MainClass.java Source code

Introduction

Here is the source code for MainClass.java

Source

import java.awt.BorderLayout;
import java.awt.Component;

import javax.swing.JFrame;
import javax.swing.JScrollPane;
import javax.swing.JTree;
import javax.swing.ToolTipManager;
import javax.swing.tree.DefaultMutableTreeNode;
import javax.swing.tree.DefaultTreeCellRenderer;
import javax.swing.tree.TreeCellRenderer;

public class MainClass {

    public static void main(final String args[]) {
        JFrame frame = new JFrame("Tree Tips");
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

        JTree tree = new JTree(new String[] { "a", "b", "c" });
        ToolTipManager.sharedInstance().registerComponent(tree);
        TreeCellRenderer renderer = new ToolTipTreeCellRenderer();
        tree.setCellRenderer(renderer);
        JScrollPane scrollPane = new JScrollPane(tree);
        frame.add(scrollPane, BorderLayout.CENTER);
        frame.setSize(300, 150);
        frame.setVisible(true);
    }
}

class ToolTipTreeCellRenderer implements TreeCellRenderer {
    DefaultTreeCellRenderer renderer = new DefaultTreeCellRenderer();

    public ToolTipTreeCellRenderer() {
    }

    public Component getTreeCellRendererComponent(JTree tree, Object value, boolean selected, boolean expanded,
            boolean leaf, int row, boolean hasFocus) {

        Object tip = null;
        if (value != null) {

            if (value instanceof DefaultMutableTreeNode) {
                tip = ((DefaultMutableTreeNode) value).getUserObject();
            } else {
                tip = tree.convertValueToText(value, selected, expanded, leaf, row, hasFocus);
            }
            renderer.setToolTipText((String) tip);
        }
        renderer.setText((String) tip);
        return renderer;
    }
}