/* package whatever; // don't place package name! */
import java.lang.*;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
/* Name of the class has to be "Main" only if the class is public. */
class Ideone
{
{
final String regex
= "(?<=//)\\d+:\\d+:\\w+(?=(/|$))"; final Pattern pattern = Pattern.compile(regex);
final Matcher matcher = pattern.matcher("//16642:4497:F2000018D562F2A412B4/");
if (matcher.find()) {
subMatch = matcher.group();
} else {
subMatch = null;
}
}
}
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