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import java.util.Random; |
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/** |
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* A random number generator with the same properties as class {@link |
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* Random} but isolated to the current Thread. Like the global |
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* generator used by the {@link java.lang.Math} class, a |
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* ThreadLocalRandom is initialized with an internally generated seed |
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* that may not otherwise be modified. When applicable, use of |
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* ThreadLocalRandom rather than shared Random objects in concurrent |
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* programs will typically encounter much less overhead and |
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* contention. ThreadLocalRandoms are particularly appropriate when |
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* multiple tasks (for example, each a {@link ForkJoinTask}), use |
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* random numbers in parallel in thread pools. |
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* A random number generator isolated to the current Thread. Like the |
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* global {@link java.util.Random} generator used by the {@link |
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* java.lang.Math} class, a ThreadLocalRandom is initialized with an |
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* internally generated seed that may not otherwise be modified. When |
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* applicable, use of ThreadLocalRandom rather than shared Random |
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* objects in concurrent programs will typically encounter much less |
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* overhead and contention. ThreadLocalRandoms are particularly |
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* appropriate when multiple tasks (for example, each a {@link |
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* ForkJoinTask}), use random numbers in parallel in thread pools. |
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* |
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* <p>Usages of this class should typically be of the form: |
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* {@code ThreadLocalRandom.current().nextX(...)} (where |
