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Java Program to mark the current position in this input stream
The method java.io.InputStream.mark() is used to mark the current position in this input stream. This method requires a single parameter i.e. the bytes that can be read before the position marked is invalidated.
A program that demonstrates this is given as follows −
Example
import java.io.FileInputStream; import java.io.InputStream; public class Demo { public static void main(String[] args) throws Exception { InputStream i = null; try { i = new FileInputStream("C://JavaProgram//data.txt"); System.out.println("Char : "+(char)i.read()); System.out.println("Char : "+(char)i.read()); System.out.println("Char : "+(char)i.read()); i.mark(0); System.out.println("Char : "+(char)i.read()); System.out.println("Char : "+(char)i.read()); if(i.markSupported()){ i.reset(); System.out.println("Char : "+(char)i.read()); System.out.println("Char : "+(char)i.read()); } } catch(Exception e) { e.printStackTrace(); } } }
The output of the above program is as follows −
Output
Char : D Char : A Char : T Char : A
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