Download Java.io.InputStreamReader.read(char[] cbuf, int offset, int length

JAVA.IO.INPUTSTREAMREADER.READ METHOD
http://www.tutorialspoint.com/java/io/inputstreamreader_read_char_len.htm
Copyright © tutorialspoint.com
Description
The java.io.InputStreamReader.readchar[]cbuf, intoffset, intlength method reads character into a
portion of an array.
Declaration
Following is the declaration for java.io.InputStreamReader.readchar[]cbuf, intoffset, intlength
method:
public int read(char[] cbuf, int offset, int length)
Parameters
cbuf -- Destination character buffer
offset -- Offset at which to start storing characters
length -- Maximum numbers of characters to read
Return Value
The method returns the number of characters read, else -1 if the end of the stream has been
reached.
Exception
IOException -- If an I/O error occurs
Example
The following example shows the usage of java.io.InputStreamReader.readchar[]cbuf, intoffset, intlength
method.
package com.tutorialspoint;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStreamReader;
public class InputStreamReaderDemo {
public static void main(String[] args) throws IOException {
FileInputStream fis = null;
InputStreamReader isr =null;
char[] cbuf = new char[5];
int i;
try {
// new input stream reader is created
fis = new FileInputStream("C:/test.txt");
isr = new InputStreamReader(fis);
// reads into the char buffer
i = isr.read(cbuf, 2, 3);
// prints the number of characters
System.out.println("Number of characters read: "+i);
// for each character in the character buffer
for(char c:cbuf)
{
// for empty character
if(((int)c)==0)
c='-';
// prints the characters
System.out.println(c);
}
} catch (Exception e) {
// print error
e.printStackTrace();
} finally {
// closes the stream and releases resources associated
if(fis!=null)
fis.close();
if(isr!=null)
isr.close();
}
}
}
Assuming we have a text file c:/test.txt, which has the following content. This file will be used as
an input for our example program:
ABCDE
Let us compile and run the above program, this will produce the following result:
Number of characters read: 3
A
B
C
Loading [MathJax]/jax/output/HTML-CSS/jax.js