如何在Java中将字符串转换为数组

淩亂°似流年 2023-02-28 08:38 8阅读 0赞

Sometimes we have to split **String to array** based on delimiters or some regular expression. For example, reading a CSV file line and parsing them to get all the data to a String array. In this tutorial, we will learn how to convert String to Array in Java program.

有时我们必须根据定界符或某些正则表达式将**String**拆分**为数组** 。 例如，读取CSV文件行并将其解析以将所有数据获取到String数组。 在本教程中，我们将学习如何在Java程序中将String转换为Array。

## Java中的字符串到数组 **(**String to Array in Java**)** ##

String class `split(String regex)` can be used to convert String to array in java.

字符串类`split(String regex)`可用于在Java中将String转换为数组。

If you are working with [java regular expression][], you can also use Pattern class `split(String regex)` method.

如果使用[Java正则表达式][java regular expression] ，则还可以使用Pattern类`split(String regex)`方法。

Let’s see how to convert String to an array with a simple java class example.

让我们看看如何通过一个简单的Java类示例将String转换为数组。

package com.journaldev.util;
    
    import java.util.Arrays;
    import java.util.regex.Pattern;
    
    public class StringToArrayExample {
    
        /**
         * This class shows how to convert String to String Array in Java
         * @param args
         */
        public static void main(String[] args) {
            String line = "My name is Pankaj";
            //using String split function
            String[] words = line.split(" ");
            System.out.println(Arrays.toString(words));
            //using java.util.regex Pattern
            Pattern pattern = Pattern.compile(" ");
            words = pattern.split(line);
            System.out.println(Arrays.toString(words));
        }
    }

The output of the above program is:

上面程序的输出是：

[My, name, is, Pankaj]
    [My, name, is, Pankaj]

![String To Array Java][]

Convert String To Array in Java

用Java将字符串转换为数组

Note that Java provides a legacy class **StringTokenizer** also but you should not use it because it doesn’t have an option for a regular expression and using it is confusing.

请注意，Java还提供了旧式类**StringTokenizer，**但您不应使用它，因为它没有用于正则表达式的选项，使用它会造成混淆。

We can use Java regular expressions also to split String into String array in java, learn more about [java regular expression][].

我们还可以使用Java正则表达式在Java中将String拆分为String数组，了解有关[Java正则表达式的][java regular expression]更多信息。

> 翻译自: [https://www.journaldev.com/776/string-to-array-java][https_www.journaldev.com_776_string-to-array-java]

[java regular expression]: https://www.journaldev.com/634/regular-expression-in-java-regex-example
[String To Array Java]: /images/20230209/64f9b38d0e47408cae3fe5d5e5a0bc40.png
[https_www.journaldev.com_776_string-to-array-java]: https://www.journaldev.com/776/string-to-array-java