I need to mask certain string values read from a database by setting a specific bit in an int value for each possible database value. For example, if the database returns the string "value1" then the bit in position 0 will need to be set to 1, but if the database returns "value2" then the bit in position 1 will need to be set to 1 instead.
How can I ensure each bit of an int is set to 0 originally and then turn on just the specified bit?
If you have an int value "intValue" and you want to set a specific bit at position "bitPosition", do something like:
intValue = intValue | (1 << bitPosition);
or shorter:
intValue |= 1 << bitPosition;
If you want to reset a bit (i.e, set it to zero), you can do this:
intValue &= ~(1 << bitPosition);
(The operator ~ reverses each bit in a value, thus ~(1 << bitPosition) will result in an int where every bit is 1 except the bit at the given bitPosition.)
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