java - Simulate the tossing of a coin three times and print out the percentage of cases in which one gets three tails -

attached problem: http://puu.sh/42qti/ea955e5bef.png

in terms of code, have far

the question asks "calculate simulated percentage of 3 tails," part stuck on. give me insight on progress next?

public static boolean isthreetails(){             random rand = new random();             int numberoftosses = 3;             int numberofheads = 0;             int numberoftails = 0;              for(int = 1; <= numberoftosses; i++){                 int value = rand.nextint(2);                 if(value == 0){                     numberoftails++;                 }else{                     numberofheads++;                 }             }             if(numberoftails == 3){                 return true;             }             else{                 return false;             }         }  double numtosses = 1000000; //choose whatever here         double threetails = 0;         for(int =0; < numtosses; i++){             if(isthreetails()){                  threetails++;             }         }         system.out.println("theoretical probability of 3 tails: " + (double) 1/8);         system.out.println("actual results " + numtosses + " tosses = " + threetails/numtosses); 

edit: here, creating counter when there triple tails. increment numberoftripletails counter. if rolls "h", numberoftails go zero. however, code seems give '3' answer.

edit 2: done!

the method have written simulates 3 tosses. i've modified method callable function isthreetails()

public static boolean isthreetails(){     random rand = new random();     int numberoftosses = 3;     int numberofheads = 0;     int numberoftails = 0;      for(int = 1; <= numberoftosses; i++){         int value = rand.nextint(2);         if(value == 0){             numberoftails++;         }else{             numberofheads++;         }     }     if(numberoftails == 3){         return true;     }     else{         return false;     } } 

now want call method main method of threetosses.java

double numtosses = 100; //choose whatever here double threetails = 0; for(int =0; < numtosses; i++){     if(isthreetails()){          threetails++;     } } system.out.println("theoretical probability of 3 tails: " + (double) 1/8); system.out.println("actual results " + numtosses + " tosses = " + threetails/numtosses);