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The largest structure in a java program is a Class. The structure that is the second largest, and a sub-component of a Class is a Method. Each Method has a name and code inside of it that performs a function. Whenever the Method is called upon by naming it the code inside of it is executed. To use a Method in a separate Class requires an Object to be created inside of the separate Class and then the Object is stated along with the Method to be able to perform a Method's specific function.

If the method is defined as static then a class object is not required to call this method.

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