我想通过for循环将toStrings
Arraylist
中的Objects
项添加到Jlist
。我试过这个。
for (int i = 0; i < customer.slist.size(); i++) {
((DefaultListModel) checkOutList.getModel()).addElement(customer.slist.toString());//slist is an array of objects.
}
但它没有用。此外,当我尝试
时,NetBeans告诉我.addElement()
不是JList
的方法
checkOutList.addElement("anything")
答案 0 :(得分:1)
而不是
customer.slist.toString()
尝试:
customer.slist.get(ⅰ)的ToString();
代码。
答案 1 :(得分:0)
我有这个实现:
这是自定义JList:
@SuppressWarnings("serial")
public class JListCustomered<T extends JListPresentedInterface> extends JList<T>{
private List<T> list;
private List<T> selectedList;
public JListCustomered(List<T> list){
super();
this.list=list;
setCellRenderer(new JListRenderer());
setModel(new ListModel());
}
public void loadData(List<T> list){
getSelectedList().clear();
this.list=list;
setModel(new ListModel());
}
/** {@link JListCustomered#list} */
public List<T> getList() {
if(list==null)
list=new ArrayList<T>();
return list;
}
/** {@link JListCustomered#selectedList} */
public List<T> getSelectedList() {
if(selectedList==null)
selectedList=new ArrayList<T>();
return selectedList;
}
public class JListRenderer extends JLabel implements ListCellRenderer<T>{
JSeparator separator;
private JListRenderer(){
separator=new JSeparator(JSeparator.HORIZONTAL);
setOpaque(true);
}
/** @see javax.swing.ListCellRenderer#getListCellRendererComponent(javax.swing.JList, java.lang.Object, int, boolean, boolean) */
public Component getListCellRendererComponent(JList<? extends T> list, T value, int index, boolean isSelected, boolean cellHasFocus) {
if(value.isSeparator()){
return separator;
}
List<T> selected = getSelectedList();
if (isSelected) {
if (!selected.contains(value)) {
getSelectedList().add(value);
}
this.setBackground(getSelectionBackground());
} else {
if (selected.contains(value)) {
getSelectedList().remove(value);
}
setBackground(Color.WHITE);
}
setFont(list.getFont());
setText(value.getJListName());
return this;
}
}
private class ListModel implements javax.swing.ListModel<T>{
/** @see javax.swing.ListModel#getSize() */
public int getSize() {
return getList().size();
}
/** @see javax.swing.ListModel#getElementAt(int) */
public T getElementAt(int index) {
return getList().get(index);
}
/** @see javax.swing.ListModel#addListDataListener(javax.swing.event.ListDataListener) */
public void addListDataListener(ListDataListener l) {
}
/** @see javax.swing.ListModel#removeListDataListener(javax.swing.event.ListDataListener) */
public void removeListDataListener(ListDataListener l) {
}
}
}
在对象的接口下面,您想要添加到JList:
public interface JListPresentedInterface {
public String getJListName();
public boolean isSeparator();
}
您可以使用方法loadData
在JList上显示数据,获取选定列表getList