The size() method of ByteArrayOutputStream class in Java is used to obtain the current size of the buffer. This buffer is accumulated inside the ByteArrayOutputStream. This method returns the size of the current buffer as an integer type.
Syntax:
public int size()
Parameters: This method does not accept any parameter.
Return value: This method returns the size of the current buffer as an integer.
Exceptions: This method does not throw any exception.
Below programs illustrate size() method in ByteArrayOutputStream class in IO package:
Program 1:
// Java program to illustrate// ByteArrayOutputStream size() method  import java.io.*;  public class GFG {    public static void main(String[] args)        throws Exception    {          // Create byteArrayOutputStream        ByteArrayOutputStream byteArrayOutStr            = new ByteArrayOutputStream();          // Create byte array        byte[] buf = { 71, 69, 69, 75, 83 };          for (byte b : buf) {            // Write byte            // to byteArrayOutputStream            byteArrayOutStr.write(b);              // Print the byteArrayOutputStream            // as String and size as integer            System.out.println(                byteArrayOutStr.toString() + " "                + byteArrayOutStr.size());        }    }} |
Output:
G 1 GE 2 GEE 3 GEEK 4 GEEKS 5
Program 2:
// Java program to illustrate// ByteArrayOutputStream size() method  import java.io.*;  public class GFG {    public static void main(String[] args)        throws Exception    {          // Create byteArrayOutputStream        ByteArrayOutputStream byteArrayOutStr            = new ByteArrayOutputStream();          // Create byte array        byte[] buf = { 71, 69, 69, 75, 83,                       70, 79, 82, 71, 69,                       69, 75, 83 };          for (byte b : buf) {            // Write byte            // to byteArrayOutputStream            byteArrayOutStr.write(b);              // Convert byteArrayOutputStream            // into String            String s                = byteArrayOutStr.toString();              int buffsize                = byteArrayOutStr.size();              // Print string and size            System.out.println(                s + " " + buffsize);        }    }} |
Output:
G 1 GE 2 GEE 3 GEEK 4 GEEKS 5 GEEKSF 6 GEEKSFO 7 GEEKSFOR 8 GEEKSFORG 9 GEEKSFORGE 10 GEEKSFORGEE 11 GEEKSFORGEEK 12 GEEKSFORGEEKS 13
References:
https://docs.oracle.com/javase/10/docs/api/java/io/ByteArrayOutputStream.html#size()
