How to Concatenate Array Elements into a String in Java: The Equivalent of PHP\'s join() Function?

Java Equivalent of PHP's Join() Function for Arrays

PHP's join() function allows you to concatenate elements of an array into a string, separating each element with a specified glue. Java offers a similar functionality through the String.join() method, available since Java 8.

String.join() in Java

Starting from Java 8, the String.join() method can be used to achieve the same functionality as PHP's join():

<code class="java">String.join(", ", new String[]{"Hello", "World", "!"})</code>

This will generate the following output:

Hello, World, !

Apache Commons Lang's StringUtils.join()

For Java versions prior to 8, or for more advanced customization options, you can use the StringUtils class from Apache Commons Lang. The StringUtils.join() method also allows you to concatenate array elements into a string. For example:

<code class="java">StringUtils.join(new String[] {"Hello", "World", "!"}, ", ")</code>

This will return the same output as the Java 8 String.join() example:

Hello, World, !

By utilizing either the Java 8 String.join() method or the StringUtils.join() method from Apache Commons Lang, you can easily concatenate elements of an array into a single string while specifying the desired separator.

The above is the detailed content of How to Concatenate Array Elements into a String in Java: The Equivalent of PHP\'s join() Function?. For more information, please follow other related articles on the PHP Chinese website!