JAVA chapter16. 스트림과 병렬처리. 16.1 스트림 소개

JAVA chapter16. 스트림과 병렬처리.

16.1 스트림 소개

16.1.1 반복자 스트림

package sec01.stream_introduction;
 
import java.util.Arrays;
import java.util.Iterator;
import java.util.List;
import java.util.stream.Stream;
 
public class IteratorVsStreamExample {
    public static void main(String[] args) {
        List<String> list = Arrays.asList("홍길동", "신용권", "감자바");
        
        //Iterator 이용
        Iterator<String> iterator = list.iterator();
        while(iterator.hasNext()) {
            String name = iterator.next();
            System.out.println(name);
        }
        
        System.out.println();
        
        //Stream 이용
        Stream<String> stream = list.stream();
        stream.forEach( name -> System.out.println(name) );
    }
}

16.1.2 스트림의 특징

package sec01.stream_introduction;
 
import java.util.Arrays;
import java.util.List;
import java.util.stream.Stream;
 
public class LambdaExpressionsExample {
    public static void main(String[] args) {
        List<Student> list = Arrays.asList(
                new Student("홍길동", 90),
                new Student("신용권", 92)
        );
        
        Stream<Student> stream = list.stream();
        stream.forEach(s -> {
            String name = s.getName();
            int score = s.getScore();
            System.out.println(name + "-" + score);
        });
    }
}