Main.java Source code

Introduction

Here is the source code for Main.java

Source

import java.awt.BorderLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.io.BufferedInputStream;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.Reader;
import java.net.HttpURLConnection;
import java.net.URL;

import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JTextArea;

public class Main extends JFrame {
    JButton go = new JButton("Get Source");

    JTextArea codeArea = new JTextArea();

    public Main() {
        JPanel inputPanel = new JPanel(new BorderLayout(3, 3));
        go.addActionListener(new ActionListener() {
            public void actionPerformed(ActionEvent e) {
                try {
                    URL pageURL = new URL("http://www.google.com");
                    HttpURLConnection urlConnection = (HttpURLConnection) pageURL.openConnection();
                    int respCode = urlConnection.getResponseCode();
                    String response = urlConnection.getResponseMessage();
                    codeArea.setText("HTTP/1.x " + respCode + " " + response + "\n");
                    int count = 1;
                    while (true) {
                        String header = urlConnection.getHeaderField(count);
                        String key = urlConnection.getHeaderFieldKey(count);
                        if (header == null || key == null) {
                            break;
                        }
                        codeArea.append(urlConnection.getHeaderFieldKey(count) + ": " + header + "\n");
                        count++;
                    }
                    InputStream in = new BufferedInputStream(urlConnection.getInputStream());
                    Reader r = new InputStreamReader(in);
                    int c;
                    while ((c = r.read()) != -1) {
                        codeArea.append(String.valueOf((char) c));
                    }
                    codeArea.setCaretPosition(1);
                } catch (Exception ee) {
                }
            }
        });
        inputPanel.add(BorderLayout.EAST, go);
        JScrollPane codeScroller = new JScrollPane(codeArea);
        add(BorderLayout.NORTH, inputPanel);
        add(BorderLayout.CENTER, codeScroller);
        this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        this.setSize(700, 500);
        this.setVisible(true);
    }

    public static void main(String[] args) {
        JFrame webPageSourceViewer = new Main();
    }
}