How can I convert a string to byte? For example, Byte.parseByte("255"); causes NumberFormatException since (for some weird reason) byte is signed in java so the maximum value it can have is 127.
So I need a function such that
public static byte toByte(String input) {
...
}
And for example toByte("255"); should return -1(ie bits: 11111111)
Something like implementation of 2s complement
Use Integer.parseInt("255") and cast the resulting int to a byte:
byte value = (byte)Integer.parseInt("255");
byte value = (byte)Integer.parseInt("255");
public static void main(String[] args) {
String s = "65";
byte b = Byte.valueOf(s);
System.out.println(b);
// Causes a NumberFormatException since the value is out of range
System.out.println(Byte.valueOf("129"));
}
I am thinking of the following implementation!
public static byte toByte(String input) {
Integer value = new Integer(input);
// Can be removed if no range checking needed.
// Modify if different range need to be checked.
if (value > 255 || value < 0)
throw new NumberFormatException("Invalid number");
return value.byteValue();
}
short