More Swing components - An Introduction to Graphical User Interfaces with Java Swing - page 191

Figure 16.7 The two tree applications

File: its/Trees/DirectoryTree.java

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package its.Trees;

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import javax.swing.JTree;

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import javax.swing.tree.DefaultMutableTreeNode;

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import javax.swing.tree.DefaultTreeModel;

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import java.io.File;

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public class DirectoryTree extends JTree {

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private DefaultTreeModel directoryTreeModel;

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// The following path might have to be changed.

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private String startDir = "./its";

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private File startFile;

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public DirectoryTree() {

startFile = new File(startDir); 16.

recursion(startFile); 17.

this .setModel(directoryTreeModel); 18.

} 19.

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21. public DefaultMutableTreeNode recursion(File currentFile)