Java Program to find two letter capital words using Regex

Java Program to find two letter capital words in Java using Regex:

[java gutter=”false”]
import java.util.regex.Matcher;
import java.util.regex.Pattern;

public class RegexAppealAddress {
public static void main(String[] args) {
String input = "Javadomain is also called as JD which contains JAVA tutorials and programmings";
// This prints JD and JA
// Pattern regexPattern = Pattern.compile("\\s[A-Z]{2,2}");
// This prints only JD
Pattern regexPattern = Pattern.compile("\\s[A-Z]{2,2}\\s");
Matcher matcher = regexPattern.matcher(input);
while (matcher.find()) {
System.out.println(matcher.group());
}
}
}
[/java]

Output:
[plain gutter=”false”]
JD
[/plain]

Explanation:
[plain gutter=”false”]
1. \\s for whitespaces
2. [A-Z] for only capital letters
3. {2,2} for minimum two letters and maximum two letters.
[/plain]
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