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  1. import java.lang.Math; 
  2. import java.text.DecimalFormat;
  3. import java.util.ArrayList;
  4. import java.util.HashMap;
  5. import java.util.List;
  6. import java.util.Map;
  7.  
  8. class HelloWorld{
  9.  
  10.     public static void main(String []args){
  11.  
  12.         Map < String, String[] > myTimes = generateTime(10);
  13.         String[] array;
  14.  
  15.         for (String s: myTimes.keySet()) {
  16.             System.out.println(s + ": ");
  17.             array = myTimes.get(s);
  18.  
  19.             for (String t: array) {
  20.                 System.out.print(t + "\t");
  21.              }
  22.         System.out.println("\n");
  23.         }
  24.     }
  25.  
  26.  
  27.  
  28.     private static Map < String, String[] > generateTime(int id) {
  29.  
  30.          Map < String, String[] > myTimes = new HashMap < > ();
  31.          double random = Math.random();
  32.          double digits = Math.floor(random);
  33.          String minutes = Double.toString(digits);
  34.          String firstHour;
  35.          String[] times = new String[10];
  36.  
  37.          if (0 <= random && random <= 0.3) {
  38.                 firstHour = "06";
  39.          } else if (0.3 < random && random <= 0.6) {
  40.                 firstHour = "07";
  41.          } else if (0.6 < random && random <= 0.9) {
  42.                 firstHour = "08";
  43.          } else {
  44.                 firstHour = "09";
  45.          }
  46.          int hour = Integer.parseInt(firstHour);
  47.          int counter = 0;
  48.          while (hour <= 23) {
  49.               times[counter] = hour + ":" + minutes;
  50.               counter++;
  51.               hour += 2;
  52.          }
  53.          myTimes.put(Integer.toString(id), times);
  54.          return myTimes;
  55.     }
  56.  
  57. }
  58.  
Success #stdin #stdout 0.09s 320576KB
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stdin
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Standard input is empty
stdout
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10: 
6:0.0	8:0.0	10:0.0	12:0.0	14:0.0	16:0.0	18:0.0	20:0.0	22:0.0	null
https://ideone.com/WVflSk
language:
Java (HotSpot 12)
created:
8 years ago
visibility:
public

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