Read the bytes from input stream to fill the buffer array size

readBytesFullArraySize.java

package com.example;

import java.io.IOException;
import java.util.Arrays;

class MyTestClass
{

    public static void main(String[] args){
        byte[] bytes = new byte[30];

        try {
            System.out.println("Available bytes :"+System.in.available());
            System.out.print("Write something :");
            int bytesread = System.in.read(bytes);

            System.out.println("I've read :"+bytesread +" bytes from the InputStream");
            System.out.println(Arrays.toString(bytes));

        } catch (IOException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
    }

}