How to Remove Leading and Trailing Spaces from Strings in Java Using trim()?

How to Eliminate Leading and Trailing Spaces in Java Strings

Question:

Can Java provide a straightforward method for eliminating trailing and leading spaces from a string? For instance, if we have the string " keep this ", we would want to transform it into "keep this" without spaces.

Answer:

Yes, Java features a built-in method called trim() specifically designed for this purpose.

Implementation:

<code class="java">String oldString = "  keep this  ";
String newString = oldString.trim();</code>

Output:

no spaces:keep this

Explanations:

• trim() eliminates all leading and trailing spaces from the string.
• In our example, " keep this " is transformed into "keep this" because the spaces at the start and end of the original string are removed.
• replace(" ","") is not the most efficient method for this task as it replaces all occurrences of space characters, which is not our intention in this case.

By leveraging trim(), Java developers can effectively remove unwanted spaces from strings, ensuring clean and efficient handling of string data.

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