java遍历list对象集合_java遍历List集合的方法有哪些[通俗易懂]

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本文为大家分享了有序集合List中的四种遍历方式，希望能对大家有所帮助。

(学习视频分享：java课程)

先创建一个Student类，用来创建对象，并提供有参和无参构造方法。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

}

}

以下是四种遍历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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