StringReader ready() in Java

ready(): This method is available in the java.io.StringReader class of Java.

Syntax:

boolean java.io.StringReader.ready() throws IOException

This method tells whether this stream is ready to be read.

Parameters: NA

Returns: True if the next read() is guaranteed not to block for input.

Throws:

1. IOException - If the stream is closed

Approach 1: When no exception

Java

import java.io.IOException;
import java.io.StringReader;

public class StringReaderready {
    public static void main(String[] args) {

        String s = "HELLO JAVA";
        StringReader stringReader = new StringReader(s);

        try {
            System.out.println(stringReader.ready());
        } catch (IOException e) {
            System.out.println("IOException occurs");
        }
    }
}

Output:

true

Approach 2: IOException

Java

import java.io.IOException;
import java.io.StringReader;

public class StringReaderready {
    public static void main(String[] args) {

        String s = "HELLO JAVA";
        StringReader stringReader = new StringReader(s);

        stringReader.close();
        try {
            System.out.println(stringReader.ready());
        } catch (IOException e) {
            System.out.println("IOException occurs");
        }
    }
}

Output:

IOException occurs

Some other methods of StringReader

close(): This method closes the stream and releases any system resources associated with it.

mark(int): This method marks the present position in the stream. Subsequent calls to reset() will reposition the stream to this point.

markSupported(): This method tells whether this stream supports the mark() operation, which it does.

read(): This method reads a single character.

read(char[], int, int): This method reads characters into a portion of an array.

ready(): This method tells whether this stream is ready to be read.

reset(): This method resets the stream to the most recent mark, or to the beginning of the string if it has never been marked.

skip(long): This method skips the specified number of characters in the stream.

StringReader(String): This method creates a new string reader.