I want to display a tree in a Java GUI, but I dont know how. The tree represents a graph of connected nodes, like this:
I should say that I have my own tree class:
public class BinaryTree
{
private BinaryNode root;
public BinaryTree( )
{
root = null;
}
public BinaryTree( Object rootItem )
{
root = new BinaryNode( rootItem, null, null );
}
public BinaryTree( Object rootItem,BinaryNode a,BinaryNode b )
{
root = new BinaryNode( rootItem, a, b );
}
public int leavesCount(){
return BinaryNode.leavesCount(root);
}
public boolean equal(BinaryTree a,BinaryTree b){
return BinaryNode.equal(a.root, b.root);
}
public void printPreOrder( )
{
if( root != null )
root.printPreOrder( );
}
public void printInOrder( )
{
if( root != null )
root.printInOrder( );
}
public void printPostOrder( )
{
if( root != null )
root.printPostOrder( );
}
public void makeEmpty( )
{
root = null;
}
public boolean isEmpty( )
{
return root == null;
}
public void merge( Object rootItem, BinaryTree t1, BinaryTree t2 ) throws MergeAbrot
{
if( t1.root == t2.root && t1.root != null )
{
throw new MergeAbrot("MergeAbrot");
}
root=new BinaryNode( rootItem, t1.root, t2.root );
if( this != t1 )
t1.root = null;
if( this != t2 )
t2.root = null;
}
public int size( )
{
return BinaryNode.size( root );
}
public int height( )
{
return BinaryNode.height( root );
}
}
I only want to draw the tree. How should I do?
You might consider any of these:
JHotDraw, cited here, a meta-library for creating custom graph editors.
Prefuse visualization library, illustrated here and here.
Batik, which implements SVG rendering.
JGraph demo and user manual.
GraphStream, illustrated here.
JFreeChart XYBubbleRenderer
A JTree
, suggested here, with a custom TreeIcon
.
A custom renderer, with x based on a fraction of tree breadth and y based on recursion level.
A simple graph editor such as draw.GraphPanel
, illustrated here.
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