SortFile

package sortFile;

import java.awt.BorderLayout;
import java.awt.EventQueue;

import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.border.EmptyBorder;
import javax.swing.JTextField;
import javax.swing.JLabel;
import javax.swing.JButton;
import java.awt.event.ActionListener;
import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.FileNotFoundException;
import java.io.FileReader;
import java.io.FileWriter;
import java.io.IOException;
import java.io.PrintWriter;
import java.awt.event.ActionEvent;

@SuppressWarnings({ "unused", "serial" })
public class NewJFrame extends JFrame {

    private JPanel contentPane;
    private JTextField textField;
    private JTextField textField_1;
    private JTextField textField_2;
    private String path,path_temp1,path_temp2;
    /**
     * Launch the application.
     */
    public static void main(String[] args) {
        EventQueue.invokeLater(new Runnable() {
            public void run() {
                try {
                    NewJFrame frame = new NewJFrame();
                    frame.setVisible(true);
                } catch (Exception e) {
                    e.printStackTrace();
                }
            }
        });
    }

    /**
     * Create the frame.
     */
    public NewJFrame() {
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        setTitle("Natural Merge Sort");
        setBounds(100, 100, 554, 300);
        contentPane = new JPanel();
        contentPane.setBorder(new EmptyBorder(5, 5, 5, 5));
        setContentPane(contentPane);
        contentPane.setLayout(null);

        textField = new JTextField();
        textField.addActionListener(new ActionListener() {
            public void actionPerformed(ActionEvent arg0) {
                path = textField.getText();
            }
        });
        textField.setBounds(322, 21, 151, 20);
        contentPane.add(textField);
        textField.setColumns(10);

        textField_1 = new JTextField();
        textField_1.addActionListener(new ActionListener() {
            public void actionPerformed(ActionEvent e) {
                path_temp1 = textField_1.getText();
            }
        });
        textField_1.setBounds(322, 52, 151, 20);
        contentPane.add(textField_1);
        textField_1.setColumns(10);

        textField_2 = new JTextField();
        textField_2.addActionListener(new ActionListener() {
            public void actionPerformed(ActionEvent e) {
                path_temp2 = textField_2.getText();
            }
        });
        textField_2.setBounds(322, 83, 151, 20);
        contentPane.add(textField_2);
        textField_2.setColumns(10);

        JLabel lblciekaDoPliku = new JLabel("Ścieżka do pliku źródłowego");
        lblciekaDoPliku.setBounds(23, 24, 289, 14);
        contentPane.add(lblciekaDoPliku);

        JLabel lblciekaDoPierwszego = new JLabel("\u015Acie\u017Cka do pierwszego pliku tymczasowego");
        lblciekaDoPierwszego.setBounds(21, 55, 291, 14);
        contentPane.add(lblciekaDoPierwszego);

        JLabel lblciekaDoDrugiego = new JLabel("\u015Acie\u017Cka do drugiego pliku tymczasowego");
        lblciekaDoDrugiego.setBounds(23, 89, 289, 14);
        contentPane.add(lblciekaDoDrugiego);

        JButton btnSortuj = new JButton("Sortuj");
        btnSortuj.addActionListener(new ActionListener() {
            public void actionPerformed(ActionEvent e) {
                try {
                    naturalMerge(path,path_temp1,path_temp2);
                } catch (IOException e1) {
                    // TODO Auto-generated catch block
                    e1.printStackTrace();
                }
            }

            private void naturalMerge(String path, String path_temp1, String path_temp2) throws IOException {
                // TODO Auto-generated method stub
                boolean isEmpty2 = false;
                while(!isEmpty2)
                {
                    BufferedReader in = new BufferedReader(new FileReader(path));
                    PrintWriter out1 = new PrintWriter(new BufferedWriter(new FileWriter(path_temp1)));
                    PrintWriter out2 = new PrintWriter(new BufferedWriter(new FileWriter(path_temp2)));
                    //Rozdzielanie pliku
                    String line = null;
                    String prevline = null;
                    isEmpty2 = true;
                    boolean swapFiles = true;
                    if((line = in.readLine()) != null)
                    {
                        out1.println(line);
                        prevline = line;
                    }
                    while((line = in.readLine()) != null)
                    {
                        if(prevline.compareTo(line) > 0)
                            swapFiles = !swapFiles;
                        if(swapFiles)
                            out1.println(line);
                        else
                        {
                            out2.println(line);
                            isEmpty2 = false;
                        }
                        prevline = line;
                    }
                    in.close();
                    out1.close();
                    out2.close();
                    //Scalanie plików
                    String tmp1,tmp2;
                    String prevTmp1 = null;
                    String prevTmp2 = null;
                    boolean endOfRunTmp1,endOfRunTmp2;
                    BufferedReader in1 = new BufferedReader(new FileReader(path_temp1));
                    BufferedReader in2 = new BufferedReader(new FileReader(path_temp2));
                    PrintWriter out = new PrintWriter(new BufferedWriter(new FileWriter(path)));
                    tmp1 = in1.readLine();
                    tmp2 = in2.readLine();
                    endOfRunTmp1 = (tmp1 == null);
                    endOfRunTmp2 = (tmp2 == null);
                    while(tmp1 != null || tmp2 != null)
                    {
                        while(!endOfRunTmp1 && !endOfRunTmp2)
                            if(tmp2.compareTo(tmp1) > 0)
                            {
                                out.println(tmp1);
                                prevTmp1 = tmp1;
                                tmp1 = in1.readLine();
                                if(tmp1 == null || prevTmp1.compareTo(tmp1) > 0)
                                    endOfRunTmp1 = true;
                            }
                            else
                            {
                                out.println(tmp2);
                                prevTmp2 = tmp2;
                                tmp2 = in2.readLine();
                                if(tmp2 == null || prevTmp2.compareTo(tmp2) > 0)
                                    endOfRunTmp2 = true;
                            }
                        while(!endOfRunTmp1)
                        {
                            out.println(tmp1);
                            prevTmp1 = tmp1;
                            tmp1 = in1.readLine();
                            if(tmp1 == null || prevTmp1.compareTo(tmp1) > 0)
                                endOfRunTmp1 = true;
                        }
                        while(!endOfRunTmp2)
                        {
                            out.println(tmp2);
                            prevTmp2 = tmp2;
                            tmp2 = in2.readLine();
                            if(tmp2 == null || prevTmp2.compareTo(tmp2) > 0)
                                endOfRunTmp2 = true;
                        }
                        endOfRunTmp1 = (tmp1 == null);
                        endOfRunTmp2 = (tmp2 == null);
                        prevTmp1 = null;
                        prevTmp2 = null;
                    }
                    in1.close();
                    in2.close();
                    out.close();
                }
            }
        });
        btnSortuj.setBounds(239, 176, 89, 23);
        contentPane.add(btnSortuj);
    }
}