Writing Output To A File

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posted 15 years ago

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Hi Guys, Im new to Java and am looking for a solution to a printWriter issue im having.

So far my program works fine up to the point where I want to write its final output to a new file.
The program itself compiles with no errors, however, even when given a direct route to write the file to it still does not produce anything. Please can anyone help.

I've tried some debugging using system.out.println()'s but am not really having any success.
I'll attach the code below. thanks so much for your time.

regards S

/**import java librarys*/
import java.io.BufferedReader;
import java.io.FileNotFoundException;
import java.io.FileReader;
import java.io.IOException;
import java.util.ArrayList;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
import java.util.Collections;
import java.util.List;
import java.io.PrintWriter;
import java.io.FileWriter;

/** class to find string */
public class Find {
	BufferedReader br = null;

/** method to read html file line by line and return string to tore in array */
	public Find() throws java.io.IOException {
		try {
			/** read in file */
			br = new BufferedReader(
					new FileReader(
							"C:/Documents and Settings/Kieren McDonald/Desktop/Nick/Java/Test/timelinemanager_resource.htm"));
			/**
			 * declaring string identifiers for beginning and end of string
			 * aswel as one other line string to store the data between
			 */
			String resourceline = null;
			String beg = "<@dynamichtml ";
			String end = "@>";
			ArrayList<String> arrayList = new ArrayList<String>();
			/** while line is not equal to null then find 3 string values */
			while ((resourceline = br.readLine()) != null) {
				resourceline = find(beg, end, resourceline);

/**
				 * if line is not equal to null store line in array list adding
				 * a resource name
				 */
				if (resourceline != null) {
					resourceline= resourceline.trim();
					arrayList.add(resourceline);
					
				}

}
			sortAndPrint(arrayList);
			writeResults(arrayList, "C:\\Documents and Settings\\Kieren McDonald\\Desktop\\Nick\\Java\\Test\\filetest.txt");
		} catch (FileNotFoundException ex) {
			ex.printStackTrace();
		} finally {
			br.close();
		}
	}

/** method to sort and print the array collection */
	private void sortAndPrint(List<String> results) {
		Collections.sort(results,String.CASE_INSENSITIVE_ORDER);
		for (String resourceline : results)
			System.out.println(resourceline);
	}

/** method to find the value between the beginning and end of a string */
	public String find(String beg, String end, String resourceline) {
		/** match pattern to store string between strings and match to line */
		Pattern p = Pattern.compile(beg + "(.*)" + end);
		Matcher m = p.matcher(resourceline);
		return m.find() ? resourceline.substring(m.start(1), m.end(1)) : null;
	}
	/** method to print the results of the array into a new document */
	private void writeResults(ArrayList<String> arrayList, String filename) {   
    try {   
        PrintWriter writer = new PrintWriter( filename );   
  
        for (String resourceline : arrayList)   
            writer.println( resourceline );   
  
        writer.close();   
    }   
    catch( Exception e ) {   
        System.err.println( "can't create output file \"" + filename + "\"" );   
        e.printStackTrace();   
    }   
}

/** main method to find the resource name calling */
	public static void main(String[] args) throws IOException {
		Find findResources = new Find();
	}
}

David Newton

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Posts: 12617