java - Need code that counts variables from a method in a class generated randomly for each time the program is run -

can count each time variable choice 1 or each time variable choice 2 add total times each count generated?
ross gerard is: drinking coffee
ross gerard is: @ work
ross gerard is: eating snack
ross gerard is: @ work
ross gerard is: playing dogs
ross gerard is: primping in mirror
ross gerard is: doing jiu-jitsu
ross gerard is: playing dogs
ross gerard is: eating snack
ross gerard is: walking
ross gerard is: eating snack
ross gerard is: playing nintendo
ross gerard is: playing dogs
ross gerard is: singing
ross gerard is: walking
ross gerard is: kissing girlfriend
ross gerard is: @ work
ross gerard is: swimming
ross gerard is: playing nintendo
ross gerard is: studying java

import java.util.random; class student  {  public void studentisdoing() {     (int counter = 0; counter < 20; counter++)     {     random r = new random();      int choice = 1 + r.nextint(15);     string response = "";      if ( choice == 1 )         response = "playing ball";     else if ( choice == 2 )         response = "studying java";     else if ( choice == 3 )         response = "kissing girlfriend";     else if ( choice == 4 )         response = "swimming";     else if ( choice == 5 )         response = "doing jiu-jitsu";     else if ( choice == 6 )         response = "reading paper";     else if ( choice == 7 )         response = "singing";     else if ( choice == 8 )         response = "primping in mirror";     else if ( choice == 9 )         response = "taking shower";     else if ( choice == 10 )         response = "eating snack";     else if ( choice == 11 )         response = "drinking coffee";     else if ( choice == 12 )         response = "walking";     else if ( choice == 13 )         response = "playing dogs";     else if ( choice == 14 )         response = "at work";     else if ( choice == 15 )         response = "playing nintendo";     else          response = "in bathroom";       system.out.println( "ross gerard is: " + response );      }           }   } 

first of all, advise using switch syntax kind of if-else conditions.

for question, should initailize array of size 16 (or 15) @ start of loop, , after getting choice selected add:

arr[choice]++; 

at end of loop, array hold in each index amount of times choice chosen.