题解 | #集合遍历#

import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;
import java.util.Scanner;

public class Main {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        List<Integer> list = new ArrayList<>();
        int num1 = scanner.nextInt();
        int num2 = scanner.nextInt();
        int num3 = scanner.nextInt();
        int num4 = scanner.nextInt();
        int num5 = scanner.nextInt();
        scanner.close();
        list.add(num1);
        list.add(num2);
        list.add(num3);
        list.add(num4);
        list.add(num5);
        System.out.print("普通for循环:");

        //write your code here......
        for(int i=0;i<list.size();i++){
            System.out.print(list.get(i)+" ");
        }

        System.out.println();
        System.out.print("增强for循环:");

        //for.....each
        for(int num:list){
            System.out.print(num+" ");
        }
        

        System.out.println();
        System.out.print("迭代器遍历:");

        //利用Stream API实现
        /*
        格式是：list.Stream().foreach(a-->代码块)
        这里的list是你进行操作的列表，stream()是将其转变为流，foreach是对每一个元素进行操作，这个a是流中每个元素的引用
        */
        list.stream().forEach(a-> System.out.print(a+" "));

        System.out.println();
    }
}