不知道您的两个答案中的哪个将被删除，但是这里又是相同的答案。请注意，您可以使用循环创建所有JCombo@R_272_2419@es和选项，以防止真正冗长的重复代码。然后，您可以使用getSource（）方法来判断事件来自哪个组合框。如果将JCombo@R_272_2419@es创建为数组，则可以非常清晰地循环遍历它们。为了重新添加内容，我只需要跟踪已选择的内容以及使用String数组的组合框。然后，您可以检查此数组，并根据需要使用它来添加项目。请注意，它们不会以相同的顺序返回。如果您想要该功能，则可以使用insertItemAt，但这可能会有些混乱（因为自从添加和删除项以来索引一直在变化），因此我将其省略。
//Declare and initialize the options that the combo@R_272_2419@es will have
String[] options = {"-Select-", "Item 1", "Item 2", "Item 3", "Item 4"};
//Declare and initialize an array that will hold the currently selected options in each combo@R_272_2419@ by index
//For example the currently selected value of combo@R_272_2419@es[1] is selected[1]
String[] selected = {"-Select-", "-Select-", "-Select-", "-Select-"};
//Declare and initialize an array of combo@R_272_2419@es.
//Four combo@R_272_2419@es will be created all containing the options array
JCombo@R_272_2419@[] combo@R_272_2419@es = new JCombo@R_272_2419@[4];
for(int i = 0; i < combo@R_272_2419@.length; i++) {
combo@R_272_2419@es[i] = new JCombo@R_272_2419@(options);
}
private void jCombo@R_272_2419@1ItemStateChanged(java.awt.event.ItemEvent evt) {
//Loop through all of the combo@R_272_2419@es in combo@R_272_2419@es
for(int i = 0; i < combo@R_272_2419@es.length; i++) {
//Check to see if the current combo@R_272_2419@ in the array matches the source of your event
if(evt.getSource() == combo@R_272_2419@es[i]) {
//Get the string value of the combo@R_272_2419@ that fired the event
String currentSelection = (String)combo@R_272_2419@es[i].getSelectedItem();
//Make sure that the value actually changed
if(!currentSelection.equals(selected[i]) {
//If the prevIoUs value of the combo@R_272_2419@ was "-Select-" don't add it to all the other combo@R_272_2419@es
if(!selected[i].equals(options[0])) {
//Add back the prevIoUs value to all combo@R_272_2419@es other than the one that fired the event
for(int j = 0; j < combo@R_272_2419@es.length; j++) {
if(j != i) {
combo@R_272_2419@es[j].addItem(selected[i]);
}
}
}
//If current value of the combo@R_272_2419@ is "-Select-" don't remove it from all other combo@R_272_2419@es
if(!currentSelection.equals(options[0]) {
//Remove the current value from all combo@R_272_2419@es other than the one that fired the event
for(int j = 0; j < combo@R_272_2419@es.length; j++) {
if(j != i) {
combo@R_272_2419@es[j].removeItem(combo@R_272_2419@es[i].getSelectedItem());
}
}
}
}
//Set the selected item for the combo@R_272_2419@ that fired the event to the current value
selected[i] = currentSelection;
}
}
}
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