How to check if a character is correct

Question

I have a bunch of characters and want to remove everything that isn\'t a \'#\' \'.\' \'E\' and \'G\'.

I tried to use this:

if (buffer.get(buffertest) ==          


        

Answer 1

You need to compare for each character individually. Assuming that buffer.get(buffertest) returns a char, here's how to do it:

char c = buffer.get(buffertest);
if (c == 'G' || c == 'E' || c == '#' || c == '.') {
    // do something
}

Alternatively, you could do something like this:

char c = buffer.get(buffertest);
if ("GE#.".contains(Character.toString(c))) {
    // do something
}