operations research - Error in Java code StdRandom.uniform -

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• stdrandom, stdout, insertion cannot resolved 3 answers

i'm trying run java code using eclipse. i'm running code: http://algs4.cs.princeton.edu/65reductions/simplex.java.html got error in line 317/ 319/ 322 "stdrandom cannot resolved"

get stdrandom princeton's repository here, compile along simplex.java