I need to be able to deal with functions like matlab

Is there a variable type function in java? I need to be able to deal with functions like matlab does.
For example:

Code:

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function x = "X^2";

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Then evaluate the function at a point, for example:

Code:

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x(10);

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Is this possible?
Thanks.

What's wrong with doing:

Code:

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public double f(double x) {
return x*x;
}

System.out.println(f(10));

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Greetings.