- Java.io package classes
- Java.io - Home
- Java.io - BufferedInputStream
- Java.io - BufferedOutputStream
- Java.io - BufferedReader
- Java.io - BufferedWriter
- Java.io - ByteArrayInputStream
- Java.io - ByteArrayOutputStream
- Java.io - CharArrayReader
- Java.io - CharArrayWriter
- Java.io - Console
- Java.io - DataInputStream
- Java.io - DataOutputStream
- 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.markSupported() Method
Description
The java.io.FilterReader.mark(int readAheadLimit) method tells whether this stream supports the mark() operation.
Declaration
Following is the declaration for java.io.FilterReader.markSupported() method −
public boolean markSupported()
Parameters
NA
Return Value
This method returns true if this stream support the mark operation.
Exception
NA
Example
The following example shows the usage of java.io.FilterReader.markSupported() 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; boolean bool = false; try { // create new reader r = new StringReader("ABCDEF"); // create new filter reader fr = new FilterReader(r) { }; // tests if the filter reader supports mark() bool = fr.markSupported(); // prints System.out.print("If mark() supported? "+bool); } 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 −
If mark() supported? true
java_io_filterreader.htm
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