- Java.io package classes
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- Java.io - BufferedInputStream
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- Java.io - FileInputStream
- Java.io - FileOutputStream
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- Java.io - FilterOutputStream
- Java.io - FilterReader
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- 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.InputStream.mark() Method
Description
The java.io.InputStream.mark(int readlimit) method marks the current position in this input stream. A subsequent invocation to the reset() method reposition the stream to the recently marked position.
Declaration
Following is the declaration for java.io.InputStream.mark(int readlimit) method −
public void mark(int readlimit)
Parameters
readlimit − The maximum number of bytes that can be read before the mark position becomes invalid.
Return Value
The method does not return any value.
Exception
NA
Example
The following example shows the usage of java.io.InputStream.mark(int readlimit) method.
package com.tutorialspoint; import java.io.FileInputStream; import java.io.InputStream; public class InputStreamDemo { public static void main(String[] args) throws Exception { InputStream is = null; try { // new input stream created is = new FileInputStream("C://test.txt"); // read and print characters one by one System.out.println("Char : "+(char)is.read()); System.out.println("Char : "+(char)is.read()); System.out.println("Char : "+(char)is.read()); // mark is set on the input stream is.mark(0); System.out.println("Char : "+(char)is.read()); System.out.println("Char : "+(char)is.read()); if(is.markSupported()) { // reset invoked if mark() is supported is.reset(); System.out.println("Char : "+(char)is.read()); System.out.println("Char : "+(char)is.read()); } } catch(Exception e) { // if any I/O error occurs e.printStackTrace(); } finally { // releases system resources associated with this stream if(is!=null) is.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 −
ABCDEF
Let us compile and run the above program, this will produce the following result −
Char : A Char : B Char : C Char : D Char : E
java_io_inputstream.htm
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