JList中 類是一個組件,它顯示的對象的列表,并允許用戶選擇一個或多個項目。一個單獨的模型ListModel維護的內(nèi)容列表。
以下是javax.swing.JList類的聲明:
public class JList extends JComponent implements Scrollable, Accessible
以下是javax.swing.JList類的字段域:
static int HORIZONTAL_WRAP -- 表示“報紙樣式”單元格流水平然后垂直布局。
static int VERTICAL -- 表示垂直布局的單元格,在一個單一的列的默認(rèn)布局。
static int VERTICAL_WRAP -- 表示“newspaper ” 的布局,垂直流動的單元格然后水平。
S.N. | 構(gòu)造函數(shù) & 描述 |
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1 |
JList() Constructs a JList with an empty, read-only, model. |
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JList(ListModel dataModel) Constructs a JList that displays elements from the specified, non-null, model. |
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JList(Object[] listData) Constructs a JList that displays the elements in the specified array. |
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JList(Vector<?> listData) Constructs a JList that displays the elements in the specified Vector. |
S.N. | 方法 & 描述 |
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1 |
void addListSelectionListener(ListSelectionListener listener) Adds a listener to the list, to be notified each time a change to the selection occurs; the preferred way of listening for selection state changes. |
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void addSelectionInterval(int anchor, int lead) Sets the selection to be the union of the specified interval with current selection. |
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void clearSelection() Clears the selection; after calling this method, isSelectionEmpty will return true. |
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protected ListSelectionModel createSelectionModel() Returns an instance of DefaultListSelectionModel; called during construction to initialize the list's selection model property. |
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void ensureIndexIsVisible(int index) Scrolls the list within an enclosing viewport to make the specified cell completely visible. |
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protected void fireSelectionValueChanged(int firstIndex, int lastIndex, boolean isAdjusting) Notifies ListSelectionListeners added directly to the list of selection changes made to the selection model. |
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AccessibleContext getAccessibleContext() Gets the AccessibleContext associated with this JList. |
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int getAnchorSelectionIndex() Returns the anchor selection index. |
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Rectangle getCellBounds(int index0, int index1) Returns the bounding rectangle, in the list's coordinate system, for the range of cells specified by the two indices. |
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ListCellRenderer getCellRenderer() Returns the object responsible for painting list items. |
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boolean getDragEnabled() Returns whether or not automatic drag handling is enabled. |
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JList.DropLocation getDropLocation() Returns the location that this component should visually indicate as the drop location during a DnD operation over the component, or null if no location is to currently be shown. |
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DropMode getDropMode() Returns the drop mode for this component. |
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int getFirstVisibleIndex() Returns the smallest list index that is currently visible. |
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int getFixedCellHeight() Returns the value of the fixedCellHeight property. |
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int getFixedCellWidth() Returns the value of the fixedCellWidth property. |
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int getLastVisibleIndex() Returns the largest list index that is currently visible. |
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int getLayoutOrientation() Returns the layout orientation property for the list: VERTICAL if the layout is a single column of cells, VERTICAL_WRAP if the layout is "newspaper style" with the content flowing vertically then horizontally, or HORIZONTAL_WRAP if the layout is "newspaper style" with the content flowing horizontally then vertically. |
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int getLeadSelectionIndex() Returns the lead selection index. |
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ListSelectionListener[] getListSelectionListeners() Returns an array of all the ListSelectionListeners added to this JList by way of addListSelectionListener. |
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int getMaxSelectionIndex() Returns the largest selected cell index, or -1 if the selection is empty. |
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int getMinSelectionIndex() Returns the smallest selected cell index, or -1 if the selection is empty. |
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ListModel getModel() Returns the data model that holds the list of items displayed by the JList component. |
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int getNextMatch(String prefix, int startIndex, Position.Bias bias) Returns the next list element whose toString value starts with the given prefix. |
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Dimension getPreferredScrollableViewportSize() Computes the size of viewport needed to display visibleRowCount rows. |
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Object getPrototypeCellValue() Returns the "prototypical" cell value -- a value used to calculate a fixed width and height for cells. |
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int getScrollableBlockIncrement(Rectangle visibleRect, int orientation, int direction) Returns the distance to scroll to expose the next or previous block. |
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boolean getScrollableTracksViewportHeight() Returns true if this JList is displayed in a JViewport and the viewport is taller than the list's preferred height, or if the layout orientation is VERTICAL_WRAP and visibleRowCount <= 0; otherwise returns false. |
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boolean getScrollableTracksViewportWidth() Returns true if this JList is displayed in a JViewport and the viewport is wider than the list's preferred width, or if the layout orientation is HORIZONTAL_WRAP and visibleRowCount <= 0; otherwise returns false. |
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int getScrollableUnitIncrement(Rectangle visibleRect, int orientation, int direction) Returns the distance to scroll to expose the next or previous row (for vertical scrolling) or column (for horizontal scrolling). |
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int getSelectedIndex() Returns the smallest selected cell index; the selection when only a single item is selected in the list. |
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int[] getSelectedIndices() Returns an array of all of the selected indices, in increasing order. |
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Object getSelectedValue() Returns the value for the smallest selected cell index; the selected value when only a single item is selected in the list. |
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Object[] getSelectedValues() Returns an array of all the selected values, in increasing order based on their indices in the list. |
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Color getSelectionBackground() Returns the color used to draw the background of selected items. |
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Color getSelectionForeground() Returns the color used to draw the foreground of selected items. |
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int getSelectionMode() Returns the current selection mode for the list. |
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ListSelectionModel getSelectionModel() Returns the current selection model. |
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String getToolTipText(MouseEvent event) Returns the tooltip text to be used for the given event. |
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ListUI getUI() Returns the ListUI, the look and feel object that renders this component. |
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String getUIClassID() Returns "ListUI", the UIDefaults key used to look up the name of the javax.swing.plaf.ListUI class that defines the look and feel for this component. |
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boolean getValueIsAdjusting() Returns the value of the selection model's isAdjusting property. |
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int getVisibleRowCount() Returns the value of the visibleRowCount property. |
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Point indexToLocation(int index) Returns the origin of the specified item in the list's coordinate system. |
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boolean isSelectedIndex(int index) Returns true if the specified index is selected, else false. |
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boolean isSelectionEmpty() Returns true if nothing is selected, else false. |
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int locationToIndex(Point location) Returns the cell index closest to the given location in the list's coordinate system. |
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protected String paramString() Returns a String representation of this JList. |
49 |
void removeListSelectionListener(ListSelectionListener listener) Removes a selection listener from the list. |
50 |
void removeSelectionInterval(int index0, int index1) Sets the selection to be the set difference of the specified interval and the current selection. |
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