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8.4

Java Read to End of File

Asked by groyal in Java Programming Language

I am trying to find a ReadToEnd function to remove special characters (carriage returns) from a file. Please review code and provide input. Thanks in advance.

Explanation of Code:
1) The attached code reads the contents of the file into a string.
2) Replace the bad carriage return with null
3) Replace good character return or line feed with ~
4)Split the string variable by the ~ into a string array
5) Loop through the string array and to a file using buffer writer 
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private void jButton1_actionPerformed(ActionEvent e) {
 
 
 
        BufferedReader br = null;
 
        String tmp = "";
 
        String fileContent = "";
 
        try {
 
 
 
            FileReader fr = 
 
                new FileReader("C:\\PAYORDTLCE123008A.TXT"); // read a file This file has bad carriage return in it.
 
 
 
            br = new BufferedReader(fr);
 
 
 
            String line;
 
 
 
 
 
            tmp = br.readLine(); // read first line of file.            
 
 
 
            while (tmp != null) { // read a line until end of file.
 
                
 
                fileContent = fileContent + tmp; //Append the contents of the file to a string to be replaced and split out later.
 
                tmp = br.readLine();
 
 
 
            }
 
            //br.close();
 
        } catch (FileNotFoundException e1) {
 
 
 
            // TODO Auto-generated catch block
 
 
 
            e1.printStackTrace();
 
 
 
        } catch (IOException e2) {
 
 
 
            // TODO Auto-generated catch block
 
 
 
            e2.printStackTrace();
 
 
 
        } finally {
 
            if (br != null) {
 
                try {
 
                    br.close();
 
                } catch (IOException ex) {
 
                    ex.printStackTrace();
 
                }
 
            }
 
        }
 
        
 
        
 
        System.out.println("fileContent value is:" + fileContent);
 
        
 
        //String newline = System.getProperty("line.separator");
 
        System.out.println("Finished reading file");     
 
        //fileContent.replace('\r', '?');
 
        System.out.println("Replacing carriage return with nothing");  
 
        fileContent.replaceAll("\r", " ");
 
        //fileContent.replace('\n', '~');
 
        //fileContent.replaceAll(newline, "~");
 
      fileContent.replaceAll(\n, "~");
 
        System.out.println("fileContent value is:" + fileContent);
 
//problem here is not recognizing new line and not replacing with ~
 
        String[] sites = fileContent.split("~");
 
        System.out.println("new fileContent value is:" + fileContent);
 
        int s1 = sites.length;
 
        BufferedWriter bw = null;
 
        try {
 
            bw =  new BufferedWriter(new FileWriter("C:\\OUT\\PAYORDTLCE123008A_NEW.TXT"));
 
            for (String s: sites) {
 
                if (s != "") {
 
                    bw.write(s);
 
                    bw.newLine();
 
                }
 
            }
 
                //bw.write(fileContent.toString());
 
 
 
        } catch (IOException ex) {
 
            ex.printStackTrace();
 
        } finally {
 
            //Close the BufferedWriter
 
            try {
 
                if (bw != null) {
 
                    bw.flush();
 
                    bw.close();
 
                }
 
            } catch (IOException ex) {
 
                ex.printStackTrace();
 
            }
 
        }
 
 
 
    }
[+][-]01/09/09 09:42 AM, ID: 23338048Accepted Solution

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Zone: Java Programming Language
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Solution Provided By: humanonomics
Participating Experts: 3
Solution Grade: A
 
[+][-]01/09/09 09:43 AM, ID: 23338062Assisted Solution

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[+][-]01/09/09 10:21 AM, ID: 23338549Assisted Solution

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[+][-]09/16/09 07:11 PM, ID: 25352285Administrative Comment

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