Java-8-practices

/******************************************************************************

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******************************************************************************/ import java.util.; public class Main { // public static void main(String[] args) {

// System.out.println("Hello World"); // List Number = List.of(1,50,7,9,0,99,87,100,20); // List Courses = List.of("Spring","Spring Boot","Api","Microservices","AWS","PCP","Azure","Docker","Kubernetes");

// for(Integer i: Number){ // System.out.println(i+" "); // }

// System.out.println("-------------printAllNumbers---------------"); // printAllNumbers(Number); // System.out.println("-------------printEvenNumbers---------------"); // printEvenNumbers(Number); // System.out.println("-------------printOddNumbers--------------"); // printOddNumbers(Number); // System.out.println("-------------printAllCourses------------------"); // printAllCourses(Courses); // System.out.println("-------------Contains Spring------------------"); // printAllCoursesContainsSpring(Courses);

// System.out.println("-------------print Courses whose length is greater than 4------------------"); // printAllCoursesLenthGreaterThan4(Courses);

// System.out.println("-------------Squares of Each Number------------------"); // printSquaresofAllNumbers(Number);

// } // public static void printAllNumbers(List Number){ // Number.stream().forEach(System.out::println); // } // public static void printEvenNumbers(List Number){ // Number.stream().filter(i->i%2==0).forEach(System.out::println); // } // public static void printOddNumbers(List Number){ // Number.stream().filter(i->i%2!=0).forEach(System.out::println); // } // public static void printAllCourses(List Courses){ // Courses.stream().forEach(System.out::println); // } // public static void printAllCoursesContainsSpring(List Courses){ // Courses.stream().filter(i->i.contains("Spring")).forEach(System.out::println); // }

// public static void printAllCoursesLenthGreaterThan4(List Courses){ // Courses.stream().filter(i->i.length()>4).forEach(System.out::println); // } // public static void printSquaresofAllNumbers(List Number){ // Number.stream().map(num->num*num).forEach(System.out::println);

// Playing with Streams

public static void main(String[] args) {

    List<Integer> Number = List.of(1,50,7,9,0,99,87,100,20);
    System.out.println(addListStructured(Number));
    System.out.println(addListFunctional(Number));
}

public static int addListStructured(List<Integer> Number){
   
   int sum=0;
    for(Integer num: Number){
        sum += num;
    }
    return sum;
}
// public static int sum(int aggegate, int nextnumber){
//     System.out.println(aggegate+" "+ nextnumber);
//     return aggegate + nextnumber;
// }

 public static int addListFunctional(List<Integer> Number){
   
   int sum=0;
    //return Number.stream().reduce(0,Main:: sum);
   // return Number.stream().reduce(0,(x,y) -> x+y);
   return Number.stream().reduce(0,Integer:: sum);
}

}