List<String>
时间: 2023-11-11 10:31:35 浏览: 44
List<String> is a data structure in Java that represents a list of strings. It is a part of the Java Collections Framework and is used to store a collection of strings in a specific order. The List interface provides methods to add, remove, and access elements from the list. It also allows duplicate elements and maintains the insertion order of elements. The List<String> data structure is often used in various applications such as web development, data analysis, and software development.
相关问题
List <string>
List <string> 是一个包含字符串元素的列表。要将一个 String 数组转换为 List <string>,可以使用 Arrays.asList() 方法。例如,如果有一个 String 数组 strs,可以使用以下代码将其转换为 List <string>:
String[] strs = {"aa","bb","cc"};
List<String> list = Arrays.asList(strs);
如果要将一个 List <string> 转换为 String 数组,可以使用 toArray() 方法。例如,如果有一个 List <string> list,可以使用以下代码将其转换为 String 数组:
List<String> list = new ArrayList<>();
list.add("a");
list.add("b");
list.add("c");
String[] str = list.toArray(new String[list.size()]);
List<string>
以下是将String数组转换为List<String>和将List<String>转换为String数组的示例:
1. 将String数组转换为List<String>:
```java
String[] arr = new String[]{"s1","s2","s3"};
List<String> list = Arrays.asList(arr);
```
2. 将List<String>转换为String数组:
```java
List<String> list = new ArrayList<String>();
list.add("s1");list.add("s2");
list.add("s3");
String[] arr = list.toArray(new String[list.size()]);
```
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