java中List 遍历

java中List 遍历

代码编写

package com.xiang;

import java.util.Arrays;
import java.util.Iterator;
import java.util.List;

/**
 * Created by IntelliJ IDEA.
 * User: xiang
 * Date: 2021/11/13 20:12
 */
public class ListTraverse {
    /**
     * list 遍历
     *
     * @param args
     */
    public static void main(String[] args) {
        List<String> list = Arrays.asList("tom", "cat", "Jane", "jerry");

        System.out.println("方法1 集合类的通用遍历方式");
        Iterator<String> iterator = list.iterator();
        while (iterator.hasNext()) {
            System.out.print(iterator.next() + ",");
        }

        System.out.println();
        System.out.println("方法2 集合类的通用遍历方式");
        for (
                Iterator<String> iterator2 = list.iterator();
                iterator2.hasNext();
        ) {
            System.out.print(iterator2.next() + ",");
        }

        System.out.println();
        System.out.println("方法3 增强型for循环遍历");
        for (String value : list) {
            System.out.print(value + ",");
        }

        System.out.println();
        System.out.println("方法4 一般型for循环遍历");
        for (int i = 0; i < list.size(); i++) {
            System.out.print(list.get(i) + ",");
        }

    }
}

运行结果

方法1 集合类的通用遍历方式
tom,cat,Jane,jerry,
方法2 集合类的通用遍历方式
tom,cat,Jane,jerry,
方法3 增强型for循环遍历
tom,cat,Jane,jerry,
方法4 一般型for循环遍历
tom,cat,Jane,jerry,
Process finished with exit code 0