BufferedReader ready() method in Java with Examples ❤️

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 "Beginner" 
        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); 
    } 
} 

Input:

Output:

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 "w3wiki" 
        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); 
    } 
} 

Input:

Output:

References: https://docs.oracle.com/javase/10/docs/api/java/io/BufferedReader.html#ready()

BufferedReader ready() method in Java with Examples

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