Groovy & Java Regex Match and Find

Groovy provides some operators to have an efficient way to create pattern, find or test regex compared with Java.

Here are some common use case in Groovy and Java,

In Groovy,

Groovy

Pattern pattern = ~/regex/

With Java,

Java

Pattern pattern = Pattern.compile(regex)

In Groovy,

Groovy

Matcher matcher = "string" =~ /regex/
if (matcher.find()) {
    def str = matcher.group(1)
}

With Java,

Java

Pattern pattern = Pattern.compile("pattern");
Matcher matcher = pattern.matcher("string");
if (matcher.find()) {
    var str = matcher.group(1);
}

* test with Regex

In Groovy,

Groovy

def match = "string" ==~ /regex/

With Java,

Java

var match = "string".matches("regex");

or

Java

var match = Pattern.matches("regex", "string");