我有这个错误,在填充 JList 后,我尝试检索所选项目的值。但是当我这样做时,它被调用了两次。
这是我的代码:
public CaveAdventureUI(CaveGame game) {
initComponents();
playerCarryItemModel = new DefaultListModel();
caveCarryItemModel = new DefaultListModel();
this.caveGame = game;
this.world = game.getCaveWorld();
listSelectionModel = this.jListCaveCarryItems.getSelectionModel();
listSelectionModel.setSelectionMode(ListSelectionModel.SINGLE_SELECTION);
this.listSelectionModel.addListSelectionListener( new SharedListSelectionHandler());
//for debug purpose,see the world grid in console
game.drawCaves();
//new JComboBox(Mood.values());
createGridQuarePanels();
//world.startGame(GameLevel.Beginner);
update();
}
private class SharedListSelectionHandler implements ListSelectionListener {
public void valueChanged(ListSelectionEvent listSelectionEvent) {
ListSelectionModel lsm = (ListSelectionModel)listSelectionEvent.getSource();
if (!lsm.isSelectionEmpty()) {
Occupant opt = mapOccupants.get(Integer.toString(jListCaveCarryItems.getSelectedIndex()));
System.out.println("selected index :" +jListCaveCarryItems.getSelectedIndex() +"[["+opt.getName()+"]]");
}
}
}
在上面的代码中,当我在 jList 上进行选择时:jListCaveCarryItems,它会触发 SharedListSelectionHandler 类。但是,当我单击 JList 时,它会打印出两次选定的值。
谁能帮我弄清楚?
感谢和问候,