Java Base64
In Java, you can encode and decode data in Base64 format using classes provided in the java.util.Base64 package, which was introduced in Java 8. Base64 encoding is commonly used for encoding binary data, such as images or files, into a text-based format that can be safely transmitted as text or used in data storage.
Here are examples of how to perform Base64 encoding and decoding in Java:
Base64 Encoding:
To encode binary data into Base64 format, you can use the Base64.getEncoder() class from the java.util.Base64 package:
import java.util.Base64;
public class Base64EncodingExample {
public static void main(String[] args) {
// Binary data to be encoded
byte[] binaryData = “Hello, Base64!”.getBytes();
// Encode binary data to Base64
byte[] encodedData = Base64.getEncoder().encode(binaryData);
// Convert the encoded data to a string
String base64String = new String(encodedData);
System.out.println("Base64 Encoded String: " + base64String);
}
}
Base64 Decoding:
To decode a Base64-encoded string back to its original binary form, you can use the Base64.getDecoder() class:
import java.util.Base64;
public class Base64DecodingExample {
public static void main(String[] args) {
// Base64-encoded string
String base64String = “SGVsbG8sIEJhc2U2NCEh”;
// Decode the Base64-encoded string to binary data
byte[] decodedData = Base64.getDecoder().decode(base64String);
// Convert the decoded data to a string
String originalString = new String(decodedData);
System.out.println("Decoded String: " + originalString);
}
}
These examples demonstrate how to use the Base64.getEncoder() and Base64.getDecoder() methods to perform Base64 encoding and decoding in Java. You can use these methods to encode and decode data for various purposes, such as data transmission, storing binary data in a text-based format, or working with web APIs that require Base64 encoding.
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