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Thread: Read and write file in Java

  1. #1
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    Default Read and write file in Java

    Read file is at the first part and write file is at the second part. Try it
    This example is at Learn Your Java From Here: Read and write file
    There are more example or Java learning in Learn Your Java From Here

    		// get which file you want to read and write
    		File file = new File("D://test.txt");
     
    		try {
     
    			// check whether the file is existed or not
    			if (file.exists()) {
     
    				// create a new file if the file is not existed
    				file.createNewFile();
    			}
     
    			// new a writer and point the writer to the file
    			BufferedWriter writer = new BufferedWriter(new FileWriter(file));
     
    			// writer the content to the file
    			writer.write("I write something to a file.");
     
    			// always remember to close the writer
    			writer.close();
    			writer = null;
    		} catch (IOException e) {
    			e.printStackTrace();
    		}
     
    		try {
     
    			// new a reader and point the reader to the file
    			BufferedReader reader = new BufferedReader(new FileReader(file));
     
    			String line = "";
    			System.out.println("Content of the file\n================================");
    			while ((line = reader.readLine()) != null) {
    				System.out.println(line);
    			}
    			reader.close();
    			reader = null;
    		} catch (FileNotFoundException e) {
    			e.printStackTrace();
    		} catch (IOException e) {
    			e.printStackTrace();
    		}
    Last edited by waiheng1986; March 11th, 2012 at 09:16 AM.


  2. #2
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    Default Re: Read and write file in Java

    Thanks for the tip. However the statements that set null reference to the reader and writer are redundant.

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