- 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.StringReader.mark() Method
Description
The java.io.StringReader.mark(int readAheadLimit) method marks the present position in the stream. Subsequent calls to reset() will reposition the stream to this point.
Declaration
Following is the declaration for java.io.StringReader.mark() method.
public void mark(int readAheadLimit)
Parameters
readAheadLimit − Limit on the number of characters that may be read while still preserving the mark. Because the stream's input comes from a string, there is no actual limit, so this argument must not be negative, but is otherwise ignored.
Return Value
This method does not return a value.
Exception
IllegalArgumentException − If readAheadLimit is < 0.
IOException − If an I/O error occurs.
Example
The following example shows the usage of java.io.StringReader.mark() method.
package com.tutorialspoint; import java.io.*; public class StringReaderDemo { public static void main(String[] args) { String s = "Hello World"; // create a new StringReader StringReader sr = new StringReader(s); try { // read the first five chars for (int i = 0; i < 5; i++) { char c = (char) sr.read(); System.out.print("" + c); } // mark the reader at position 5 for maximum 6 sr.mark(6); // read the next six chars for (int i = 0; i < 6; i++) { char c = (char) sr.read(); System.out.print("" + c); } // reset back to marked position sr.reset(); // read again the next six chars for (int i = 0; i < 6; i++) { char c = (char) sr.read(); System.out.print("" + c); } // close the stream sr.close(); } catch (IOException ex) { ex.printStackTrace(); } } }
Let us compile and run the above program, this will produce the following result −
Hello World World