In this example we shall show you how to read a line of chars from console with an InputStream. This abstract class is the superclass of all classes representing an input stream of bytes. Applications that need to define a subclass of InputStream must always provide a method that returns the next byte of input. To read a line of chars from console with an InputStream one should perform the following steps:
- Use System.in to get the standard InputStream.
- Create a new BufferedReader with a new InputStreamReader with the specified InputStream.
- Use
readLine()API method of BufferedReader to read a line of text. - Close the BufferedReader, using the
close()API method,
as described in the code snippet below.
01 02 03 04 05 06 07 08 09 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 | package com.javacodegeeks.snippets.core;import java.io.BufferedReader;import java.io.IOException;import java.io.InputStream;import java.io.InputStreamReader;public class ReadLineOfCharsFromConsoleWithInputStream { public static void main(String[] args) { InputStream is = null; BufferedReader br = null; try { is = System.in; br = new BufferedReader(new InputStreamReader(is)); String line = null; while ((line = br.readLine()) != null) { if (line.equalsIgnoreCase("quit")) { break; } System.out.println("Line entered : " + line); } } catch (IOException ioe) { System.out.println("Exception while reading input " + ioe); } finally { // close the streams using close method try { if (br != null) { br.close(); } } catch (IOException ioe) { System.out.println("Error while closing stream: " + ioe); } } }} |
This was an example of how to read a line of chars from console with an InputStream in Java.
