import java.util.*;
import java.lang.*;
import java.io.*;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
class Ideone
{
{
String regex
= "^https?://\\S+\\.mp3$"; "https://w...content-available-to-author-only...x.com/examples/mp3/SoundHelix-Song-1.mp3",
"https://w...content-available-to-author-only...x.com/examples/mp3/SoundHelix-Song-1.mp4"
};
Pattern pattern = Pattern.compile(regex);
Matcher matcher = pattern.matcher(s);
if (matcher.find()) {
System.
out.
println(matcher.
group(0)); }
}
}
}
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