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