Swing Tabs

Assuntos Gerais
#1

O codigo nao fumfa erro abaixo
ja tentei um monte


import java.awt.*;
import java.awt.event.*;
import javax.swing.*;


public class SwingTabs extends JFrame implements ActionListener
{
   private JTabbedPane tabs;
   private JButton bAnt, bProx;
   private JPanel panel;
   public SwingTabs()
     {
        super("Swing Tabs");
        tabs = new JTabbedPane();
        // Aba 1
        ta.setLineWrap(true); ta.setWrapStyleWord(true);
        tabs.addTab("Aba 1", new JScrollPane(ta), "Primeira Aba");
        // Aba 2
        JPanel panel = new JPanel();
        panel.setBackground(Color.white);
        tabs.addTab("Aba 2", panel);
        // Aba 3
        JPanel panel = new JPanel();
        panel.setBackground(Color.blue);
        tabs.addTab("Aba 3", panel);
        // Aba 4
        tabs.addTab("Aba 4", new JPanel());
        getContentPane().add(tabs, "Center");
        // Painel de controle
        JPanel p1 = new JPanel(), p2 = new JPanel(new GridLayout(1,2,5,5));
        p2.add(bAnt = new JButton("Anterior"));
        p2.add(bProx = new JButton("Poximo"));
        p1.add(p2);
        getContentPane().add(p1, "South");
        bAnt.addActionListener(this);
        bProx.addActionListener(this);
        setSize(400,180);
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
     }
   public void actionPerformed(ActionEvent e)
     {
        int i = tabs.getSelectedIndex();
        if (e.getSource()==bAnt)
          tabs.setSelectedIndex(i>0?i-1:tabs.getTabCount()-1);
        else
          tabs.setSelectedIndex(i>tabs.getTabCount()-1?i+1:0);
     }
   public static void main(String s[])
     {
        new SwingTabs().show();
     }
}

Segue erro abaixo:

[wiliam@wiliam ij]$ javac SwingTabs.java
SwingTabs.java:17: cannot resolve symbol
symbol  : variable ta
location: class SwingTabs
        ta.setLineWrap(true); ta.setWrapStyleWord(true);
        ^
SwingTabs.java:17: cannot resolve symbol
symbol  : variable ta
location: class SwingTabs
        ta.setLineWrap(true); ta.setWrapStyleWord(true);
                              ^
SwingTabs.java:18: cannot resolve symbol
symbol  : variable ta
location: class SwingTabs
        tabs.addTab("Aba 1", new JScrollPane(ta), "Primeira Aba");
                                             ^
SwingTabs.java:18: cannot resolve symbol
symbol  : method addTab (java.lang.String,javax.swing.JScrollPane,java.lang.String)
location: class javax.swing.JTabbedPane
        tabs.addTab("Aba 1", new JScrollPane(ta), "Primeira Aba");
            ^
SwingTabs.java:24: panel is already defined in SwingTabs()
        JPanel panel = new JPanel();
               ^
5 errors
[wiliam@wiliam ij]$

[quote]
Sou livre uso linux!!
nao uso mais as teclas CTRL + ALT + DEL[/quote]

#2

Onde você declarou o atributo/variável “ta”??? Veja que o compilador não consegue encontrar a variável/atributo…Ha…tente perder um pouco mais de tempo na construção/elaboração de suas classes e não faça tentativa e erro…

#3