Picture of the Action

It looks as if there is a contradiction here:

In the previous example, the method COULD NOT change the int variable in main().
In this example, the method CAN change the int array in main().

There is actually no contradiction here. Remember that an array is an object. When an object is a parameter, the called method gets a reference to the object. That is, it gets a way to find the object in memory, but no new object is created. In the example, the called method gets a reference to the array object. There is only one array, so any changes will affect that array. The picture that shows this.

When the method call cng.zeroElt( value, 0 ) is executed, the parameter x of the method gets the value of the of the variable, which is a reference to the array.

QUESTION 7:

Since the method zeroElt() has a reference to the array, can it change individual array elements?

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