Java 遍历方式
一、遍历方式
- 迭代器
- 增强for循环
- 普通for循环
二、使用
迭代器:
public class IteratorMethod {
public static void main(String[] args) {
Collection<String> Coll=new ArrayList<>();
Coll.add("姚明");
Coll.add("科比");
Coll.add("麦迪");
Coll.add("艾弗森");
Coll.add("欧文");
System.out.println(Coll);
System.out.println("=================");
//多态 接口 实现类对象
Iterator<String> it=Coll.iterator();
while(it.hasNext()){
String s=it.next();
System.out.println(s);
}
}
}
增强for循环:
public class Student {
private String name;
private int age;
public Student() {
}
public Student(String name, int age) {
this.name = name;
this.age = 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;
}
}
......{
List<Student> students = new ArrayList<>();
students.add(new Student("科比",24));
students.add(new Student("麦迪",13));
students.add(new Student("乔丹",64));
students.add(new Student("姚明",20));
for(Student st : stufents) {
System.out.println(st);
}
}
普通for循环:
......
for (int i = 0; i < students.size(); i++) {
Student s = students.get(i);
System.out.println(s);
}
......
本文来自博客园,作者:手可敲星辰脚驾七彩云,转载请注明原文链接:https://www.cnblogs.com/arek/p/16653713.html,谢谢!