AWT-EventQueue의-0 "java.lang.ArrayIndexOutOfBoundsException : -1

Question

Possible Duplicate:
Exception Handling “AWT-EventQueue-0” java.lang.ArrayIndexOutOfBoundsException: -1

나는 다음과 같은 오류 데 :

 
Exception in thread "AWT-EventQueue-0" java.lang.ArrayIndexOutOfBoundsException: -1 
    at java.util.Vector.elementData(Vector.java:730) 
    at java.util.Vector.elementAt(Vector.java:473) 
    at javax.swing.DefaultListModel.elementAt(DefaultListModel.java:266) 
    at bfpl.BFPL$1$2$17.actionPerformed(BFPL.java:1163) 
    at javax.swing.AbstractButton.fireActionPerformed(AbstractButton.java:2018) 
    at javax.swing.AbstractButton$Handler.actionPerformed(AbstractButton.java:2341) 
    at javax.swing.DefaultButtonModel.fireActionPerformed(DefaultButtonModel.java:402) 

내 코드는 다음과 같습니다

final JFrame f10=new JFrame("Match Result"); 
    f10.setVisible(true); 
    f3.setVisible(false); 
    f10.setSize(1000,1000); 
    f10.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); 
    final JPanel p10=new JPanel(new GridBagLayout()); 
    GridBagConstraints g10=new GridBagConstraints(); 
    g10.insets=new Insets(2,2,2,2); 
    JLabel l53=new JLabel("Match No"); 
    JLabel l54=new JLabel("Team Win"); 
    JLabel l55=new JLabel("Team Lost"); 
    DefaultListModel dl6=new DefaultListModel(); 
    DefaultListModel dl7=new DefaultListModel(); 
    DefaultListModel dl8=new DefaultListModel(); 
    String f="SELECT Match_No,Team1,Team2 from Schedule"; 
    try{ 

     Connection con=DriverManager.getConnection("jdbc:mysql://127.0.0.1/BFPL","root","ilovepepsi"); 
     Statement s=con.createStatement(); 
     ResultSet rs=s.executeQuery(f); 
     while(rs.next()){ 
      String z=rs.getString("Match_No"); 
      String z1=rs.getString("Team1"); 
      String z2=rs.getString("Team2"); 
      dl6.addElement(z); 
      dl7.addElement(z1); 
      dl8.addElement(z2); 
     } 
    } 
    catch(SQLException ae){ 
     System.out.println("SQLException:"+ae.getMessage()); 
     System.out.println("SQLState:"+ae.getSQLState()); 
     System.out.println("VendorError:"+ae.getErrorCode()); 
     JOptionPane.showMessageDialog(p10,"Error in submitting data!"); 
    } 
    JList li6=new JList(dl6); 
    JList li7=new JList(dl7); 
    JList li8=new JList(dl8); 
    li6.setSelectionMode(ListSelectionModel.SINGLE_INTERVAL_SELECTION); 
    li6.setVisibleRowCount(2); 
    li7.setSelectionMode(ListSelectionModel.SINGLE_INTERVAL_SELECTION); 
    li7.setVisibleRowCount(2); 
    li8.setSelectionMode(ListSelectionModel.SINGLE_INTERVAL_SELECTION); 
    li8.setVisibleRowCount(2); 
    JButton b25=new JButton("Back"); 
    JButton b26=new JButton("Save"); 
    f10.add(p10); 
    g10.gridx=0; 
    g10.gridy=0; 
    p10.add(l53,g10); 
    g10.gridx=1; 
    g10.gridy=0; 
    p10.add(new JScrollPane(li6),g10); 
    g10.gridx=0; 
    g10.gridy=1; 
    p10.add(l54,g10); 
    g10.gridx=1; 
    g10.gridy=1; 
    p10.add(new JScrollPane(li7),g10); 
    g10.gridx=0; 
    g10.gridy=2; 
    p10.add(l55,g10); 
    g10.gridx=1; 
    g10.gridy=2; 
    p10.add(new JScrollPane(li8),g10); 
    g10.gridx=0; 
    g10.gridy=3; 
    p10.add(b25,g10); 
    g10.gridx=1; 
    g10.gridy=3; 
    p10.add(b26,g10); 
    int a9=li6.getSelectedIndex(); 
    int a10=li7.getSelectedIndex(); 
    int a11=li8.getSelectedIndex(); 
    final String z=(String) dl6.elementAt(a9); 
    final String z1=(String) dl7.elementAt(a10); 
    final String z2=(String)dl8.elementAt(a11); 

Answer 1

당신은 elementAt()에 getSelectedIndex()의 결과를 전달합니다. 목록 상자에서 아무 것도 선택되지 않으면 해당 값이 범위를 벗어납니다.