Java List Join: Complete Guide

In Java, the List interface does not have a join method, but you can achieve similar functionality using other methods, such as the String.join method. The String.join method can concatenate the elements of a List using a specified delimiter to form a single string. Here is an example code:

List<String> list = new ArrayList<>();
list.add("apple");
list.add("banana");
list.add("orange");

String result = String.join(", ", list);
System.out.println(result); // 输出：apple, banana, orange

In the above code, we create a List with three elements and then use the String.join method to connect the elements in the List into a string separated by commas and spaces. This makes it easy to concatenate the elements in the List into a single string for output or other operations.