I have an app that has a paragraph(s) passed in, and I need to figure out how many sentences it has.

Right now, this is how I'm doing it:
Code:
	private long getSentenceCount(String text){
		String delim = "@@@@";
		String delim2 = "####";
		String tempText = text.replace(". ", delim);
		tempText = tempText.replace(".\r\n", delim);
		tempText = tempText.replace("! ", delim);
		tempText = tempText.replace("!\r\n", delim);
		tempText = tempText.replace("? ", delim);
		tempText = tempText.replace("?\r\n", delim);
		tempText = tempText.replace("\r\n", delim2);
		
		String [] sentences = tempText.split(delim);
		long sCnt = 0;
		for(String s : sentences){
			if(s.contains(delim2)){
				String[] temp = s.split(delim2);
				for(String t : temp){
					if(textIsSentence(t) == true){ //textIsSentence checks that the string is not empty, that there are more than 4 words (arbitrary number for now) and the first letter is uppercasee
						sCnt ++;
					}
				}
			}else{
				if(textIsSentence(s) == true){
					sCnt ++;
				}
			}
		}		
		return sCnt;
	}
I'm wondering if there is a better way to do this. With regex prehaps. But I'm having trouble figuring out how to write the pattern.

What it needs to find is:
period, question mark or exclamation point, followed by either a space or a new line. Or just a new line.

Thanks