LabelJarSample.java Source code

Introduction

Here is the source code for LabelJarSample.java
Source

import java.awt.Container;
import java.awt.GridLayout;
import java.awt.Image;
import java.awt.Toolkit;
import java.io.BufferedInputStream;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.InputStream;

import javax.swing.Icon;
import javax.swing.ImageIcon;
import javax.swing.JFrame;
import javax.swing.JLabel;

public class LabelJarSample {

    public static void main(String args[]) {
        String title = "JLabel Sample";
        JFrame frame = new JFrame(title);
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

        Container content = frame.getContentPane();
        content.setLayout(new GridLayout(2, 2));

        JLabel label1 = new JLabel("Text Label");
        content.add(label1);

        Image warnImage = ImageLoader.getImage(LabelJarSample.class, "Warn.gif");
        Icon warnIcon = new ImageIcon(warnImage);
        JLabel label2 = new JLabel(warnIcon);
        content.add(label2);

        JLabel label3 = new JLabel("Warning", warnIcon, JLabel.CENTER);
        content.add(label3);

        String htmlLabel = "<html><sup>HTML</sup> <sub><em>Label</em></sub><br>"
                + "<font color=\"#FF0080\"><u>Multi-line</u></font>";
        JLabel label4 = new JLabel(htmlLabel);
        content.add(label4);

        frame.setSize(300, 200);
        frame.setVisible(true);
    }
}

final class ImageLoader {

    private ImageLoader() {
    }

    public static Image getImage(Class relativeClass, String filename) {
        Image returnValue = null;
        InputStream is = relativeClass.getResourceAsStream(filename);
        if (is != null) {
            BufferedInputStream bis = new BufferedInputStream(is);
            ByteArrayOutputStream baos = new ByteArrayOutputStream();
            try {
                int ch;
                while ((ch = bis.read()) != -1) {
                    baos.write(ch);
                }
                returnValue = Toolkit.getDefaultToolkit().createImage(baos.toByteArray());
            } catch (IOException exception) {
                System.err.println("Error loading: " + filename);
            }
        }
        return returnValue;
    }
}