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javaunicodenon-printing-characters

printable char in java

Does anyone knows how to detect printable characters in java?

After a while ( trial/error ) I get to this method:

    public boolean isPrintableChar( char c ) {
        Character.UnicodeBlock block = Character.UnicodeBlock.of( c );
        return (!Character.isISOControl(c)) &&
                c != KeyEvent.CHAR_UNDEFINED &&
                block != null &&
                block != Character.UnicodeBlock.SPECIALS;
    }

I'm getting the input via KeyListener and come Ctr-'key' printed an square. With this function seems fairly enough.

Am I missing some char here?

Solution

  • It seems this was the "Font" independent way.

    public boolean isPrintableChar( char c ) {
    Character.UnicodeBlock block = Character.UnicodeBlock.of( c );
    return (!Character.isISOControl(c)) &&
            c != KeyEvent.CHAR_UNDEFINED &&
            block != null &&
            block != Character.UnicodeBlock.SPECIALS;
}