Introduction
Java.io CharArrayWriter - The character array writer is the class used for writing of data in the form of character array from the character stream. The character array writer is the class which is subclass to writer. But it doesn't use any type of resources like connection or file. The name of the class itself represents that have to write the character array from the stream.
Declaration
Java.io CharArrayWriter class is declared as shown below:
Public class CharArrayWriter extends Writer Fields
Java.io CharArrayWriter class fields are:
- Protected Object lock :The field represents for synchronize operations this object is used.
- Protected int Count :The field represents to the index of characters in stream buffer.
- Protected Char [] buf : The field represents to the buffer where actually the data stored.
Table
| Constructor | Description |
|---|---|
| CharArrayWriter () | The function of this constructor is to create the character array writer and writes in the character buffer called array. |
| CharArrayWriter (int size) | The function of this constructor is to create the character array writer with represented size of buffer. |
Table
| Method | Description |
|---|---|
| void close () | The function of this method is to close the present stream and associated to this stream systems resources are released without any impact. |
| void flush () | The function of this method is to flush the specified output stream. |
| void write (int c) | The function of this method is to write the represented character into output stream. |
| void write (Char[] c, int off, int n) | By using this method it writes the data up to 'n' bytes from the output stream to an array of Characters. |
Description
From the following classes, methods are inherited to the character array writer class.
- Java.io.object
- Java.io.Writer
Examples
Usage of void write(int c) method.
[c]import java.io.CharArrayWriter;
public class CharArrayWriter
{
public static void main(String[] args)
{
int i = 0;
String str = "";
CharArrayWriter chw = null;
try{
// creating a character array writer
chw = new CharArrayWriter();
// To start from integer 65 to 69
for(i = 65; i<80; i++)
{
// To write integer to writer
chw.write(i);
// To get the default character set value
str = chw.toString();
// To print the string
System.out.println(str);
}
}catch(Exception e)
{
// If any I/O error
e.printStackTrace();
}finally
{
// releases all type of system resources from writer
if(chw!=null)
chw.close();
}
}
}[/c]
Output
Following is the result will be displayed.
[c]A
AB
ABC
ABCD
ABCDE
ABCDEF
ABCDEFG
ABCDEFGH
ABCDEFGHI
ABCDEFGHIJ
ABCDEFGHIJK
ABCDEFGHIJKL
ABCDEFGHIJKLM
ABCDEFGHIJKLMN
ABCDEFGHIJKLMNO
[/c]
Usage of CharArrayWriter append (Char c) method.
[c]import java.io.CharArrayWriter;
public class CharArrayWriter
{
public static void main(String[] args)
{
CharArrayWriter chw = null;
// create buffer
char[] ch = {'S','P','L','E','S','S', 'O', 'N', 'S'};
try{
// creating a new character array writer
chw = new CharArrayWriter();
// For to represent each character in the buffer
for(char c:ch)
{
// append character to the writer
chw.append(c);
// To print the character array as in the form string
System.out.println(chw.toString());
}
}catch(Exception e)
{
// If any exception occurs
e.printStackTrace();
}finally
{
// To close the stream
if(chw!=null)
chw.close();
}
}
}[/c]
Output
Following is the result will be displayed.
[c]S
SP
SPL
SPLE
SPLES
SPLESS
SPLESSO
SPLESSON
SPLESSONS
[/c]
Key Points
- Java.io CharArrayWriter - The character array writer is the class used for writing of data in the form of character array from the character stream.
- The character array writer is the class which is subclass to writer.
- But it doesn't use any type of resources like connection or file. The name of the class itself represents that have to write the character array from the stream.