package questions.section2;
import java.util.Arrays;
import java.util.List;
import java.util.function.Function;
public class S204LambdaInsteadOfAnonClass {
public S204LambdaInsteadOfAnonClass() {
rewriteByLambda();
}
// 2-4 Lambda 式で書きかえてみましょう
private void rewriteByLambda() {
Function<String, Integer> function = new Function<String, Integer>() {
@Override
public Integer apply(String word) {
return word.length();
}
};
List<String> words = Arrays.asList("one thing was certain that the white kitten had had nothing to do with it".split(" "));
double average = 0.0;
for (String word: words) {
average += function.apply(word);
}
average /= words.size();
System.out.println("Average: " + average);
}
public static void main(String... args) {
new S204LambdaInsteadOfAnonClass();
}
}