Java™ How To Program (Early Objects), Tenth Edition

7.8 Passing Arrays to Methods

This section demonstrates how to pass arrays and individual array elements as arguments to methods. To pass an array argument to a method, specify the name of the array without any brackets. For example, if array hourlyTemperatures is declared as

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double[] hourlyTemperatures = new double[24];

then the method call

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modifyArray(hourlyTemperatures);

passes the reference of array hourlyTemperatures to method modifyArray. Every array object “knows” its own length. Thus, when we pass an array object’s reference into a method, we need not pass the array length as an additional argument.

For a method to receive an array reference through a method call, the method’s ...