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I am using SecureRandom class in java with default constructor and after i run it four times and each times i will take back 4 "supposed highly secured random numbers" .
First run : -35 -43 -127 12
Second run:-123 114 4 55
Third run:39 -19 3 -51
Fourth run: 111 -48 -50 55
Now i want to know is there any statistical analysis which i can decide if these generator provide me "good" random numbers . Or i just simply can decide it by eye just seeing that in each run we will not take let say the same value twice or three times . According to Scott Adams and others is impossible to proof how good a generator of random numbers is but if it produce you let say for numbers in range 0-15 and you roll this four times and get 4 nine than it probably is not so good. Anyway i am not sure how to determine if my generator is good or not and i will appreciate any feedback,
Thanks in advance