MainClass.java Source code

Introduction

Here is the source code for MainClass.java

Source

import java.awt.BorderLayout;
import java.util.Vector;

import javax.swing.JFrame;
import javax.swing.JScrollPane;
import javax.swing.JTree;
import javax.swing.tree.DefaultTreeModel;
import javax.swing.tree.TreeModel;
import javax.swing.tree.TreePath;

public class MainClass {
    public static void main(String args[]) {
        JFrame frame = new JFrame("Swing Package Hierarchy");
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

        Vector rootVector = new TreeVector("A", new String[] { "a" });
        JTree tree = new JTree(rootVector);
        tree.setRootVisible(true);
        TreeModel model = tree.getModel();
        model.valueForPathChanged(new TreePath(model.getRoot()), "javax.swing");
        ((DefaultTreeModel) model).reload();

        JScrollPane scrollPane = new JScrollPane(tree);
        frame.getContentPane().add(scrollPane, BorderLayout.CENTER);
        frame.setSize(300, 300);
        frame.setVisible(true);
    }
}

class TreeVector extends Vector {
    String name;

    TreeVector(String name) {
        this.name = name;
    }

    TreeVector(String name, Object elements[]) {
        this.name = name;
        for (int i = 0, n = elements.length; i < n; i++) {
            add(elements[i]);
        }
    }

    public String toString() {
        return name;
    }
}