java - In convertible cast, casting from T to double -

i want create generic method getting maximal value array. got stuck @ problem of conversion between t type math.max method uses.

here code: first cannot initialize maxvalue like:

t maxvaue = 0; 

secondly cannot use data[i] in math.max, in both cases got error of in convertible cast.

class matrix<t>{     public t getmaxvalue(t[] data){         t maxvalue;         (int i=0; i<data.length; i++){             maxvalue = math.max(data[i], maxvalue);         }         return maxvalue;     } } 

math.max takes int, float, double , long. can not use t.

what can write own max() method using t. example, method take comparator object in param. or t objects can implement comparable interface.

have @ post : how implement generic `max(comparable a, comparable b)` function in java?