Question

我的arraylist由一个包含字符串列表的数组组成，每个字符串内部用逗号分隔，我想将其中一个字符串拆分为以逗号分隔的子字符串，我知道如何通过使用拆分将其分配到数组方法，但我很难找到类似于数组列表的东西，继承代码：

String[] widgets2 = 
        {

            "1,John,Smith,John1989@gmail.com,20,88,79,59",
            "2,Suzan,Erickson,Erickson_1990@gmailcom,19,91,72,85",
            "3,Jack,Napoli,The_lawyer99yahoo.com,19,85,84,87",
            "4,Erin,Black,Erin.black@comcast.net,22,91,98,82",
            "5,Adan,Ramirez,networkturtle66@gmail.com,100,100,100"

        };

         ArrayList<String> jim = new ArrayList<String>(Arrays.asList(widgets2));

System.out.println(jim.split(0));

Answer 1

它类似于您对arrays所做的操作。只是实施是不同的。要让值循环遍历它们：

List<String> jim = new ArrayList<String>(Arrays.asList(widgets2));
for(String currentString : jim){//ArrayList looping
 String[] separatedStrings = currentString.split(",");
    for(String separatedString : separatedStrings){//Now its array looping
       //Do something now whatever you like to
    }
}

如果您想获得索引并决定要获取哪个值，请使用常规for循环使用索引并使用jim.get(index)并使用split()。

话虽如此，是什么阻止你在列表中循环？这是数组列表的常见用法 - 循环遍历它:)

Answer 2

    String jim_string = jim.toString().replace("[", "");
    jim_string.replace("]", "");
    String splitted[] = jim_string.split(",");
    System.out.println(splitted[0]);

Answer 3

put the below code lines into your code, it'll give your desire output.

int indx=0; //use the index you want to get & split
String tmp = jim.get(indx); // get the string from the ArrayList
if(tmp!=null && !tmp.equals("")){ // null check
for (String retval: tmp.split(";")){ // split & print
     System.out.println(retval);
  }
}

Java：在数组列表中查找字符串

3 个答案: