Java 用于迭代ArrayList

在本文中，我们将了解如何迭代ArrayList。ArrayList类是一个可调整大小的数组，可以在java.util包中找到。在Java中，内置数组和ArrayList之间的区别在于数组的大小是不能被修改的。

下面是相同的示例−

假设我们的输入是 −

Run the program

所期望的输出将是 −

A elements of the list are:
50 100 150 200 250 300 350

步骤

Step 1 - START
Step 2 - Declare namely
Step 3 - Define the values.
Step 4 - Create a list of integers and initialize elements in it.
Step 5 - Display the list on the console.
Step 6 - Iterate over the elements, and fetch each element using ‘get’ method.
Step 7 - Display this on the console.
Step 6 - Stop

示例1

在这里，我们将所有操作绑定在“main”函数下面。

import java.util.*;
public class Demo {
   public static void main(String[] args){
      System.out.println("The required packages have been imported");
      List<Integer> numbers = Arrays.asList(50, 100, 150, 200, 250, 300, 350);
      System.out.println("A list is declared");
      System.out.println("\nA elements of the list are: ");
      for (int i = 0; i < numbers.size(); i++)
         System.out.print(numbers.get(i) + " ");
   }
}

输出

The required packages have been imported
A list is declared

A elements of the list are:
50 100 150 200 250 300 350

示例2

在这里，我们将操作封装到展示面向对象编程的函数中。

import java.util.*;
public class Demo {
   static void multiply(List<Integer> numbers){
      System.out.println("\nA elements of the list are: ");
      for (int i = 0; i < numbers.size(); i++)
         System.out.print(numbers.get(i) + " ");
   }
   public static void main(String[] args){
      System.out.println("The required packages have been imported");
      List<Integer> input_list = Arrays.asList(50, 100, 150, 200, 250, 300, 350);
      System.out.println("A list is declared");
      multiply(input_list);
   }
}

输出

The required packages have been imported
A list is declared

A elements of the list are:
50 100 150 200 250 300 350