Java.io.LineNumberInputStream Class

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Introduction

The Java.io.LineNumberInputStream class is an input stream filter that provides the added functionality of keeping track of the current line number. A line is a sequence of bytes ending with a carriage return character ('\r'), a newline character ('\n'), or a carriage return character followed immediately by a linefeed character.

Class declaration

Following is the declaration for Java.io.LineNumberInputStream class −

public class LineNumberInputStream
   extends Reader

Field

Following are the fields for Java.io.LineNumberInputStream class −

  • protected InputStream in − This is the input stream to be filtered.

Class constructors

Sr.No. Constructor & Description
1

LineNumberInputStream(InputStream in)

This constructs a newline number input stream that reads its input from the specified input stream.

Class methods

Sr.No. Method & Description
1 int available()

This method returns the number of bytes that can be read from this input stream without blocking.
2 int getLineNumber()

This method returns the current line number.
3 void mark(int readlimit)

This method marks the current position in this input stream.
4 int read()

This method reads the next byte of data from this input stream.
5 int read(byte[] b, int off, int len)

This method reads up to len bytes of data from this input stream into an array of bytes.
6 void reset()

This method repositions this stream to the position at the time the mark method was last called on this input stream.
7 void setLineNumber(int lineNumber)

This method sets the line number to the specified argument.
8 long skip(long n)

This method skips over and discards n bytes of data from this input stream.

Methods inherited

This class inherits methods from the following classes −

  • Java.io.FilterInputStream
  • Java.io.Object
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