Friday, 14th October 2011
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GetFileAsString

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getFileAsString is a method that reads the content of a text file and returns it as a java.lang.String.

The name of the file to read is passed in input as a String.

IOException is thrown in case of any problem in reading the file.

Contents

the article

getFileAsString instances a import java.io.BufferedReader to efficiently read the data from the file.

BufferedReader reads text from a character-input stream, buffering characters to provide efficient reading of characters, arrays, and lines.

The java.lang.StringBuffer is basically the same thing as a java.lang.String with the exception that it's mutable and it's methods are thread safe.

At the end of the processing the BufferedReader stream is closed.

getFileAsString 

import java.io.BufferedReader;
import java.io.FileReader;
import java.io.IOException;
 
... 
 
    private final static String NEWLINE = System.getProperty("line.separator");
 
    /**
     * 
     * reads a the content of a file and returns is as a String
     *  
     * @param filename the filename to read
     * @return the String containing the text of the file
     * @throws IOException   
     */
    public static String getFileAsString(String filename) throws IOException {
	try {
	    BufferedReader bufferedReader = new BufferedReader(new FileReader(filename));
	    StringBuffer stringBuffer = new StringBuffer();
	    String line;
	    while ((line = bufferedReader.readLine()) != null) {
		stringBuffer.append(line);
		stringBuffer.append(NEWLINE);
	    }
	    bufferedReader.close();
	    return stringBuffer.toString();
	} catch (IOException e) {
	    throw new IOException ("unable to read from file: "+ filename );
	}
    }


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