python for倒序遍历数组 |
您所在的位置：网站首页 › python 倒着遍历 › python for倒序遍历数组 |
python for倒序遍历数组
1、泛型数组遍历出来，集合用ArrayList,遍历格式为(foreach)：for(类（将所有类型带过来） 循环变量名称（自定义一个e）: 要被遍历的对象){}2、for(元素的数据类型（int这些，包装类型integer也可） 变量自定义一个 : Collection集合or数组){ }3、上代码：People.java package com.equals; public class People { private Integer id; private String name; private String post; public Integer getId() { return id; } public void setId(Integer id) { this.id = id; } public String getName() { return name; } public void setName(String name) { this.name = name; } public String getPost() { return post; } public void setPost(String post) { this.post = post; } public People(String name,String post){ // this.id = id; this.name = name; this.post = post; } @Override public String toString() { return "People{" + "id=" + id + ", name='" + name + ''' + ", post='" + post + ''' + '}'; } }Test.java package com.equals; import java.util.ArrayList; import java.util.Collection; public class test{ public static void main(String[] args) { ArrayList people = new ArrayList(); people.add(new People("zhoonghau","php")); people.add(new People("zhoonghauzhognhuada","java1000")); people.add(new People("zhoonghau3","php1111")); for (People e:people ) { System.out.println("People{" + "id=" + e.getId() + ", name='" + e.getName() + ''' + ", post='" + e.getPost() + ''' + '}'); } String[] arr = new String[]{"学生","职场人","管理员"}; Integer[] arr2 = new Integer[]{1,2,23}; for (Integer w:arr2 ) { System.out.print(w+" "); } System.out.println(); Collection collection = new ArrayList(); collection.add("jiyu "+"java"); collection.add("xiaaohuadonghe"); collection.add("zhongtongsida"); for (String z:collection){ System.out.println(z); } } }4、结果 People{id=null, name='zhoonghau', post='php'} People{id=null, name='zhoonghauzhognhuada', post='java1000'} People{id=null, name='zhoonghau3', post='php1111'} 1 2 23 jiyu java xiaaohuadonghe zhongtongsida |
【本文地址】
今日新闻 |
推荐新闻 |