绑定HashMap< String,String>到MutableTreeNode [英] Binding HashMap<String, String> to MutableTreeNode
问题描述
我需要将Hashmap
绑定到MutableTreeNode
,以便可以在JTree
中显示它.
I need to bind a Hashmap
to a MutableTreeNode
so that I can display that in a JTree
.
我有以下代码:
static Map<String, String> form = new LinkedHashMap<String,String>();
我想这就是实现MutableTreeNode
的方式.我只是不知道现在如何进行操作以使表单"的键出现在MutableTreeNode
中.
I guess this is how I need to implement MutableTreeNode
. I just don't know how to procees now to get the Key's of "form" to show up in the MutableTreeNode
.
public class MyNode implements MutableTreeNode {
@Override
public Enumeration children() {
// TODO Auto-generated method stub
return null;
}
@Override
public boolean getAllowsChildren() {
// TODO Auto-generated method stub
return false;
}
@Override
public TreeNode getChildAt(int childIndex) {
// TODO Auto-generated method stub
return null;
}
@Override
public int getChildCount() {
// TODO Auto-generated method stub
return 0;
}
@Override
public int getIndex(TreeNode node) {
// TODO Auto-generated method stub
return 0;
}
@Override
public TreeNode getParent() {
// TODO Auto-generated method stub
return null;
}
@Override
public boolean isLeaf() {
// TODO Auto-generated method stub
return false;
}
@Override
public void insert(MutableTreeNode arg0, int arg1) {
// TODO Auto-generated method stub
}
@Override
public void remove(int arg0) {
// TODO Auto-generated method stub
}
@Override
public void remove(MutableTreeNode arg0) {
// TODO Auto-generated method stub
}
@Override
public void removeFromParent() {
// TODO Auto-generated method stub
}
@Override
public void setParent(MutableTreeNode arg0) {
// TODO Auto-generated method stub
}
@Override
public void setUserObject(Object arg0) {
// TODO Auto-generated method stub
}
MutableTreeNode
正确显示正确的Key
值后,我希望能够这样做:
After the MutableTreeNode
correctly shows the correct Key
value, I want to be able to do:
final JTree tree = new JTree();
final DefaultMutableTreeNode CustomNode = new DefaultMutableTreeNode("Custom");
DefaultTreeModel tm = new DefaultTreeModel(CustomNode);
tree.setModel(tm);
for (String str : form.keySet())
{
MyNode nod = new MyNode(str);
CustomNode.add(node);
}
tm.reload();
推荐答案
您可能需要TreeModel
接口的自定义实现.如 如何使用树:创建数据型号 ,
You probably want a custom implementation of the TreeModel
interface. As noted in How to Use Trees: Creating a Data Model,
TreeModel
接口接受任何类型的对象作为树节点.它不需要节点由DefaultMutableTreeNode
对象表示,甚至不需要节点实现TreeNode
接口.
The
TreeModel
interface accepts any kind of object as a tree node. It does not require that nodes be represented byDefaultMutableTreeNode
objects, or even that nodes implement theTreeNode
interface.
尽管您的Map<String, String>
并非本质上是分层的,但您可能会从FileTreeModel
在此处和
Although your Map<String, String>
is not intrinsically hierarchical, you may get an idea from the GenealogyModel
, cited here, or the FileTreeModel
cited here and here.
这篇关于绑定HashMap< String,String>到MutableTreeNode的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持IT屋!