java - Another way without abusing memory -

hey have completed problem, wondering if there way without using unnecessary amounts of memory, while still using array. below problem , code.

question:implement method named prezee accept string parameter named book. output screen number of characters before each ‘z’.

example: if string is: “my house ez find. go z street , turn left. ze house black starz on door.”

the output should read: 13 z, 16 z, 29 z, 27 z

code:

import java.util.*; public class prezee{ public static void main(string[] args){    scanner user=new scanner(system.in);   system.out.println("please enter sentence");   string input=user.nextline();     int[] anarray;   anarray=new int[input.length()];   int count=0;   for(int i=0;i<input.length();i++){   string subst=input.substring(i,i+1);      if(!(subst.equalsignorecase("z"))){      count ++;       }      else{      anarray[i]=count;      count=0;      }    }      for(int j=0;j<input.length();j++){       if(anarray[j]!=0){       system.out.print(anarray[j]+ "z ");       }       }      } 

}

alternative this

for(int i=0;i<input.length();i++){ if(input.charat(i)=='z'||input.charat(i)=='z') system.out.println(i + " z"); }