[Java]Stream 활용 : List<DTO> -> List<String>

DTO를 타입으로 갖는 리스트에서 String 타입의 리스트로 변환하는 예제입니다.

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CoffeeDTO.java

package com.java.dto;

public class CoffeeDTO {
	 
	private String name;
	private int price;
	
	public String getName() {
		return name;
	}

	public void setName(String name) {
		this.name = name;
	}

	public int getPrice() {
		return price;
	}

	public void setPrice(int price) {
		this.price = price;
	}

	public CoffeeDTO(String name, int price) {
		this.name = name;
		this.price = price;
	}
}

 

MyMap.java

package com.java.stream;

import java.util.Arrays;
import java.util.List;
import java.util.stream.Collectors;

import com.java.dto.CoffeeDTO;

public class MyMap {

	public static void listToString() {
		List<CoffeeDTO> menuList = Arrays.asList(
                new CoffeeDTO("아메리카노", 5000),
                new CoffeeDTO("카페라떼", 6000),
                new CoffeeDTO("바닐라라떼", 6500)                
        );
		
		List<String> result = menuList.stream()
        								.map(CoffeeDTO::getName)
        								.collect(Collectors.toList());
        
		System.out.println(result);
	}
	
	public static void main(String[] args) {
		listToString();
	} 
	
}

결과