javax.swing
Class JTree.DynamicUtilTreeNode
- java.lang.Object
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- javax.swing.tree.DefaultMutableTreeNode
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- javax.swing.JTree.DynamicUtilTreeNode
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- All Implemented Interfaces:
- Serializable, Cloneable, MutableTreeNode, TreeNode
- Enclosing class:
- JTree
public static class JTree.DynamicUtilTreeNode extends DefaultMutableTreeNode
DynamicUtilTreeNodecan 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.beanspackage. Please seeXMLEncoder.
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Field Summary
Fields Modifier and Type Field and Description protected ObjectchildValueValue to create children with.protected booleanhasChildrenDoes the thisJTreehave children? This property is currently not implemented.protected booleanloadedChildrenHave the children been loaded yet?-
Fields inherited from class javax.swing.tree.DefaultMutableTreeNode
allowsChildren, children, EMPTY_ENUMERATION, parent, userObject
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Constructor Summary
Constructors Constructor and Description DynamicUtilTreeNode(Object value, Object children)Creates a node with the specified object as its value and with the specified children.
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Method Summary
All Methods Static Methods Instance Methods Concrete Methods Modifier and Type Method and Description Enumerationchildren()Subclassed to load the children, if necessary.static voidcreateChildren(DefaultMutableTreeNode parent, Object children)Adds to parent all the children inchildren.TreeNodegetChildAt(int index)Subclassed to load the children, if necessary.intgetChildCount()Returns the number of child nodes.booleanisLeaf()Returns true if this node allows children.protected voidloadChildren()Loads the children based onchildValue.-
Methods inherited from 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
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Field Detail
hasChildren
protected boolean hasChildren
Does the thisJTreehave 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?
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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, aVector, or aHashtable-- even if empty. Otherwise, the node is not allowed to have children.- Parameters:
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value- theObjectthat is the value for the new node -
children- an array ofObjects, aVector, or aHashtableused 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
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Method Detail
createChildren
public static void createChildren(DefaultMutableTreeNode parent, Object children)
Adds to parent all the children inchildren. Ifchildrenis an array or vector all of its elements are added is children, otherwise ifchildrenis a hashtable all the key/value pairs are added in the orderEnumerationreturns them.
isLeaf
public boolean isLeaf()
Returns true if this node allows children. Whether the node allows children depends on how it was created.- Specified by:
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isLeafin interfaceTreeNode - Overrides:
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isLeafin classDefaultMutableTreeNode - Returns:
- true if this node allows children, false otherwise
- See Also:
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JTree.DynamicUtilTreeNode
getChildCount
public int getChildCount()
Returns the number of child nodes.- Specified by:
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getChildCountin interfaceTreeNode - Overrides:
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getChildCountin classDefaultMutableTreeNode - Returns:
- the number of child nodes
loadChildren
protected void loadChildren()
Loads the children based onchildValue. IfchildValueis aVectoror array each element is added as a child, ifchildValueis aHashtableeach key/value pair is added in the order thatEnumerationreturns the keys.
getChildAt
public TreeNode getChildAt(int index)
Subclassed to load the children, if necessary.- Specified by:
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getChildAtin interfaceTreeNode - Overrides:
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getChildAtin classDefaultMutableTreeNode - Parameters:
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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 children()
Subclassed to load the children, if necessary.- Specified by:
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childrenin interfaceTreeNode - Overrides:
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childrenin classDefaultMutableTreeNode - Returns:
- an Enumeration of this node's children
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