String s1 = "hello world"; String s2 = " "; String s3 = ""; System.out.println(StringUtil.isEmptyOrSpaces(s1)); // prints false System.out.println(StringUtil.isEmptyOrSpaces(s2)); // prints true System.out.println(StringUtil.isEmptyOrSpaces(s3)); // prints true
String s = null; System.out.println(StringUtil.isEmptyOrSpaces(s)); // prints trueIn summary, `StringUtil` is a class available in the `com.intellij.openapi.util.text` package that provides utility methods for working with strings, including `isEmptyOrSpaces`, which checks whether a string is null, empty or contains only whitespace characters.