Thread: Java code, Try to put header in all text file in folder using textarea, please help me

trying to write code to put header in all the text files in folder and create output text file.. in different folder.. I wrote the code.. using textarea put header in it and using string actually its working the only thing is not working is when i put two or more lines in header i mean in textarea. so in output files print header all in one line.. please help me..

import java.awt.BorderLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileReader;
import java.io.FileWriter;
import java.io.IOException;
 
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JOptionPane;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JTextArea;
import javax.swing.text.Caret;
 
 
public class header3 {
 
	/**
	 * @param args
	 * @throws IOException 
	 */
	public static void main(String[] args) throws IOException {
		// TODO Auto-generated method stub
 
		// File folder = new File("Letters" + File.separator + "LettersIn");
		//System.out.println(folder);
 
		//System.out.println(BFFile);
 
		final JFrame frame = new JFrame("Enter Header");
		JPanel panel = new JPanel();
 
		final JTextArea text = new JTextArea(20,40);
		JButton button = new JButton("Enter");
 
 
 
		frame.add(panel);
		panel.add(text);
		panel.add(button);
 
 
 
		button.addActionListener(new ActionListener(){
			public void actionPerformed(ActionEvent e) {
 
 
				BufferedReader br = null;
 
				BufferedWriter bfAll = null;
 
				File folder = new File("FileIn");
 
				File[] BFFile = folder.listFiles();
 
 
				//Caret header1 = text.getCaret();
 
 
 
 
				String header1 = text.getText();
				System.out.println(header1);
 
 
				text.setLineWrap(true);
				text.setWrapStyleWord(true);
 
				try {
 
				for (File file : BFFile) {
 
					br = new BufferedReader(new FileReader(file));
 
					String filename = file.getName();
					String[] fileInitialName = filename.split("\\.");
 
					System.out.println(folder);
 
					System.out.println(BFFile);
 
					String outFileAllcount = ("FileOut"
							 + File.separator + "out" + fileInitialName[0]  + ".txt");
 
					bfAll = new BufferedWriter(new FileWriter(outFileAllcount));
 
					String line;
 
 
 
 
 
					bfAll.write(header1.toString());
					bfAll.newLine();
 
 
					while ((line = br.readLine()) != null) {
 
					bfAll.write(line.toString());
					bfAll.newLine();
					}
 
 
					bfAll.newLine();
					bfAll.flush();
					bfAll.close();
 
					frame.dispose();
 
				}
				}  catch (Exception e1) {
					System.out.println("Excepton occured !! : " + e1.getMessage());
				}
 
				}
		});
 
		frame.setSize(500,400);
		frame.setVisible(true);
		frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
 
		//String header1 = text.getText();
 
		//String header1 = JOptionPane.showInputDialog("here");
 
 
 
	}
 
}

here is my code please help me..

in output files print header all in one line

It might be that the newline character is being written, but not being displayed properly by whatever program you are using to read the file later. The Windows program Notepad is like this and will often "run lines together".

The text area (like any JTextComponent instance) has a write() method. You could try using that.

//bfAll.write(header1.toString());
text.write(bfAll);
bfAll.newLine();

---

Here's an example to illustrate the difference:

import java.io.IOException;
import java.io.StringWriter;
 
import javax.swing.JTextArea;
 
public class NewLineEg {
    public static void main(String[] args) throws IOException {
        JTextArea foo = new JTextArea();
        foo.setText("abc\ndef");
 
        System.out.print("Using getText(): ");
        writeChars(foo.getText());
        System.out.println();
 
        System.out.print("Using write(): ");
        StringWriter sw = new StringWriter();
        foo.write(sw);
        writeChars(sw.toString());
        System.out.println();
    }
 
    private static void writeChars(String str) {
        for(char ch :str.toCharArray()) {
            System.out.print((int)ch);
            System.out.print(" ");
        }
    }    
}

Note how the first method represents the newline as (char)10, but the second represents it as the sequence (char)13 (char)10. Notepad will render the first sequence correctly, but not the second. What you get using write() depends on what platform you are using: Linux or Windows etc.

Thanks you so much. I got.. it Thanks you so much once again.. now i understand.. thanks you so much for your explanation.. that's good!!

You're welcome.