- 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.- See Also:
- Serialized Form
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Field Summary
Fields Modifier and Type Field Description protected ObjectchildValueValue to create children with.protected booleanhasChildrenDoes the thisJTreehave children?protected booleanloadedChildrenHave the children been loaded yet?-
Fields declared in class javax.swing.tree.DefaultMutableTreeNode
allowsChildren, children, EMPTY_ENUMERATION, parent, userObject
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Constructor Summary
Constructors Constructor 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 Description Enumeration<TreeNode>children()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 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
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Field Detail
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hasChildren
protected boolean hasChildren
Does the thisJTreehave children? This property is currently not implemented.
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childValue
protected Object childValue
Value to create children with.
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loadedChildren
protected boolean loadedChildren
Have the children been loaded yet?
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Constructor Detail
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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:
value- theObjectthat is the value for the new nodechildren- 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
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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.- Parameters:
parent- the parent nodechildren- the children
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isLeaf
public boolean isLeaf()
Returns true if this node allows children. Whether the node allows children depends on how it was created.- Specified by:
isLeafin interfaceTreeNode- Overrides:
isLeafin classDefaultMutableTreeNode- Returns:
- true if this node allows children, false otherwise
- See Also:
JTree.DynamicUtilTreeNode
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getChildCount
public int getChildCount()
Returns the number of child nodes.- Specified by:
getChildCountin interfaceTreeNode- Overrides:
getChildCountin classDefaultMutableTreeNode- Returns:
- the number of child nodes
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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.
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getChildAt
public TreeNode getChildAt(int index)
Subclassed to load the children, if necessary.- Specified by:
getChildAtin interfaceTreeNode- Overrides:
getChildAtin classDefaultMutableTreeNode- Parameters:
index- an index into this node's child array- Returns:
- the TreeNode in this node's child array at the specified index
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children
public Enumeration<TreeNode> children()
Subclassed to load the children, if necessary.- Specified by:
childrenin interfaceTreeNode- Overrides:
childrenin classDefaultMutableTreeNode- Returns:
- an Enumeration of this node's children
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