JTree組件

Question

如何更改節點的擺動JTree組件的圖標和根？

Answer 1

使用DefaultTreeCellRenderer使用setClosedIcon,setOpenIcon和setLeafIcon。

從How to Use Trees複製：

ImageIcon leafIcon = createImageIcon("images/middle.gif"); 
if (leafIcon != null) { 
    DefaultTreeCellRenderer renderer = 
    new DefaultTreeCellRenderer(); 
    renderer.setLeafIcon(leafIcon); 
    tree.setCellRenderer(renderer); 
} 

Answer 2

Sun的Tutorial上JTree的對如何繼承的TreeCellRenderer得到節點和文本JTree中節。

Answer 3

如果你想要做的是有封閉的節點，葉和開節點不同的圖標，這是非常簡單的。

//創建3個圖標 private Icon customOpenIcon = new ImageIcon（「images/my_open.gif」）; 私人圖標customClosedIcon =新的ImageIcon（ 「圖像/ my_closed.gif」）; 私人圖標customLeafIcon =新的ImageIcon（ 「圖像/ my_leaf.gif」）;

//假設您創建DefaultMutableTreeNode層次 DefaultMutableTreeNode根節點=新... ... JTree的 樹=新的JTree（根節點）;

DefaultTreeCellRenderer customRenderer = new DefaultTreeCellRenderer(); 
customRenderer.setOpenIcon(customOpenIcon); 
customRenderer.setClosedIcon(customClosedIcon); 
customRenderer.setLeafIcon(customLeafIcon); 
tree.setCellRenderer(customRenderer);