CODEWITHSUNDEEP
javaswingnetbeansjcomboboxitemlistener
Alpan67
Alpan67

Reputation: 105

JAVA netbeans problems with comboBox

i am trying to load 2 combo Boxes; the secoond combo box has to be loaded after the change in the first combo. I am using netbeans and i tried several times but it does not work ... the items to be loaded have to be the same with the exceptio of the item chosen in the first combo.

    private void firstTeamComboBoxItemStateChanged(java.awt.event.ItemEvent evt)
{                                                   
        loadSecondTeamComboBox();
    }                                                  

    private void loadSecondTeamComboBox()
    {
        String[] theTeamsInTheLeague2 = league.loadTeamsInLeague(secondTeam.getLeague());
        secondTeamComboBox.addItem("Select a Team");
        for(int i = 0; i < theTeamsInTheLeague2.length; i++)
            if (!(theTeamsInLeague2[i].equals(firstTeam.getLeague()))
                secondTeamComboBox.addItem(theTeamsInTheLeague2[i]);
    }


    private void loadFirstTeamComboBox()
    {
        String[] theTeamsInTheLeague1 = league.loadTeamsInLeague(firstTeam.getLeague());
        firstTeamComboBox.addItem("Select a Team");
        for(int i = 0; i < theTeamsInTheLeague1.length; i++)
            firstTeamComboBox.addItem(theTeamsInTheLeague1[i]);
    }

Upvotes: 0

Views: 1215

Answers (1)

trashgod
trashgod

Reputation: 205805

One approach would be to override setSelectedItem() in DefaultComboBoxModel and keep a reference to otherTeamModel, updating it as needed from allTeamsInTheLeague.

class MyComboBoxModel extends DefaultComboBoxModel {
    private DefaultComboBoxModel otherTeamModel;

    public MyComboBoxModel(DefaultComboBoxModel otherTeamModel) {
        this.otherTeamModel = otherTeamModel;
    }
    @Override
    public void setSelectedItem(Object item) {
        super.setSelectedItem(item);
        otherTeamModel.removeAllElements();
        // add all allTeamsInTheLeague except item
    }
}

Upvotes: 1

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