Java Convert Byte Array to Base64 String

Tags: Java Base64

In this Java tutorial we learn how to use the java.util.Base64 class to encode a byte[] array into Base64 String in Java programming language.

How to convert byte[] array to Base64 String in Java

In Java to convert a byte[] array to Base64 String we can use the Base64.getEncoder().encodeToString() method. 

byte[] byteData = new byte[] {83, 105, 109, 112, 108, 101, 32, 83, 111, 108, 117, 116, 105, 111, 110};
String base64String = Base64.getEncoder().encodeToString(byteData);

The Java example code below to show you how to use the Base64.getEncoder().encodeToString() in a Java program to convert byte[] array to Base64 String.

ByteArrayToBase64StringExample1.java 

import java.util.Base64;

public class ByteArrayToBase64StringExample1 {
    public static void main(String... args) {

        byte[] byteData = new byte[] {83, 105, 109, 112, 108, 101, 32, 83, 111, 108, 117, 116, 105, 111, 110};

        String base64String = Base64.getEncoder().encodeToString(byteData);

        System.out.println("Bytes Data:");
        for(byte b: byteData) {
            System.out.print(b);
        }
        System.out.println("\nBase64 String:");
        System.out.println(base64String);
    }
}
The output as below. 
Bytes Data:
831051091121081013283111108117116105111110
Base64 String:
U2ltcGxlIFNvbHV0aW9u

Happy Coding 😊

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