What are the methods for traversing List collection in java?

This article shares four traversal methods in the ordered collection List. I hope it will be helpful to everyone.

(Learning video sharing: java course)

First create a Student class to create objects and provide parameterized and parameterless constructors.

package lesson1;

public class Student {
	String name;
	int age;
	public String getName() {
		return name;
	}
	public void setName(String name) {
		this.name = name;
	}
	public int getAge() {
		return age;
	}
	public void setAge(int age) {
		this.age = age;
	}
	public Student(String name, int age) {
		super();
		this.name = name;
		this.age = age;
	}
	public Student() {
		super();
		// TODO Auto-generated constructor stub
	}
	

}

The following are four types of traversal

package lesson1;

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

public class ListTest {

	public static void main(String[] args) {
		//使用学生类创建四个对象，并给对象中的属性赋初值
		Student s1 = new Student("zhangsan1",20);
		Student s2 = new Student("zhangsan2",21);
		Student s3 = new Student("zhangsan3",22);
		Student s4 = new Student("zhangsan4",23);
		//创建一个集合
		List studentList = new ArrayList();
		
		//将上面的四个学生对象添加到集合中
		studentList.add(s1);
		studentList.add(s2);
		studentList.add(s3);
		studentList.add(s4);
		
		// 普通for循环遍历
//		for (int i = 0 ; i < studentList.size() ; i++) {
//			Student s = (Student)studentList.get(i);
//			System.out.println(s.getName());
//			System.out.println(s.getAge());
//		}
		
		//增强for循环遍历
		for (Object os:studentList) {
			Student s = (Student)os;
			System.out.println(s.getName());
			System.out.println(s.getAge());
		}
		
		//迭代器遍历
//		Iterator it = studentList.iterator();
//		while (it.hasNext()) {
//			Student s = (Student)it.next();
//			System.out.println(s.getName());
//			System.out.println(s.getAge());
//		}
		
		//jdk 1.8版本提供的forEach()方法遍历,这种方法了解就行
//		studentList.forEach((os)->{
//			Student s = (Student)os;
//			System.out.println(s.getName());
//			System.out.println(s.getAge());
//		});
		

	}

}

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