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  • [Java]字符串数组 与 字符串链表 之间的相互转化

            String[] arr= {"Felix","Einstein","Douglas","Cindy","Bill","Andy"};
            
            List<String> readonlyList=Arrays.asList(arr);// Arrays.asList方法可以将数组直接转化为链表,但此链表变成了‘只读链表’,不能再使用add/remove方法,使用会导致ava.lang.UnsupportedOperationException异常
            Collections.sort(readonlyList);// 使用Collections.sort对链表进行排序
            System.out.print(String.join(",", readonlyList)+"
    ");
            
            String[] arr2=readonlyList.toArray(new String[readonlyList.size()]);// 将字符串链表转化为字符串数组
            System.out.print(String.join(";", arr2));
            
            //System.out.println("list size="+readonlyList.size());
            //readonlyList.remove(0);// list.add("ttt");// Arrays.asList之后的链表是‘只读链表’,不能改变
            System.out.println("list size="+readonlyList.size());
            
            List<String> rwList = new ArrayList<String>(Arrays.asList(arr));// 数组到链表转型的正确方法
            rwList.add("QiangDong Liu");
            rwList.add("Jack Ma");
            rwList.add("Pony Ma");
            rwList.remove(0);
            System.out.print(String.join(",", rwList)+"
    ");

    输出:

    Andy,Bill,Cindy,Douglas,Einstein,Felix
    Andy;Bill;Cindy;Douglas;Einstein;Felixlist size=6
    Bill,Cindy,Douglas,Einstein,Felix,QiangDong Liu,Jack Ma,Pony Ma

    --END-- 2019-12-25 16:28

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  • 原文地址:https://www.cnblogs.com/heyang78/p/11660716.html
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