Remove the last n characters of a string in Java

In this tutorial, we are going to learn about how to remove the last n characters of a string in Java.

Consider, we have a following string:

String name = "piano";

Now, we want to remove the last 3 three characters "ano" from the above string.

Remove the last n characters

To remove the last n characters of a string in Java, we can use the built-in substring() method by passing 0, String.length()-n as an argument to it.

The String.length() method returns the total number of characters in a string, n is the number of characters we need to remove from a string.

Here is an example, that removes the last 3 characters of a string:

String name = "piano";
String result = name.substring(0, name.length()-3);

System.out.println(result);

Output:

"pi"

Note: The extraction begins at index 0, and ends before the index name.length()-3 that is 2.

The substring() method doesn’t mutates the original string, instead of it creates a new one with the extracted characters.