Java program for splitting and concatenating strings

To split and concatenate strings in Java, use split() and join() methods as shown in the example below −

Example

public class Demo{
   public static void main(String args[]){
      String my_str = "This_is_a_sample";
      String[] split_str = my_str.split("_", 4);
      System.out.println("The split string is:");
      for (String every_Str : split_str)
      System.out.println(every_Str);
      String joined_str = String.join("_", "This", "is", "a", "sample");
      System.out.println("The joined string is:");
      System.out.println(joined_str);
   }
}

Output

The split string is:
This
is
a
sample
The joined string is:
This_is_a_sample

A class named Demo contains the main function. Here a String object is defined and split to the last word based on '_' value. Iterate using 'for' loop and split the string based on '_' value. Then, use the 'join' function to concatenate the strings. Relevant messages will be displayed on the console.

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