【Java】三种不同方式遍历集合

遍历集合"/>

【Java】三种不同方式遍历集合

使用三种不同循环遍历List<Student>

请使用多种不同的方式遍历 学生对象集合

1. 传统 for 循环
2. 迭代器Iterator
3. 增强for循环 底层基于迭代器Iterator

示例代码：

Student.java

package com.collection.Demo04;public class Student {private String name;private Integer age;public String getName() {return name;}public void setName(String name) {this.name = name;}public Integer getAge() {return age;}public void setAge(Integer age) {this.age = age;}public Student(String name, Integer age) {this.name = name;this.age = age;}
}

Test07.java

package com.collection.Demo04;import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;/*** 传统 for 循环* 迭代器Iterator* 增强for循环 底层基于迭代器Iterator*/
public class Test07 {public static void main(String[] args) {List<Student> students = new ArrayList<Student>();students.add(new Student("name1", 32));students.add(new Student("name2", 21));students.add(new Student("name3", 23));//方式1——传统 for循环 遍历集合for (int i = 0; i < students.size(); i++) {Student student = students.get(i);System.out.println(student.getName() + "," + student.getAge());}//方式2—— 迭代器遍历集合Iterator<Student> iterator = students.iterator();while (iterator.hasNext()) {Student student = iterator.next();System.out.println(student.getName() + "," + student.getAge());}//方式3—— 增强for循环 for eachfor (Student student : students) {System.out.println(student.getName() + "," + student.getAge());}}
}

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