BufferedReader ready() method in Java with Examples
Last Updated :
28 May, 2020
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”.
import java.io.*;
public class GFG {
public static void main(String[] args)
{
FileReader fileReader
= new FileReader(
"c:/demo.txt" );
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);
}
}
|
Output:
Program 2: Assume the existence of the file “c:/demo.txt”.
import java.io.*;
public class GFG {
public static void main(String[] args)
{
FileReader fileReader
= new FileReader(
"c:/demo.txt" );
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);
}
}
|
Output:
References: https://docs.oracle.com/javase/10/docs/api/java/io/BufferedReader.html#ready()
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