<div id="readability-page-1" class="page"><div><div><a rel="noopener" href="/@sindepal?source=post_page-----e9d5caf5412f--------------------------------"><img alt="신상훈" src="https://miro.medium.com/fit/c/56/56/0*IyUJXQViJJEmVWaW.jpg" width="28" height="28"></a></div><h2 id="15ba">allMatch noneMatch anyMatch</h2><pre>package stream;import java.util.Arrays;import java.util.Comparator;import java.util.List;import java.util.function.Predicate;import java.util.stream.Collectors;class Course {private String name;private String category;private int reviewScore;private int noOfStudents;public Course(String name, String category, int reviewScore, int noOfStudents) {super();this.name = name;this.category = category;this.reviewScore = reviewScore;this.noOfStudents = noOfStudents;}public String getName() {return name;}public void setName(String name) {this.name = name;}public String getCategory() {return category;}public void setCategory(String category) {this.category = category;}public int getReviewScore() {return reviewScore;}public void setReviewScore(int reviewScore) {this.reviewScore = reviewScore;}public int getNoFoStudents() {return noOfStudents;}public void setNoOfStudents(int noFoStudents) {this.noOfStudents = noFoStudents;}@Overridepublic String toString() {return "Course [name=" + name + ", category=" + category + ", reviewScore=" + reviewScore + ", noFoStudents="+ noOfStudents + "]";}}public class FP04CustomClass {private static void println(String str) {System.out.println(str);}public static void main(String[] args) {List&lt;Course&gt; courses = Arrays.asList(new Course("Spring", "Freamework",99,25500),new Course("Spring Boot", "Freamework",67,26600),new Course("API", "Microservice",98,27700),new Course("Shin", "Name",78,20000),new Course("Kim", "Name",89,20990),new Course("RectJs", "Freamework",91,20000),new Course("Angular", "Freamework",75,20550),new Course("MariaDB", "Database",100,20044),new Course("MsSQL", "Database",94,20088),new Course("Oracle", "Database",83,23000),new Course("Lambda", "AWS",100,20033),new Course("EC2", "AWS",91,21220),new Course("CDk", "AWS",90,20110));courses.stream().allMatch(course-&gt; course.getReviewScore() &gt; 95);Predicate&lt;Course&gt; reviewScoreGreaterThan95Predicate = course -&gt; course.getReviewScore() &gt; 90;Predicate&lt;Course&gt; reviewScoreGreaterThan90Predicate = course -&gt; course.getReviewScore() &gt; 90;Predicate&lt;Course&gt; reviewScoreLessThan90Predicate = course -&gt; course.getReviewScore() &lt; 90;// allMatch() 모든 요소들이 매개값으로 주어진 조건을 만족하는지.System.out.println(courses.stream().allMatch(reviewScoreGreaterThan95Predicate));;// noneMatch() 모든 요소들이 주어진 조건을 만족하지 않는지.System.out.println(courses.stream().noneMatch(reviewScoreGreaterThan90Predicate));// anyMatch() 최소한 한 개의 요소가 주어진 조건에 만족하는지.System.out.println(courses.stream().anyMatch(reviewScoreLessThan90Predicate));// anyMatch() 최소한 한 개의 요소가 주어진 조건에 만족하는지.System.out.println(courses.stream().anyMatch(reviewScoreGreaterThan90Predicate));Comparator&lt;Course&gt; comparatingByNoOfStudentsIncreasing = Comparator.comparing(Course::getNoFoStudents);System.out.println(courses.stream().sorted(comparatingByNoOfStudentsIncreasing).collect(Collectors.toList()));}}</pre></div></div>

Stories by 신상훈 on Medium

allMatch noneMatch anyMatch
package stream;
import java.util.Arrays;
import java.util.Comparator;
import java.util.List;
import java.util.function.Predicate;
import java.util.stream.Collectors;
class Course {
private String name;
private String category;
private int reviewScore;
private int noOfStudents;
public Course(String name, String category, int reviewScore, int noOfStudents) {
super();
this.name = name;
this.category = category;
this.reviewScore = reviewScore;
this.noOfStudents = noOfStudents;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public String getCategory() {
return category;
}
public void setCategory(String category) {
this.category = category;
}
public int getReviewScore() {
return reviewScore;
}
public void setReviewScore(int reviewScore) {
this.reviewScore = reviewScore;
}
public int getNoFoStudents() {
return noOfStudents;
}
public void setNoOfStudents(int noFoStudents) {
this.noOfStudents = noFoStudents;
}
@Override
public String toString() {
return "Course [name=" + name + ", category=" + category + ", reviewScore=" + reviewScore + ", noFoStudents="
+ noOfStudents + "]";
}
}
public class FP04CustomClass {
private static void println(String str) {
System.out.println(str);
}
public static void main(String[] args) {
List<Course> courses = Arrays.asList(
new Course("Spring", "Freamework",99,25500),
new Course("Spring Boot", "Freamework",67,26600),
new Course("API", "Microservice",98,27700),
new Course("Shin", "Name",78,20000),
new Course("Kim", "Name",89,20990),
new Course("RectJs", "Freamework",91,20000),
new Course("Angular", "Freamework",75,20550),
new Course("MariaDB", "Database",100,20044),
new Course("MsSQL", "Database",94,20088),
new Course("Oracle", "Database",83,23000),
new Course("Lambda", "AWS",100,20033),
new Course("EC2", "AWS",91,21220),
new Course("CDk", "AWS",90,20110)
);
courses.stream().allMatch(course-> course.getReviewScore() > 95);
Predicate<Course> reviewScoreGreaterThan95Predicate = course -> course.getReviewScore() > 90;
Predicate<Course> reviewScoreGreaterThan90Predicate = course -> course.getReviewScore() > 90;
Predicate<Course> reviewScoreLessThan90Predicate = course -> course.getReviewScore() < 90;
// allMatch() 모든 요소들이 매개값으로 주어진 조건을 만족하는지.
System.out.println(courses.stream().allMatch(reviewScoreGreaterThan95Predicate));;
// noneMatch() 모든 요소들이 주어진 조건을 만족하지 않는지.
System.out.println(courses.stream().noneMatch(reviewScoreGreaterThan90Predicate));
// anyMatch() 최소한 한 개의 요소가 주어진 조건에 만족하는지.
System.out.println(courses.stream().anyMatch(reviewScoreLessThan90Predicate));
// anyMatch() 최소한 한 개의 요소가 주어진 조건에 만족하는지.
System.out.println(courses.stream().anyMatch(reviewScoreGreaterThan90Predicate));
Comparator<Course> comparatingByNoOfStudentsIncreasing = Comparator.comparing(Course::getNoFoStudents);
System.out.println(
courses.stream().sorted(comparatingByNoOfStudentsIncreasing).collect(Collectors.toList())
);
}
}

Java Stream -Step 04 allMatch noneMatch anyMatch

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