当我点击myJtabel中的一行时,我想升级myComboBox的列表项。我做了我必须做的事情才能取得好成绩。但是当一个未归档的myComboBox我有一个真实作为最后一项,并且每次我完成升级都会添加一个true作为项目
我班上没有的内容
myUpgradeCombo:
class myUpgradeCombo {
public static <E> void upgrade_(JComboBox<E> combo, int index)
{
E item = combo.getItemAt(index);
combo.removeItemAt(index);
combo.insertItemAt(item, 0);
combo.setSelectedIndex(0);
}
public static <E> boolean upgrade(JComboBox<E> combo, E item)
{
for (int index=0; index<combo.getItemCount(); index++)
{
if (combo.getItemAt(index).toString().equals(item.toString()))
{
upgrade_(combo,index);
return true;
}
}
return false ;
}
}
按下myJtable鼠标时:
int rec = myJtableF.getSelectedRow();
String idf = myJtableF.getValueAt(rec, 1).toString();
String format = myJtableF.getValueAt(rec, 2).toString();
String platef = myJtableF.getValueAt(rec, 3).toString();
this.myCombo.addItem(myUpgradeCombo.upgrade(myCombo, new FC(format,platef,idf)));
结果在myCombo中:
...... MySelectedItem
.......Firstitem
.......SecondItem
.......ThirdItem
.......fourthItem
.......true
.......true
谢谢,
答案 0 :(得分:0)
因为myUpgradeCombo.upgrade(myCombo,new FC(format,platef,idf))的返回值传递给this.myCombo.addItem()。
所以从upgrade()返回的true作为项添加到你的组合框中,在这一行:
this.myCombo.addItem(myUpgradeCombo.upgrade(myCombo, new FC(format,platef,idf)));