What is the method in Groovy for determining if a string is empty?

In Groovy, you can use the isEmpty() method to check if a string is empty. Here is an example:

def str = "Hello"

if (str.isEmpty()) {
    println("字符串为空")
} else {
    println("字符串不为空")
}

The output result is “the string is not empty”

The isEmpty() method will return true if the string is empty, otherwise it will return false.