how can i use unsigned in java

I need convert integer to byte and write byte in file but when i convert a number larger than 128 to byte in convert to a negative number. I need to use unsigne开发者_运维知识库d char but i don't know how. in c++ we write unsigned but how is it in java?

---

Java doesn't have unsigned types by default but you can workaround it, see Java and unsigned int, unsigned short, unsigned byte, unsigned long, etc. (Or rather, the lack thereof)

---

Java doesn't have unsigned types. I suggest you use a short, since it can accommodate all the values available to an unsigned char in languages like C and C++.

You might find this question interesting.

---

Writing bytes is not a problem, it doesn't matter whether you use write(int) or writeByte(byte) since the data written is still the same whether the byte is signed or unsigned. Reading bytes using read() also isn't a problem, because it returns unsigned bytes. Only when you're reading into a byte array do you need to be careful, because then you have to remember to mask each byte with 0xFF when you use it.