The ready() method of BufferedReader class in Java is used to verify whether the buffer stream is ready to be read or not. A buffer stream is said to be ready in two cases either the buffer is not empty or the main stream is ready.
Syntax:
public boolean ready()
throws IOException
Overrides: This method overrides ready() method of Reader class.
Parameters: This method does not accept any parameter.
Return value: This method returns true if the stream is ready to be read otherwise it returns false.
Exceptions: This method throws IOException if an I/O error occurs.
Below programs illustrate ready() method in BufferedReader class in IO package:
Program 1: Assume the existence of the file “c:/demo.txt”.
// Java program to illustrate// BufferedReader ready() method import java.io.*; public class GFG { public static void main(String[] args) { // Read the stream 'demo.txt' // containing text "GEEKS" FileReader fileReader = new FileReader( "c:/demo.txt"); // Convert fileReader to // bufferedReader BufferedReader buffReader = new BufferedReader( fileReader); boolean b = buffReader.ready(); System.out.println(b); while (b) { System.out.println( (char)buffReader.read()); b = buffReader.ready(); } System.out.println(b); }} |
Program 2: Assume the existence of the file “c:/demo.txt”.
// Java program to illustrate// BufferedReader ready() method import java.io.*; public class GFG { public static void main(String[] args) { // Read the stream 'demo.txt' // containing text "GEEKSFORGEEKS" FileReader fileReader = new FileReader( "c:/demo.txt"); // Convert fileReader to // bufferedReader BufferedReader buffReader = new BufferedReader( fileReader); boolean b = buffreader.ready(); System.out.println(b); while (b) { System.out.println( (char)buffReader.read()); b = buffReader.ready(); } System.out.println(b); }} |
References: https://docs.oracle.com/javase/10/docs/api/java/io/BufferedReader.html#ready()