如何获取最后一个或上一个或未选择的项目,然后获取新项目JComboBox
?
我假设这适用于允许您向其添加项目侦听器的所有对象。
String[] items = {"item 1","item 2"," item 3","item 4"};
JComboBox combo = new JComboBox(items)
combo.addItemListener(new ItemListener(){
public void itemStateChanged(ItemEvent ie)
{
if(ie.getStateChange() == ItemEvent.DESELECTED) //edit: bracket was missing
{
System.out.println("Previous item: " + ie.getItem()); //edit: bracket was missing
}
else if(ie.getStateChange() == ItemEvent.SELECTED)
{
System.out.println("Current \ New item: " + ie.getItem());
}
}
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