrollPane.UPPER_LEFT_CORNER, button);
scrollPane.setColumnHeaderView(new JLabel("B"));
scrollPane.setRowHeaderView(new JLabel("C"));
ActionListener actionListener = new JScrollPaneToTopAction(scrollPane);
button.addActionListener(actionListener);
frame.add(scrollPane, BorderLayout.CENTER);
frame.setSize(300, 200);
frame.setVisible(true);
}
}
class JScrollPaneToTopAction implements ActionListener {
JScrollPane scrollPane;
public JScrollPaneToTopAction(JScrollPane scrollPane) {
if (scrollPane == null) {
throw new IllegalArgumentException("JScrollPaneToTopAction: null JScrollPane");
}
this.scrollPane = scrollPane;
}
public void actionPerformed(ActionEvent actionEvent) {
JScrollBar verticalScrollBar = scrollPane.getVerticalScrollBar();
JScrollBar horizontalScrollBar = scrollPane.getHorizontalScrollBar();
verticalScrollBar.setValue(verticalScrollBar.getMinimum());
horizontalScrollBar.setValue(horizontalScrollBar.getMinimum());
}
}
</source>
new JScrollBar(int orientation)
<source lang="java">
import java.awt.BorderLayout; import javax.swing.JFrame; import javax.swing.JScrollBar; public class MainClass {
public static void main(String args[]) throws Exception {
JFrame frame = new JFrame();
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
JScrollBar oneJScrollBar = new JScrollBar(JScrollBar.HORIZONTAL);
frame.add(oneJScrollBar, BorderLayout.NORTH);
frame.setSize(200, 44);
frame.setVisible(true);
}
}
</source>
new JScrollBar(int orientation, int value, int extent, int min, int max)
<source lang="java">
import java.awt.BorderLayout; import java.awt.event.AdjustmentEvent; import java.awt.event.AdjustmentListener; import javax.swing.JFrame; import javax.swing.JLabel; import javax.swing.JPanel; import javax.swing.JScrollBar; public class MainClass extends JPanel {
JLabel label = new JLabel();
public MainClass() {
super(true);
setLayout(new BorderLayout());
JScrollBar hbar = new JScrollBar(JScrollBar.HORIZONTAL, 30, 20, 0, 300);
JScrollBar vbar = new JScrollBar(JScrollBar.VERTICAL, 30, 40, 0, 300);
hbar.setUnitIncrement(2);
hbar.setBlockIncrement(1);
hbar.addAdjustmentListener(new MyAdjustmentListener());
vbar.addAdjustmentListener(new MyAdjustmentListener());
add(hbar, BorderLayout.SOUTH);
add(vbar, BorderLayout.EAST);
add(label, BorderLayout.CENTER);
}
class MyAdjustmentListener implements AdjustmentListener {
public void adjustmentValueChanged(AdjustmentEvent e) {
label.setText(" New Value is " + e.getValue() + " ");
repaint();
}
}
public static void main(String s[]) {
JFrame frame = new JFrame("Scroll Bar Example");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setContentPane(new MainClass());
frame.setSize(200, 200);
frame.setVisible(true);
}
}
</source>
