byte abc[]="204.29.207.217";
This is giving an error. Please, tell me correct the method.
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possible duplicate of [Convert InputStream to byte\[\] in Java](http://stackoverflow.com/questions/1264709/convert-inputstream-to-byte-in-java) – bmargulies Sep 10 '11 at 19:44
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If you're trying to assign hard-coded values, you can use:
byte[] bytes = { (byte) 204, 29, (byte) 207, (byte) 217 };
Note the cast because Java bytes are signed - the cast here will basically force the overflow to a negative value, which is probably what you want.
If you're actually trying to parse a string, you need to do that - split the string into parts and parse each one.
If you're trying to convert a string into its binary representation under some particular encoding, you should use String.getBytes, e.g.
byte[] abc = "204.29.207.217".getBytes("UTF-8");
(Note that conventionally the [] is put as part of the type of the variable, not after the variable name. While the latter is allowed, it's discouraged as a matter of style.)
Jon Skeet
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Will `(byte) 128` result in `-1`? I'm always confused with it. I know it will work in C++ (except we have to use `char` instead of `byte`), but I wasn't sure about Java. – Martijn Courteaux Sep 10 '11 at 11:31
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1@Martijn: No, `(byte) 128` will result in -128. `(byte) 255` will result in -1. – Jon Skeet Sep 10 '11 at 11:44
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1@Martijn `byte` is an 8-bit signed integer in Java, it's range goes from -128 to +127. It's stored in [two's complement](http://en.wikipedia.org/wiki/Two%27s_complement) format. – Jesper Sep 10 '11 at 14:46
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That's a string literal. If you're looking to get the binary representation of the string, use one of the String.getBytes methods.
mre
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