I want to find particular string in JAVA and I am using CONTAINS function for that.
But problem with CONTAINS is that it gives true even if there is a super string available for that string.
Ex- let's say
String i = "anand > 5 or id < 6"
and I want to check whether string contains AND or OR. But here i.contains("and") will give true because of anand.
How to solve this issue?
Is there any function available in library?
if (i.matches("(?s).*\\b(and|or)\\b.*")) System.println("AND or OR found");
(?s) let . also match newlines
\\b is a word boundary
In answer to comment "hey now I wanted..."
String[] words = ...;
StringBuilder expr = new StringBuilder();
for (String word : words) {
if (expr.length() != 0)
expr.append("|"):
expr.append(word);
}
i = i.replaceAll("\\b(" + expr + ")\\b", "bla");
You might want to take a look at regular expressions and use the following regex:
"\\band\\b"
The \\b should denote the regex to match whole words only.
You want to check whether your string contains AND or OR then it is wrong to check i.contains("and") you should use contains method with case sensitive. to check whether string contains AND you need to write contains("AND")
String i = "anand > 5 or id < 6";
System.out.println(i.contains("AND"));//returns false
System.out.println(i.contains("and"));//returns true
because the string contains and not AND it is case sensitive
looks like you want to check for " AND " (with spaces) instead of just "and"
strictly? If you want it to be so strict, use the equals method! light_303's method of checking for ` AND ` will work and WON'T give true for strings like ANAND.
I would do like this : - fist upper case the sting you are searching for (to avoid or/OR and/AND issues) - search for " and " (ie with leading and trailing space)
Looks you want regular expressions where you surround the word you are looking for with word breaks, i.e.
"\\bAND\\b"
This will match AND only when it is not surrounded by other letters.
You want whole word search. It could be done with regexps:
i.matches("\\band\\b")
where \b stands for word boundary
