Java String Manipulation ReplaceAll

Question

I am new to java but not programming in general. I've been trying to understand Java String replaceAll...specifically I am reading in Strings from a text file...an example would be "I JUMP UP HIGH IN THE AIR TO GET TO YOU."

1) I want to change "I" to "A" where I is not the beginning of a word, and 2) U to "O" where U is at the end of a word. Any help would be appreciated. (Also, if you can point me to a good tutorial on the topic [I learn best by looking at examples] that would be appreciated)

regular-expressions.info/tutorial.html

shmosel
– shmosel

2016-03-07 03:20:19 +00:00
Commented Mar 7, 2016 at 3:20 — shmosel
– shmosel, Commented Mar 7, 2016 at 3:20

user4910279 · Accepted Answer · 2016-03-07 03:47:41Z

1

Try this.

String s = "I JUMP UP HIGH IN THE AIR TO GET TO YOU.";
s = s.replaceAll("(?!\\b)I", "A")
     .replaceAll("U\\b", "O");
System.out.println(s);
// -> I JUMP UP HAGH IN THE AAR TO GET TO YOO.

answered Mar 7, 2016 at 3:47

user4910279

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2 Comments

Hedgebox Over a year ago

Thank you so much...This was perfect. I have 2 more questions...How would I do a conditional replaceAll...i.e. replace all "P" at end of word unless "UP"...I looked at the tutorial shmosel provided the link to...but I didn't get it...I could really use a tutorial that shows examples if you know of one please provide the link to it....

Hedgebox Over a year ago

This what I tried based on your example for "U" at the end of the word.....s = s.replaceAll("(!UP)P\\b", "PS")

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