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Is it safe to use String.getBytes() ? What happens when a program runs on different systems with different default charset? I suppose I can get different content byte[]? Is it possible to define preferred charset in Java 1.4?
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The Java String getBytes() method encodes the string into a sequence of bytes and stores it in a byte array. Here, string is an object of the String class. The getBytes() method returns a byte array.
The method getBytes() encodes a String into a byte array using the platform's default charset if no argument is passed. We can pass a specific Charset to be used in the encoding process, either as a String object or a String object.
The native character encoding of the Java programming language is UTF-16. A charset in the Java platform therefore defines a mapping between sequences of sixteen-bit UTF-16 code units (that is, sequences of chars) and sequences of bytes.
To convert a string to byte array in Kotlin, use String. toByteArray() method. String. toByteArray() method returns a Byte Array created using the characters of the calling string.
Is it safe to use String.getBytes() ?
No. You should always use the overload which specifies the charset; ideally using UTF-8 everywhere. If you were using a modern version of Java, your code could use StandardCharsets for Good Clean Living.
What will happens when program will run on different systems with different default charset?
Your code risks interpreting character data with the wrong encoding, resulting in broken/incorrect strings (for example: "î", "ÃÂ", "ü") and/or replacement characters (�).
Is it possible to define preferred charset in java 1.4?
No. The platform-default is, by definition, dictated by the platform, not your app.
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JavaDoc for getBytes():
Encodes this String into a sequence of bytes using the platform's default charset, storing the result into a new byte array.
Like MattBall said, it's best to define the charset each time using getBytes(Charset charset).
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