Confused about JTabbedPane class

**Sonam Goenka** · 13-02-2010

Hello Guys,

I am beginner in the field of java programming language. The concept of 'java classes' seems very difficult as compare to C++ programming. I am getting troubled while understanding the JTabbedPane class of java. I want to know the use of JTabbedPane class as well as it's methods. If you have sound knowledge about the 'JTabbedPane class', then please let me know that. I am waiting for your reply.

**kelfro** · 13-02-2010

A JTabbedPane class component that lets the user switch between a group of components by clicking on a tab with a given title and/or icon. Tabs/components are added to a TabbedPane object by using the addTab and insertTab methods. A tab is represented by an index corresponding to the position it was added in, where the first tab has an index equal to 0 and the last tab has an index equal to the tab count minus 1. The TabbedPane uses a SingleSelectionModel to represent the set of tab indices and the currently selected index.

**Zecho** · 13-02-2010

Please refer following example of java , which will depict you the use of JTabbedPane class:

Code:

import javax.swing.JTabbedPane;

public class JTabbedPaneDemo {

  static void add(JTabbedPane TBP, String lb, int mnemonic) {
    int count = TBP.getTabCount();
    JButton button = new JButton(lb);
    TBP.addTab(lb, new ImageIcon("yourFile.gif"), button, lb);
    TBP.setMnemonicAt(count, mnemonic);
  }

  public static void main(String args[]) {
    JFrame fmj = new JFrame("Tabbed Pane Sample");
    fmj.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

    JTabbedPane TBP = new JTabbedPane();
    TBP.setTabLayoutPolicy(JTabbedPane.SCROLL_TAB_LAYOUT);
    String titles[] = { "General", "Security", "Content", "Connection", "Programs", "Advanced" };
    int mnemonic[] = { KeyEvent.VK_G, KeyEvent.VK_S, KeyEvent.VK_C, KeyEvent.VK_O, KeyEvent.VK_P,
        KeyEvent.VK_A };
    for (int i = 0, n = titles.length; i < n; i++) {
      add(TBP, titles[i], mnemonic[i]);
    }

    TBP.removeAll();
    fmj.add(TBP, BorderLayout.CENTER);
    fmj.setSize(500, 150);
    fmj.setVisible(true);
  }
}

**opaper** · 13-02-2010

Hi friend,

I suggest you to review following few methods of JTabbedPane class:

setToolTipTextAt(int indexVal, String TexttoolTip)
setTabLayoutPolicy(int tabLayout)
setIconAt(int index, Icon icn)
setDisplayedMnemonicIndexAt(int IndexodTab, int cIndex)
setComponentAt(int indexval, Component cmp)
removeTabAt(int indexVal)

**MindSpace** · 13-02-2010

Hi,

Following java program is very good example of JTabbedPane class. In this program I have used 'getIconAt()' method of the JTabbedPane class.

Code:

import javax.swing.JTabbedPane;
import java.awt.Component;
import javax.swing.Icon;

public class JTPane {
  public static void main(String[] argv) throws Exception {
    JTabbedPane pane1 = new JTabbedPane();
    int count = pane1.getTabCount();
    for (int il = 0; il < count; il++) {
      String label = pane1.getTitleAt(il);
      Icon icon = pane1.getIconAt(il);
      String tooltip = pane1.getToolTipTextAt(il);
      boolean enabled = pane1.isEnabledAt(il);
      int keycode = pane1.getMnemonicAt(il);
      Component comp = pane1.getComponentAt(il);
    }
  }
}

**Modifier** · 13-02-2010

Constructors of JTabbedPane class:

JTabbedPane(int tabPlacementVal, int tabLayoutPolicyVal): This constructor of JTabbedPane class is essential for the creation of an TabbedPane which is empty.
JTabbedPane(int tabPlacementVal): This constructor of JTabbedPane class is essential for the creation of TabbedPane along with the specified tab placement.
JTabbedPane(): This constructor of JTabbedPane class is essential for creation of TabbedPane along with a default tab placement.