Module java.desktop
Package javax.swing

Class JTree.DynamicUtilTreeNode

All Implemented Interfaces:
Serializable, Cloneable, MutableTreeNode, TreeNode
Enclosing class:

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.

  • Field Details

    • 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 Details

    • 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.
      value - the Object that is the value for the new node
      children - an array of Objects, a Vector, or a Hashtable used to create the child nodes; if any other object is specified, or if the value is null, then the node is not allowed to have children
  • Method Details

    • 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.
      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 interface TreeNode
      isLeaf in class DefaultMutableTreeNode
      true if this node allows children, false otherwise
      See Also:
    • getChildCount

      public int getChildCount()
      Returns the number of child nodes.
      Specified by:
      getChildCount in interface TreeNode
      getChildCount in class DefaultMutableTreeNode
      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 interface TreeNode
      getChildAt in class DefaultMutableTreeNode
      index - an index into this node's child array
      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 interface TreeNode
      children in class DefaultMutableTreeNode
      an Enumeration of this node's children