How Do I Convert Strings and Byte Arrays Using Different Encodings in Java?

Converting Strings and Byte Arrays with Encodings

In Java, strings can be encoded into byte arrays, and byte arrays can be decoded into strings using different encodings.

Encoding a String into a Byte Array

To encode a string into a byte array using UTF-8 encoding:

String s = "my string";
byte[] b = s.getBytes(StandardCharsets.UTF_8);

Other commonly used encodings include US-ASCII:

byte[] b = s.getBytes(StandardCharsets.US_ASCII);

Decoding a Byte Array into a String

To decode a byte array into a string using UTF-8 decoding:

byte[] b = {(byte) 99, (byte) 97, (byte) 116};
String s = new String(b, StandardCharsets.UTF_8);

Similarly, for US-ASCII decoding:

String s = new String(b, StandardCharsets.US_ASCII);

Remember to use the appropriate encoding name for your specific use case. By leveraging these encoding methods, you can seamlessly convert between string and byte array representations with different character encodings.

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