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Copy pathLazyEvalMain1.java
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53 lines (46 loc) · 1.71 KB
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package stream.basic;
import lambda.lambda5.mystream.MyStreamV3;
import java.util.List;
import java.util.stream.Stream;
public class LazyEvalMain1 {
public static void main(String[] args) {
List<Integer> data = List.of(1, 2, 3, 4, 5, 6);
ex1(data);
System.out.println();
ex2(data);
}
private static void ex1(List<Integer> data) {
System.out.println("== MyStreamV3 시작");
List<Integer> result = MyStreamV3.of(data)
.filter(i -> {
boolean isEven = i % 2== 0;
System.out.println("filter() 실행: " + i + "(" + isEven + ")");
return isEven;
})
.map(i -> {
int mapped = i * 10;
System.out.println("map() 실행: " + i + " -> " + mapped);
return mapped;
})
.toList();
System.out.println("result = " + result);
System.out.println("== MyStreamV3 종료");
}
private static void ex2(List<Integer> data) {
System.out.println("=== Stream API 시작 ===");
List<Integer> resut = data.stream()
.filter(i -> {
boolean isEven = i % 2== 0;
System.out.println("filter() 실행: " + i + "(" + isEven + ")");
return isEven;
})
.map(i -> {
int mapped = i * 10;
System.out.println("map() 실행: " + i + " -> " + mapped);
return mapped;
})
.toList();
System.out.println("resut = " + resut);
System.out.println("=== Stream API 종료 ===");
}
}