Package dev.comfast.util

Class Utils

java.lang.Object
dev.comfast.util.Utils
public class Utils extends Object

  • Constructor Details

    • Utils

      public Utils()

  • Method Details

    • sleep

      public static void sleep​(long ms)
      Unchecked sleep. Checked InterruptedException is wrapped into RuntimeException.

    • trimString

      public static String trimString​(Object input, int maxLength)
      Parameters:
      input - string or object
      maxLength - max length of result string
      Returns:
      First characters from input string

    • transposeMatrix

      public static <T> List<List<T>> transposeMatrix​(List<List<T>> matrix)
      Parameters:
      matrix - list of lists eg. 
      
   ["1", "2", "3", "4"],
   ["5", "6", "7", "8"]
      Returns:
      transposed list of lists, eg. 
      
   ["1", "5"],
   ["2", "6"],
   ["3", "7"],
   ["4", "8"],

    • withSystemProp

      public static void withSystemProp​(String systemPropertyName, Runnable func)
      Restore system property after func is done. It's safe to edit it inside given function, for test purposes or any other. e.g. 
      
     // here "my.timeout" is 3000
     withSystemProp("my.timeout", () -> {
         System.setProperty("my.timeout", "0");
         doSomeTests();
     })
     // here "my.timeout" is restored to 3000
      Parameters:
      func - within this function can edit system prop freely without side effects for the rest of the code }

    • isTruthly

      public static boolean isTruthly​(Object input)
      Parameters:
      input - any object
      Returns:
      false if null, false, 0, trimmed empty string