Java basics
mark()
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.
Syntax:public void mark(int readlimit)
Example: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();
}
}
}
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