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JAVA -> Combo Boxes

Posted on 2007-04-11
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Last Modified: 2010-03-31
Hello,

I have 2 combo boxes and want one do something when a component is chosen on the other one.

ComboBox A -> Tables from a database

ComboBox B -> Columns from Table in ComboBox A

I can get the tables in CombBox A.... and the columns from a table....

I need the structure of how to start this and where do I put the code..... Think it will be something like :

ComboTable.addActionListener....................
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Question by:RicardoVGomes
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4 Comments
 

Author Comment

by:RicardoVGomes
ID: 18892032
This is the code I'm using... but when I choose a table in the comboBox on my application... nothing happens...

ComboTable.addActionListener(new selectionListener(){
                  public void valueChanged(ActionEvent event) throws SQLException {
                        
                  String table = (String) ComboTable.getSelectedItem();
                  
                  
                  String query = "SELECT * FROM " + table;

                  theStatement = Data_Extraction.con.createStatement();
                  rs = theStatement.executeQuery(query);
                  ResultSetMetaData rsmd = rs.getMetaData();
                  
              int numColumns = rsmd.getColumnCount();
                  
              for (int i=1; i<numColumns+1; i++) {
                  String columnName = rsmd.getColumnName(i);         
                  ComboColumn.addItem(columnName);
              }                   
                  
            }
            });
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Accepted Solution

by:
CEHJ earned 500 total points
ID: 18893101
You're mixing your listeners. Should be

ComboTable.addActionListener(new ActionListener() {
    public void actionPerformed(ActionEvent e) {
        //  Code in here
    }
});
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Author Comment

by:RicardoVGomes
ID: 18893190
Thanks ;)
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LVL 86

Expert Comment

by:CEHJ
ID: 18893197
:-)
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