Swing File Chooser Demo

package main;

import java.awt.BorderLayout;
import java.awt.Insets;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.io.File;
import javax.swing.JButton;
import javax.swing.JComponent;
import javax.swing.JDialog;
import javax.swing.JFileChooser;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JTextArea;

public class SwingFileChooser extends JPanel implements ActionListener{
private static final String newLine = "\n";
private JButton openButton,saveButton;
private JTextArea log;
private JFileChooser fc;

public SwingFileChooser(){
super(new BorderLayout());
initComponents();

}

private void initComponents(){
log = new JTextArea();
log.setMargin(new Insets(5, 5, 5, 5));
log.setEditable(false);
JScrollPane jsp = new JScrollPane(log);
fc = new JFileChooser();
fc.setFileSelectionMode(JFileChooser.FILES_AND_DIRECTORIES);
openButton = new JButton("Open File");
openButton.addActionListener(this);
saveButton = new JButton("Save File");
saveButton.addActionListener(this);
JPanel buttonPanel = new JPanel();
buttonPanel.add(openButton);
buttonPanel.add(saveButton);
add(buttonPanel,BorderLayout.NORTH);
add(jsp,BorderLayout.CENTER);
}

@Override
public void actionPerformed(ActionEvent e) {
if(e.getSource() == openButton){
int returnVal = fc.showOpenDialog(this);
if(returnVal == JFileChooser.APPROVE_OPTION){
File file = fc.getSelectedFile();
log.append("Opening " + file.getName() + newLine);
}else{
log.append("cancelled file opening" + newLine);
}
log.setCaretPosition(log.getDocument().getLength());

}else if(e.getSource() == saveButton){
int returnVal = fc.showSaveDialog(this);
if(returnVal == JFileChooser.APPROVE_OPTION){
File file = fc.getSelectedFile();
log.append("Saving " + file.getName() + newLine);
}else{
log.append("cancelled file saving" + newLine);
}
log.setCaretPosition(log.getDocument().getLength());
}
}

private static void createGUI(){
JFrame.setDefaultLookAndFeelDecorated(true);
JDialog.setDefaultLookAndFeelDecorated(true);
JFrame frame = new JFrame("SwingFileChooser");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

JComponent newContentPane = new SwingFileChooser();
newContentPane.setOpaque(true);
frame.setContentPane(newContentPane);
frame.pack();
frame.setVisible(true);
}

public static void main(String[] args) {
javax.swing.SwingUtilities.invokeLater(new Runnable() {

@Override
public void run() {
createGUI();
}
});

}
}

Create Charts with jFreeChart

This tutorial is all about creating graphs. There are several tools for generating graphs without any hassle. Programming a graph from scratch might little be  tricky as it also deals with some graphics. Using a tool or library reduces the development time a lot. So we gonna use an OpenSource chart tool named jFreeChart for Java development.

Creating a graph with jFreeChart is just a matter of entering the required graph data and a little piece of code. Therefore, as the CodeZone4 norm I just go ahead with a 3D bar graph implementation using jFreeChart.

You can find source code for other types of graph on the internet.

First download required JARs from jFreeChart and add them in your project's classpath.

import org.jfree.chart.*;
import org.jfree.data.category.*;
import org.jfree.data.general.DefaultPieDataset;
import org.jfree.data.xy.*;
import org.jfree.data.*;
import org.jfree.chart.renderer.category.*;
import org.jfree.chart.plot.*;
import java.awt.*;

public class Main {

public static void main(String[] args) {
DefaultCategoryDataset dataset = new DefaultCategoryDataset();
dataset.setValue(3780, "A", "2008");
dataset.setValue(5000, "B", "2008");
dataset.setValue(6500, "A", "2009");
dataset.setValue(6000, "B", "2009");
dataset.setValue(9000, "A", "2010");
dataset.setValue(10000, "B", "2010");
JFreeChart chart = ChartFactory.createBarChart3D("Annual Income Analysis", "Year", "Income",
dataset, PlotOrientation.VERTICAL, true, true, false);
chart.setBackgroundPaint(Color.yellow);
chart.getTitle().setPaint(Color.blue);
CategoryPlot p = chart.getCategoryPlot();
p.setRangeGridlinePaint(Color.red);
ChartFrame frame1 = new ChartFrame("Income Data", chart);
frame1.setVisible(true);
frame1.setSize(300, 300);
}
}