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In the method call operate.print(ar2) the actual array ar2 is connected to the parameter x of the method. The picture shows this.

By using parameters with methods you can use the same method with different data. The method becomes a useful tool that can be used in many situations.

Note: In this picture, the arrow connected to ar2 and the arrow connected to x are different, even though they point to the same object. In computer memory, as the program is running, the bit pattern in x will be identical to the bit pattern in ar2. Both will contain the unique bit pattern that is a reference to the array object.