The trim method in Java is used to remove leading and trailing white space from a string. It returns a new string with the white space removed, and the original string is not modified.
If you are calling the trim method on a string and ignoring the result, it means that you are not using the returned string in any way. This is generally considered poor practice, as it may indicate that the result of the trim method is not being used as intended.
Here's an example of how the trim method is typically used:
String s = " hello "; // remove leading and trailing white space s = s.trim(); // print the modified string System.out.println(s); // prints "hello"
In this example, the trim method is used to remove the leading and trailing white space from the string s, and the result is assigned back to s. The modified string is then printed to the console.
If you are not using the result of the trim method, it is generally better to avoid calling it altogether. If you do need to remove leading and trailing white space from a string, you can use the strip method introduced in Java 11, which does the same thing as trim but also removes leading and trailing white space characters specified in the Unicode standard.