java - Exporting variables with multiple values? -

import java.util.*; import java.text.*; import java.io.*;  public class avgtime {  static double hrs1; static double min1;  public static void main(string[] args) throws interruptedexception, filenotfoundexception {  scanner in = new scanner(system.in);  system.out.print("how many times? "); int numoftimes = in.nextint();  double hrtotal = 0; double mintotal = 0;  (int = 1; <= numoftimes; i++){    system.out.println("\nenter time in military time notation: ");   system.out.print("hour  ");   double hrs1 = in.nextdouble();   system.out.print("minute  ");   double min1 = in.nextdouble();      hrtotal += hrs1;   mintotal += min1; }  //calculate average double avghr1 = hrtotal/numoftimes; double timemin1 = math.round(mintotal/numoftimes);   decimalformat df = new decimalformat("###"); string hours = df.format(avghr1); string minutes = df.format(timemin1);  string time = hours+":"+minutes+":"+00; string mt = hours+minutes;       simpledateformat fmtmil = new simpledateformat("hh:mm:ss");     date indate = fmtmil.parse(time, new parseposition(0));     simpledateformat fmtampm = new simpledateformat("hh:mm:ss aa");     stringbuffer outdate = fmtampm.format(indate, new stringbuffer(), new fieldposition(0)); system.out.println("\nthe average time " + outdate+"\n"+mt+" in military time.\n\n");      string copy = "copying...";      thread.sleep( 550 );     for( int = 0; < copy.length(); i++ ) {         system.out.print(copy.charat( ) );          try{ thread.sleep( 105 ); }catch( exception e ){}         }           printwriter p = new printwriter("times.txt");            p.println(hrs1+min1);             p.close();           system.out.println("\ndone\n\n\n");             thread.sleep( 550 );   } } 

i want export file times entered user. example if user sets numoftimes 2, have 2 different values hrs1 , min1.

say enter: 1629 , 2018.

i want text file display hrs1 (16) , min1 (29) 1629. instead of 'hrs1+min1' when put hrs1+min1 exports '0.0'. want export "1629" , "2018" .

why , how fix it?

output

how many times? 2  enter time in military time notation:  hour  16 minute  29  enter time in military time notation:  hour  20 minute  18 

what should exported:

1629 2018 

there 2 major modifications make code work. first printwriter must declared , instantiated outside of loop. , calls println must occur inside of loop. second, doubles must converted string prior printing , substring appropriately.

    scanner in = new scanner(system.in);      system.out.print("how many times? ");     int numoftimes = in.nextint();      double hrtotal = 0;     double mintotal = 0;      printwriter p = new printwriter("times.txt");      (int = 1; <= numoftimes; i++) {          system.out.println("\nenter time in military time notation: ");         system.out.print("hour  ");         double hrs1 = in.nextdouble();         system.out.print("minute  ");         double min1 = in.nextdouble();          hrtotal += hrs1;         mintotal += min1;         string hrs = string.valueof(hrs1);         string min = string.valueof(min1);         p.println(hrs.substring(0, hrs.indexof(".")) + min.substring(0,min.indexof(".")));     }     p.close(); 

before change code adding 2 doubles hrs1 , mins1 using actual arithmetic , using static variables had declared @ top of class.

static double hrs1; static double min1; 

you should remove these static doubles since never used. because call println outside of loop, causing static doubles referenced instead of hrs1 , mins1 declared , assigned inside loop. thought using locals variables declared in loop never in scope.