Given the code below what will be the output ?

@FunctionalInterface
interface StringFormatter {
public String format(String s1, String s2);
}

public class TestDemo {

public static void main(String[] args) {
StringFormatter sf1=(s1,s2)->{return (s1+s2);}; // Line 1
evalnput("Lambda ", "Expression",sf1);
StringFormatter sf2=(s1,s2)->{return (s1.toUpperCase())+" "+(s2.toUpperCase());}; // Line 2
evalnput("java", "se8 features",sf2);

}
public static void evalnput(String s1, String s2, StringFormatter sf) {
System.out.println(sf.format(s1, s2));
}
}

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