{"id":1296,"date":"2022-02-27T06:04:23","date_gmt":"2022-02-27T06:04:23","guid":{"rendered":"https:\/\/mdr.foobrdigital.com\/?p=1296"},"modified":"2022-02-27T06:04:23","modified_gmt":"2022-02-27T06:04:23","slug":"writer-class","status":"publish","type":"post","link":"https:\/\/mudassirbackup.infinitycodestudio.com\/index.php\/2022\/02\/27\/writer-class\/","title":{"rendered":"Writer Class"},"content":{"rendered":"\n

In this tutorial, we will learn about Java Writer, its subclasses and its methods with the help of an example.<\/p>\n\n\n\n

The Writer<\/code> class of the java.io<\/code> package is an abstract superclass that represents a stream of characters.<\/p>\n\n\n\n

Since Writer<\/code> is an abstract class, it is not useful by itself. However, its subclasses can be used to write data.<\/p>\n\n\n\n

\n\n\n\n

Subclasses of Writer<\/h2>\n\n\n\n

In order to use the functionality of the Writer<\/code>, we can use its subclasses. Some of them are:<\/p>\n\n\n\n

  • BufferedWriter<\/li>
  • OutputStreamWriter<\/li>
  • FileWriter<\/li>
  • StringWriter<\/li><\/ul>\n\n\n\n
    \"Subclasses<\/figure>\n\n\n\n

    We will learn about all these subclasses in the next tutorial.<\/p>\n\n\n\n

    \n\n\n\n

    Create a Writer<\/h2>\n\n\n\n

    In order to create a Writer<\/code>, we must import the java.io.Writer<\/code> package first. Once we import the package, here is how we can create the writer.<\/p>\n\n\n\n

    \/\/ Creates a Writer\nWriter output = new FileWriter();\n<\/code><\/pre>\n\n\n\n
    Here, we have created a writer named output using the FileWriter<\/code> class. It is because the Writer<\/code> is an abstract class. Hence we cannot create an object of Writer<\/code>.<\/p>\n\n\n\n
    Note<\/strong>: We can also create writers from other subclasses of the Writer<\/code> class.<\/p>\n\n\n\n
    \n\n\n\n
    Methods of Writer<\/h2>\n\n\n\n
    The Writer<\/code> class provides different methods that are implemented by its subclasses. Here are some of the methods:<\/p>\n\n\n\n
    • write(char[] array)<\/code> – writes the characters from the specified array to the output stream<\/li>
    • write(String data)<\/code> – writes the specified string to the writer<\/li>
    • append(char c)<\/code> – inserts the specified character to the current writer<\/li>
    • flush()<\/code> – forces to write all the data present in the writer to the corresponding destination<\/li>
    • close()<\/code> – closes the writer<\/li><\/ul>\n\n\n\n
      \n\n\n\n
      Example: Writer Using FileWriter<\/h2>\n\n\n\n
      Here is how we can implement the Writer<\/code> using the FileWriter<\/code> class.<\/p>\n\n\n\n
      import java.io.FileWriter;\nimport java.io.Writer;\n\npublic class Main {\n\n    public static void main(String args[]) {\n\n        String data = \"This is the data in the output file\";\n\n        try {\n            \/\/ Creates a Writer using FileWriter\n            Writer output = new FileWriter(\"output.txt\");\n\n\n            \/\/ Writes string to the file\n            output.write(data);\n\n            \/\/ Closes the writer\n            output.close();\n        }\n\n        catch (Exception e) {\n            e.getStackTrace();\n        }\n    }\n}\n<\/code><\/pre>\n\n\n\n
      In the above example, we have created a writer using the FileWriter<\/code> class. The writer is linked with the file output.txt<\/strong>.<\/p>\n\n\n\n
      Writer output = new FileWriter(\"output.txt\");\n<\/code><\/pre>\n\n\n\n
      To write data to the output.txt<\/strong> file, we have implemented these methods.<\/p>\n\n\n\n
      output.write(); \n     \/\/ To write data to the file\noutput.close();   \n   \/\/ To close the writer\n<\/code><\/pre>\n\n\n\n
      When we run the program, the output.txt<\/strong> file is filled with the following content.<\/p>\n\n\n\n
      This is a line of text inside the file.<\/code><\/pre>\n","protected":false},"excerpt":{"rendered":"
      In this tutorial, we will learn about Java Writer, its subclasses and its methods with the help of an example. The Writer class of the java.io package is an abstract superclass that represents a stream of characters. Since Writer is an abstract class, it is not useful by itself. However, its subclasses can be used to write data. Subclasses of Writer […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[532],"tags":[],"_links":{"self":[{"href":"https:\/\/mudassirbackup.infinitycodestudio.com\/index.php\/wp-json\/wp\/v2\/posts\/1296"}],"collection":[{"href":"https:\/\/mudassirbackup.infinitycodestudio.com\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/mudassirbackup.infinitycodestudio.com\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/mudassirbackup.infinitycodestudio.com\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/mudassirbackup.infinitycodestudio.com\/index.php\/wp-json\/wp\/v2\/comments?post=1296"}],"version-history":[{"count":0,"href":"https:\/\/mudassirbackup.infinitycodestudio.com\/index.php\/wp-json\/wp\/v2\/posts\/1296\/revisions"}],"wp:attachment":[{"href":"https:\/\/mudassirbackup.infinitycodestudio.com\/index.php\/wp-json\/wp\/v2\/media?parent=1296"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/mudassirbackup.infinitycodestudio.com\/index.php\/wp-json\/wp\/v2\/categories?post=1296"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/mudassirbackup.infinitycodestudio.com\/index.php\/wp-json\/wp\/v2\/tags?post=1296"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}