我想从JList中有多个选择(“列”)。一旦按下(“导出”)按钮,如何获取JList中所有选定项的String值并将它们放入Strings的array / ArrayList中?
我在构造函数中有这个:
public ColumnList(String[] allColumns) {
super(new BorderLayout());
listModel = createListModel(allColumns); // contains all the columns
list = new JList<String>(listModel);
list.setSelectionMode(ListSelectionModel.MULTIPLE_INTERVAL_SELECTION);
list.setSelectedIndex(0);
list.setVisibleRowCount(5);
JScrollPane listScrollPane = new JScrollPane(list);
exportButton = createExportButton(exportString);
}
并且在同一类中是该内部类:
class ExportListener implements ActionListener {
@Override
public void actionPerformed(ActionEvent e) {
String columnName = (String) list.getSelectedValue();
selectedCols.add(columnName); // add to array list
}
}
现在我知道这行不通。这仅适用于一个选定的值。如何为多项选择做呢?
class ExportListener implements ActionListener {
@Override
public void actionPerformed(ActionEvent e) {
String[] columnsSelected;
columnsSelected = new String[list.getSelectedValuesList().size()];
columnsSelected = (list.getSelectedValuesList()).toArray(columnsSelected);
}
}
在调用JList.setSelectionMode(ListSelectionModel.MULTIPLE_INTERVAL_SELECTION)后使用JList.setSelectedIndices(int [])