Writing scripts in groovy

It just adds a lot of syntactic sugar on top of Java.

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Static import aliasing Static imports with the as keyword provide an elegant solution to namespace problems. To illustrate this, we will create a script engine and execute code in an infinite loop.

Recently I needed a script to fetch Maven dependencies into a lib directory and ended up with a groovy script.

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Variables In contrast to Java, you can use dynamic typing in Groovy. Instead the whole result of the navigation will be null: if company.

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String As you can see the variable x changed its type during runtime. Groovy supports this function using closures. Suppose you want to get a Calendar instance, using its getInstance method. String In Groovy, you can create multiline strings. In that case the second assignment would throw an error, because you explicitly told Groovy you want this variable to be of type int and it cannot implicitly cast a String to an Integer. This class is responsible for determining the various steps of compilation and would let you introduce new steps or even stop compilation at various phases. MarkupBuilder is inside the package groovy.

It focuses on Groovy specific features and does not explain basic programming knowledge. In case you need to use both classes, you can do: import groovy.

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First of all, you need to create a directory with the following script inside: ReloadingTest. This snippet parses a pom and gives you a list of jars. The compiler figures out the variable type at runtime and you can even the variable type.

Also, there wouldn't seem to be much support for say a groovy based http client. That way Groovy will determine the type of the variable at runtime and the type might even change.

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Groovy Tutorial