java vs scala

gistfile1.scala

//文字列で構成された配列から、大文字の数をカウントし配列毎に改行して表示する

//Java
import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;

public class Aaa {
	public static void main(String[] args) {
		List<String> list = new ArrayList<String>();
		list.add("AddddsssSSDD");
		list.add("aadDDDDD");
		list.add("tttTTTttTTT");
		Iterator<String> iter = list.iterator();
		while(iter.hasNext()){
			int upperCharCnt = 0;
			String str = iter.next();
			char[] charArray = str.toCharArray();
			for(int charIndex = 0,maxLen = str.length();charIndex < maxLen;charIndex++){
				if(Character.isUpperCase(charArray[charIndex])){
					upperCharCnt++;
				}
			}
			System.out.println(upperCharCnt);
		}
	}
}
結果
5
5
6


//scala
object Test extends App {
  List("AddddsssSSDD","aadDDDDD","tttTTTttTTT").map(_.count(_.isUpper)).foreach(println)
}

結果：
5
5
6

oneline.java

//oneline対決

//oneline java
import java.util.*;public class Aaa {public static void main(String[] args) {Iterator<String> iter = Arrays.asList("AddddsssSSDD", "aadDDDDD","tttTTTttTTT").iterator();while (iter.hasNext()) System.out.println(iter.next().replaceAll("[^A-Z]", "").length());}}

//oneline scala
object Test extends App {List("AddddsssSSDD","aadDDDDD","tttTTTttTTT").map(_.count(_.isUpper)).foreach(println}}

scalaは1行でも読みやすいね