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- Java.io - LineNumberInputStream
- Java.io - LineNumberReader
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- Java.io package Useful Resources
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Java.io.LineNumberInputStream. getLineNumber() Method
Description
The java.io.LineNumberInputStream.getLineNumber() method returns the current line number.
Declaration
Following is the declaration for java.io.LineNumberInputStream.getLineNumber() method −
public int getLineNumber()
Parameters
NA
Return Value
The method returns the current line number.
Exception
NA
Example
The following example shows the usage of java.io.LineNumberInputStream.getLineNumber() method.
package com.tutorialspoint; import java.io.FileInputStream; import java.io.IOException; import java.io.LineNumberInputStream; public class LineNumberInputStreamDemo { public static void main(String[] args) throws IOException { LineNumberInputStream lnis = null; FileInputStream fis = null; int i,j; char c; try { // create new input streams fis = new FileInputStream("C:/test.txt"); lnis = new LineNumberInputStream(fis); // reads till the end of the stream while((i = lnis.read())!=-1) { // converts int to char c = (char)i; // if the character is not new line if(i!=10) { // prints char System.out.print("Character read: "+c); // get the line number j = lnis.getLineNumber(); System.out.println(" at line: "+j); } } } catch(Exception e) { // if any error occurs e.printStackTrace(); } finally { // closes the stream and releases any system resources if(fis!=null) fis.close(); if(lnis!=null) lnis.close(); } } }
Assuming we have a text file c:/test.txt, which has the following content. This file will be used as an input for our example program −
ABCDE
Let us compile and run the above program, this will produce the following result −
Character read: A at line: 0 Character read: B at line: 0 Character read: C at line: 0 Character read: D at line: 0 Character read: E at line: 0 Character read: F at line: 1 Character read: G at line: 1 Character read: H at line: 1 Character read: I at line: 1 Character read: J at line: 1 Character read: K at line: 2 Character read: L at line: 2 Character read: M at line: 2 Character read: N at line: 2 Character read: O at line: 2 Character read: P at line: 3 Character read: Q at line: 3 Character read: R at line: 3 Character read: S at line: 3 Character read: T at line: 3
java_io_linenumberinputstream.htm
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