46 lines
1.4 KiB
Java
46 lines
1.4 KiB
Java
package tree;
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import javax.swing.*;
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import javax.swing.tree.*;
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/**
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* This frame contains a simple tree that displays a manually constructed tree model.
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*/
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public class SimpleTreeFrame extends JFrame
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{
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private static final int DEFAULT_WIDTH = 300;
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private static final int DEFAULT_HEIGHT = 200;
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public SimpleTreeFrame()
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{
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setSize(DEFAULT_WIDTH, DEFAULT_HEIGHT);
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// set up tree model data
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DefaultMutableTreeNode root = new DefaultMutableTreeNode("World");
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DefaultMutableTreeNode country = new DefaultMutableTreeNode("USA");
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root.add(country);
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DefaultMutableTreeNode state = new DefaultMutableTreeNode("California");
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country.add(state);
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DefaultMutableTreeNode city = new DefaultMutableTreeNode("San Jose");
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state.add(city);
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city = new DefaultMutableTreeNode("Cupertino");
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state.add(city);
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state = new DefaultMutableTreeNode("Michigan");
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country.add(state);
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city = new DefaultMutableTreeNode("Ann Arbor");
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state.add(city);
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country = new DefaultMutableTreeNode("Germany");
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root.add(country);
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state = new DefaultMutableTreeNode("Schleswig-Holstein");
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country.add(state);
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city = new DefaultMutableTreeNode("Kiel");
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state.add(city);
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// construct tree and put it in a scroll pane
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JTree tree = new JTree(root);
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add(new JScrollPane(tree));
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}
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}
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