How to "invert" numbers in Java

by

I don’t see that you need an algorithm as much. What you have is:

InverseNumber = (myCollection.Length - MySelection);

Thats all you need for even numbers.

With a collection of 1 – 6 for example:
Give 2; 6 – 2 = 4. Also if given 4, 6 – 4 = 2.

You will need a slightly different problem for odds:

1 – 5; with 1 given 1 is at index 0, the opposite is 5, 2 given and the inverse ( 5 – 2) is 3. But if 3 is given, there is no inverse. So you might want to also add a catch for:

if (((myCollection.Length *.5).Round) == mySelection) { //Inverse does not exist!!!}

If you are using just integers, and not arrays of numbers then just replace the myCollection.Length with the upperbound integer.

More Related Contents:

  1. How does Jbutton addActionListener method takes object of any type?
  2. how two interface use two method [closed]
  3. How to set or change the default Java (JDK) version on macOS?
  4. How to solve the “failed to lazily initialize a collection of role” Hibernate exception
  5. Strange floating-point behaviour in a Java program [duplicate]
  6. Java : If A extends B and B extends Object, is that multiple inheritance
  7. java Calendar, Date, and Time management for a multi-timezone application
  8. Should I return a Collection or a Stream?
  9. how to convert milliseconds to date format in android?
  10. Bidirectional Map
  11. Drawing rectangle on a JPanel
  12. Getting enum associated with int value
  13. How can I mock java.time.LocalDate.now()
  14. Android Color Picker [closed]
  15. Query a JSONObject in java
  16. Java switch statement multiple cases
  17. Launch JVM process from a Java application use Runtime.exec?
  18. How to pass parameters to JavaFX application?
  19. Stop spacebar keypress from triggering autocomplete in Eclipse
  20. How to override the cipherlist sent to the server by Android when using HttpsURLConnection?
  21. getHostServices().showDocument() in a FXML File
  22. Native query with named parameter fails with “Not all named parameters have been set”
  23. Returning JsonObject using @ResponseBody in SpringMVC
  24. Using JAXB generated class for an element that requires an integer with a pattern
  25. MultipleOutputFormat in hadoop
  26. CompletableFuture recoverWith equivalent? i.e. exceptionally but return CompletableFuture
  27. Why is XML used for the creation of UI layouts in Android?
  28. Alternative to File.exists() in Java
  29. No data type for node: org.hibernate.hql.internal.ast.tree.IdentNode HQL
  30. Group by field name in Java

Leave a Comment