Java Swing | JToolBar
JToolBar is a part of Java Swing package. JToolBar is an implementation of tool bar .The JToolBar is a group of commonly used components such as buttons or drop down menu.
JToolBar can be dragged to different locations by the user
Constructors of the class are:
- JToolBar() : creates a new toolbar with horizontal orientation
- JToolBar(int o) : creates a new toolbar with specified orientation
- JToolBar(String n) : creates a new toolbar with specified name
- JToolBar(String n, int o) : creates a new toolbar with specified name and orientation.
Commonly used methords :
- addSeparator() : adds the separator to the end of toolbar
- setFloatable(boolean b) : if true is passed then the toolbar can be dragged to other locations orlese not .
- setLayout(LayoutManager m) : set layout of the toolbar
- setOrientation(int o) : sets the orientation of toolbar
- add(Component c) : adds component to the toolbar
- getMargin() : returns the margin of the toolbar
- setMargin(Insets m) : sets the margin of the toolbar to the insets given
- getOrientation() : returns the orientation of the toolbar
- updateUI() : Notification from the UIFactory that the Look and feel has changed.
- setUI(ToolBarUI u) : Sets the Look and feel object that renders this component.
- setRollover(boolean b) : Sets the rollover state of this toolbarto boolean b.
- setFloatable(boolean b) :the boolean b decides whether the position of toolbar can be changed or not
- setBorderPainted(boolean b): decides whether border should be painted or not.
- paintBorder(Graphics g) : paint the toolbar’s border
- isRollover() : Returns the rollover state.
- isFloatable() : returns the floatable property.
- isBorderPainted() : returns whether border is painted or not
- getComponentIndex(Component c) : Returns the index of the specified component./li>
- getComponentAtIndex(int i) :Returns the component at the specified index.
- addSeparator(Dimension size) :Appends a separator of a specified dimension.
- addSeparator() :Appends a separator of default size.
- add(Action a) : adds a new JButton that follows the specified action.
- paramString() : returns a string representation of this JToolBar.
- getUIClassID() : returns the name of the Look and feel class that renders this component.
- getAccessibleContext() : gets the AccessibleContext associated with this JToolBar.
The Following programs will illustrate the use of toolbar.
1. Program to create a simple toolbar and add buttons and combobox to it.
// Java Program to create a simple toolbar and add buttons and combobox to it. import java.awt.*; import javax.swing.*; import java.awt.event.*; public class Tool extends JFrame { // toolbar static JToolBar tb; // buttons static JButton b1, b2; // create a frame static JFrame f; // create a combo box static JComboBox x; public static void main() { // create a frame f = new JFrame("Toolbar demo"); // set layout for frame f.setLayout(new BorderLayout()); // create a toolbar tb = new JToolBar(); // create a panel JPanel p = new JPanel(); // create a combobox x = new JComboBox(new String[] { "item 1", "item 2", "item 3" }); // create new buttons b1 = new JButton("button 1"); b2 = new JButton("button 2"); // add buttons p.add(b1); p.add(b2); // add menu to menu bar p.add(x); tb.add(p); // add toolbar to frame f.add(tb, BorderLayout.NORTH); // set the size of the frame f.setSize(500, 500); f.setVisible(true); } } |
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2. Program to create a toolbar and add action listener to its components .
// Java Program to create a toolbar and add action listener to its components . import java.awt.*; import javax.swing.*; import java.awt.event.*; public class Tool extends JFrame implements ActionListener, ItemListener { // toolbar static JToolBar tb; // buttons static JButton b1, b2; // create a frame static JFrame f; // create a combo box static JComboBox x; // create a label static JLabel l, l1; public static void main() { // create a object of class Tool to = new Tool(); // create a label l = new JLabel("nothing selected"); l1 = new JLabel("nothing selected"); // create a frame f = new JFrame("Toolbar demo"); // set layout for frame f.setLayout(new BorderLayout()); // create a toolbar tb = new JToolBar(); // create a panel JPanel p = new JPanel(); // create a combobox x = new JComboBox(new String[] { "item 1", "item 2", "item 3" }); // add actionListener x.addItemListener(to); // create new buttons b1 = new JButton("button 1"); b2 = new JButton("button 2"); // add ActionListener to it b1.addActionListener(to); b2.addActionListener(to); // add buttons p.add(b1); p.add(b2); // add menu to menu bar p.add(x); tb.add(p); // create a panel JPanel p1 = new JPanel(); p1.add(l); p1.add(l1); // add toolbar to frame f.add(tb, BorderLayout.NORTH); f.add(p1, BorderLayout.CENTER); // set the size of the frame f.setSize(500, 500); f.setVisible(true); } // if button is pressed public void actionPerformed(ActionEvent e) { l.setText(e.getActionCommand() + " selected."); } // if combo box is selected public void itemStateChanged(ItemEvent e) { l1.setText(x.getSelectedItem() + " selected."); } } |
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3. Program to create a vertical toolbar and add action listener to its components .
import java.awt.*; import javax.swing.*; import java.awt.event.*; public class Tool extends JFrame implements ActionListener, ItemListener { // toolbar static JToolBar tb; // buttons static JButton b1, b2; // create a frame static JFrame f; // create a combo box static JComboBox x; // create a label static JLabel l, l1; public static void main() { // create a object of class Tool to = new Tool(); // create a label l = new JLabel("nothing selected"); l1 = new JLabel("nothing selected"); // create a frame f = new JFrame("Toolbar demo"); // set layout for frame f.setLayout(new BorderLayout()); // create a toolbar tb = new JToolBar("toolbar"); // set orientation tb.setOrientation(SwingConstants.VERTICAL); // create a panel JPanel p = new JPanel(); // set layout p.setLayout(new BoxLayout(p, BoxLayout.Y_AXIS)); // create a combobox x = new JComboBox(new String[] { "item 1", "item 2", "item 3" }); // add actionListener x.addItemListener(to); // create new buttons b1 = new JButton("button 1"); b2 = new JButton("button 2"); // add ActionListener to it b1.addActionListener(to); b2.addActionListener(to); // add buttons p.add(b1); p.add(b2); // add menu to menu bar p.add(x); tb.add(p); // create a panel JPanel p1 = new JPanel(); p1.add(l); p1.add(l1); // add toolbar to frame f.add(tb, BorderLayout.WEST); f.add(p1, BorderLayout.CENTER); // set the size of the frame f.setSize(500, 500); f.setVisible(true); } // if button is pressed public void actionPerformed(ActionEvent e) { l.setText(e.getActionCommand() + " selected."); } // if combo box is selected public void itemStateChanged(ItemEvent e) { l1.setText(x.getSelectedItem() + " selected."); } } |
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Note : The following programs might not run in an online compiler please use an Offline IDE
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