- Java.io package classes
- Java.io - Home
- Java.io - BufferedInputStream
- Java.io - BufferedOutputStream
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- Java.io - DataInputStream
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- Java.io - File
- Java.io - FileDescriptor
- Java.io - FileInputStream
- Java.io - FileOutputStream
- Java.io - FilePermission
- Java.io - FileReader
- Java.io - FileWriter
- Java.io - FilterInputStream
- Java.io - FilterOutputStream
- Java.io - FilterReader
- Java.io - FilterWriter
- Java.io - InputStream
- Java.io - InputStreamReader
- Java.io - LineNumberInputStream
- Java.io - LineNumberReader
- Java.io - ObjectInputStream
- Java.io - ObjectInputStream.GetField
- Java.io - ObjectOutputStream
- io - ObjectOutputStream.PutField
- Java.io - ObjectStreamClass
- Java.io - ObjectStreamField
- Java.io - OutputStream
- Java.io - OutputStreamWriter
- Java.io - PipedInputStream
- Java.io - PipedOutputStream
- Java.io - PipedReader
- Java.io - PipedWriter
- Java.io - PrintStream
- Java.io - PrintWriter
- Java.io - PushbackInputStream
- Java.io - PushbackReader
- Java.io - RandomAccessFile
- Java.io - Reader
- Java.io - SequenceInputStream
- Java.io - SerializablePermission
- Java.io - StreamTokenizer
- Java.io - StringBufferInputStream
- Java.io - StringReader
- Java.io - StringWriter
- Java.io - Writer
- Java.io package extras
- Java.io - Interfaces
- Java.io - Exceptions
- Java.io package Useful Resources
- Java.io - Discussion
Java.io.FilterReader.read() Method
Description
The java.io.FilterReader.read(char[] cbuf, int off, int len) method reads character of length len into the array, starting at offset off.
Declaration
Following is the declaration for java.io.FilterReader.read(char[] cbuf, int off, int len) method −
public int read(char[] cbuf, int off, int len)
Parameters
cbuf − Destination buffer.
off − Offset at which to start storing characters.
len − Number of characters to read.
Return Value
This method returns the number of characters to read, or -1 if the end of the stream is reached.
Exception
IOException − If an I/O error occurs.
Example
The following example shows the usage of java.io.FilterReader.read(char[] cbuf, int off, int len) method.
package com.tutorialspoint; import java.io.FilterReader; import java.io.Reader; import java.io.StringReader; public class FilterReaderDemo { public static void main(String[] args) throws Exception { FilterReader fr = null; Reader r = null; char[] cbuf = new char[6]; int i = 0; try { // create new reader r = new StringReader("ABCDEF"); // create new filter reader fr = new FilterReader(r) { }; // read data of len 4, to the buffer i = fr.read(cbuf, 2, 4); System.out.println("No. of characters read: "+i); // read till the end of the char buffer for(char c:cbuf) { // checks for the empty character in buffer if((byte)c == 0) c = '-'; // prints System.out.print(c); } } catch(Exception e) { // if any I/O error occurs e.printStackTrace(); } finally { // releases system resources associated with this stream if(r!=null) r.close(); if(fr!=null) fr.close(); } } }
Let us compile and run the above program, this will produce the following result −
No. of characters read: 4 --ABCD
java_io_filterreader.htm
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