Generate True Random Number Generator in any of programming language

As per documentation, java.util.Random is not a true random generator.

From below link: http://ift.tt/1nenWxF, it has been quoted that

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An instance of this class is used to generate a stream of pseudorandom numbers. The class uses a 48-bit seed, which is modified using a linear congruential formula.

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I have to implement True Random Number Generator. Please suggest alternatives in any programming language Or in java