Python "if string" expression in Java

In Python one can write if "string" to test if a string is blank or contains all white-space characters.

if "somestring":
    print(True)
else:
    print(False)

Output: True

if "":
    print(True)
else:
    print(False)

Output: False

How could this easily be done in Java?

One could do the following, but the statement would evaluate to false if someString contained any white-space characters:

if( someString.equals("") {
    System.out.println(true);
} else {
    System.out.println(false);
}