PipedReader PipedReader(int) in Java

PipedReader(int): This method is available in the java.io.PipedReader class of Java.

Syntax:

java.io.PipedReader.PipedReader(int pipeSize)

This method takes one argument. This method creates a PipedReader so that it is not yet connected and uses a specified pipe size for the pipe's buffer.

It must be connected to a PipedWriter before being used.

Parameters: One parameter is required for this method.

pipeSize: the size of the pipe's buffer.

Throws:

IllegalArgumentException - if pipeSize <= 0.

Approach 1: When no exception

Java

import java.io.IOException;
import java.io.PipedReader;

public class PipedReaderPipedReader2 {
    public static void main(String[] args) throws IOException {

        int pipeSize = 100;
        PipedReader pipedReader = new PipedReader(pipeSize);

        System.out.println(pipedReader);

        pipedReader.close();

    }
}

Output:

java.io.PipedReader@53bd815b

Approach 2: IllegalArgumentException

Java

package com.PipedReader;

import java.io.IOException;
import java.io.PipedReader;

public class PipedReaderPipedReader2 {
    public static void main(String[] args) throws IOException {

        int pipeSize = 0;
        PipedReader pipedReader = new PipedReader(pipeSize);

        System.out.println(pipedReader);

        pipedReader.close();

    }
}

Output:

Exception in thread "main" java.lang.IllegalArgumentException: Pipe size <= 0
	at java.base/java.io.PipedReader.initPipe(PipedReader.java:132)
	at java.base/java.io.PipedReader.<init>(PipedReader.java:127)
	at com.PipedReader.PipedReaderPipedReader2.main(PipedReaderPipedReader2.java:10)

Some other methods of PipedReader

close(): This method Closes this piped stream and releases any system resources associated with the stream.

connect(PipedWriter): This method causes this piped reader to be connected to the piped writer src.

PipedReader(): This method creates a PipedReader so that it is not yet connected. It must be connected to a PipedWriter before being used.

PipedReader(int):  This method creates a PipedReader so that it is not yet connected and uses a specified pipe size for the pipe's buffer.

PipedReader(PipedWriter): This method creates a PipedReader so that it is connected to the piped writer src.

PipedReader(PipedWriter, int): This method creates a PipedReader so that it is connected to the piped writer src and uses the specified pipe size for the pipe's buffer.

read(): This method reads the next character of data from this piped stream.

read(char[], int, int): This method reads up to len characters of data from this piped stream into an array of characters.

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