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));
            if(i < 4){
                System.out.print(" ");
            }
        }
        

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

        //write your code here......
        int count = 0;
        for(int num : list){
            System.out.print(num);
            if(count < 4){
                System.out.print(" ");
            }
            count++;
        }
        

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

        //write your code here......
        count = 0;
        Iterator<Integer> iter = list.iterator();
        while(iter.hasNext()){
            System.out.print(iter.next());
            if(count < 4){
                System.out.print(" ");
            }
            count++;
        }
        System.out.println();
    }
}