Learn Java for Web Development

408 APPENDIX B: Introduction to Groovy

   Line 4 has an expression, $name, that is evaluated to vishal, as shown in

the output.

   Line 5 has an expression, $path, that is evaluated to c:/groovy, as shown in

the output.

   Line 6 has a $ sign, but it is not an expression, so it is displayed in the output.

   Line 7 has a slash, which needs to be escaped.

Dollar Slashy Strings

In multiline slashy strings, a slash still needs to be escaped. Moreover, in multiline slashy strings, an
unescaped dollar sign that is not an expression results in a MissingPropertyException, as illustrated
in Listing B-14.

Listing B-14. MissingPropertyException in Multiline Slashy String

1. def name = "vishal"


2. def path= "c:/groovy"


3. def multilineSlashy = /


4. Hello $name


5. path= $path


6. dollar = $test


7. path = c:\/groovy


8. /


9. println multilineSlashy

Caught: groovy.lang.MissingPropertyException: No such property: test for class:
hello
groovy.lang.MissingPropertyException: No such property: test for class: hello
at hello.run(hello.groovy:3)

In Listing B-14, there is no such property as test; $test in line 6 is interpreted as an expression,
which results in a MissingPropertyException.

Now, let’s look at the code in Listing B-15, specifically line 6.

Listing B-15. Unescaped Dollar Sign in Multiline Slashy String

1. def name = "vishal"


2. def path= "c:/groovy"


3. def multilineSlashy = /


4. Hello $name


5. path= $path


6. dollar = $ test


7. path = c:\/groovy


8. /


9. println multilineSlashy