Class JTree.DynamicUtilTreeNode
- java.lang.Object
-
- javax.swing.tree.DefaultMutableTreeNode
-
- javax.swing.JTree.DynamicUtilTreeNode
- All Implemented Interfaces:
-
Serializable
,Cloneable
,MutableTreeNode
,TreeNode
- Enclosing class:
- JTree
public static class JTree.DynamicUtilTreeNode extends DefaultMutableTreeNode
DynamicUtilTreeNode
can wrap vectors/hashtables/arrays/strings and create the appropriate children tree nodes as necessary. It is dynamic in that it will only create the children as necessary.
Warning: Serialized objects of this class will not be compatible with future Swing releases. The current serialization support is appropriate for short term storage or RMI between applications running the same version of Swing. As of 1.4, support for long term storage of all JavaBeans™ has been added to the java.beans
package. Please see XMLEncoder
.
- See Also:
- Serialized Form
Field Summary
Modifier and Type | Field | Description |
---|---|---|
protected Object | childValue | Value to create children with. |
protected boolean | hasChildren | Does the this |
protected boolean | loadedChildren | Have the children been loaded yet? |
Fields declared in class javax.swing.tree.DefaultMutableTreeNode
allowsChildren, children, EMPTY_ENUMERATION, parent, userObject
Constructor Summary
Constructor | Description |
---|---|
DynamicUtilTreeNode(Object value,
Object children) | Creates a node with the specified object as its value and with the specified children. |
Method Summary
Modifier and Type | Method | Description |
---|---|---|
Enumeration<TreeNode> | children() | Subclassed to load the children, if necessary. |
static void | createChildren(DefaultMutableTreeNode parent,
Object children) | Adds to parent all the children in |
TreeNode | getChildAt(int index) | Subclassed to load the children, if necessary. |
int | getChildCount() | Returns the number of child nodes. |
boolean | isLeaf() | Returns true if this node allows children. |
protected void | loadChildren() | Loads the children based on |
Methods declared in class javax.swing.tree.DefaultMutableTreeNode
add, breadthFirstEnumeration, clone, depthFirstEnumeration, getAllowsChildren, getChildAfter, getChildBefore, getDepth, getFirstChild, getFirstLeaf, getIndex, getLastChild, getLastLeaf, getLeafCount, getLevel, getNextLeaf, getNextNode, getNextSibling, getParent, getPath, getPathToRoot, getPreviousLeaf, getPreviousNode, getPreviousSibling, getRoot, getSharedAncestor, getSiblingCount, getUserObject, getUserObjectPath, insert, isNodeAncestor, isNodeChild, isNodeDescendant, isNodeRelated, isNodeSibling, isRoot, pathFromAncestorEnumeration, postorderEnumeration, preorderEnumeration, remove, remove, removeAllChildren, removeFromParent, setAllowsChildren, setParent, setUserObject, toString
Methods declared in class java.lang.Object
equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait
Field Detail
hasChildren
protected boolean hasChildren
Does the this JTree
have children? This property is currently not implemented.
childValue
protected Object childValue
Value to create children with.
loadedChildren
protected boolean loadedChildren
Have the children been loaded yet?
Constructor Detail
DynamicUtilTreeNode
public DynamicUtilTreeNode(Object value, Object children)
Creates a node with the specified object as its value and with the specified children. For the node to allow children, the children-object must be an array of objects, a Vector
, or a Hashtable
-- even if empty. Otherwise, the node is not allowed to have children.
- Parameters:
-
value
- theObject
that is the value for the new node -
children
- an array ofObject
s, aVector
, or aHashtable
used to create the child nodes; if any other object is specified, or if the value isnull
, then the node is not allowed to have children
Method Detail
createChildren
public static void createChildren(DefaultMutableTreeNode parent, Object children)
Adds to parent all the children in children
. If children
is an array or vector all of its elements are added is children, otherwise if children
is a hashtable all the key/value pairs are added in the order Enumeration
returns them.
- Parameters:
-
parent
- the parent node -
children
- the children
isLeaf
public boolean isLeaf()
Returns true if this node allows children. Whether the node allows children depends on how it was created.
- Specified by:
-
isLeaf
in interfaceTreeNode
- Overrides:
-
isLeaf
in classDefaultMutableTreeNode
- Returns:
- true if this node allows children, false otherwise
- See Also:
JTree.DynamicUtilTreeNode
getChildCount
public int getChildCount()
Returns the number of child nodes.
- Specified by:
-
getChildCount
in interfaceTreeNode
- Overrides:
-
getChildCount
in classDefaultMutableTreeNode
- Returns:
- the number of child nodes
loadChildren
protected void loadChildren()
Loads the children based on childValue
. If childValue
is a Vector
or array each element is added as a child, if childValue
is a Hashtable
each key/value pair is added in the order that Enumeration
returns the keys.
getChildAt
public TreeNode getChildAt(int index)
Subclassed to load the children, if necessary.
- Specified by:
-
getChildAt
in interfaceTreeNode
- Overrides:
-
getChildAt
in classDefaultMutableTreeNode
- Parameters:
-
index
- an index into this node's child array - Returns:
- the TreeNode in this node's child array at the specified index
children
public Enumeration<TreeNode> children()
Subclassed to load the children, if necessary.
- Specified by:
-
children
in interfaceTreeNode
- Overrides:
-
children
in classDefaultMutableTreeNode
- Returns:
- an Enumeration of this node's children