Java ByteArrayOutputStream size() method

The size() method of Java ByteArrayOutput class returns the current size of buffer.

Syntax:

Returns

The size() method returns the value of the count field which is the number of valid bytes in this output stream.

Example 1

import java.io.ByteArrayOutputStream;
import java.io.IOException;
public class JavaByteArrayOutputStreamSizeExample1 {
    public static void main(String[] args) throws IOException {
        int size = 0;
        byte[] s = {86, 87, 88, 89, 90};
        ByteArrayOutputStream baos = new ByteArrayOutputStream();
        for (byte b : s) {
            baos.write(b);
            String str = baos.toString();
            size = baos.size();
            System.out.print(size + ":");
            System.out.println(str);
        }
    }
}

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Output:

1:V
2:VW
3:VWX
4:VWXY
5:VWXYZ

Example 2

import java.io.ByteArrayOutputStream;
import java.io.IOException;
public class JavaByteArrayOutputStreamSizeExample2 {
    public static void main(String[] args) throws IOException {
        int size = 0;
        byte[] s = { 71, 72, 73, 74 };
        ByteArrayOutputStream baos = new ByteArrayOutputStream();
        for (byte b : s) {
            baos.write(b);
            String str = baos.toString();
            size = baos.size();
            System.out.print(size + ":");
            System.out.println(str);
        }
    }
}

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Output: