What is the difference between a += b and a =+ b , also a++ and ++a?

by

a += b is equivalent to a = a + b

a = +b is equivalent to a = b

a++ and ++a both increment a by 1.
The difference is that a++ returns the value of a before the increment whereas ++a returns the value after the increment.

That is:

a = 10;
b = ++a; //a = 11, b = 11

a = 10;
b = a++; //a = 11, b = 10

More Related Contents:

  1. How do I get the last character, then last two so on.. of a string?
  2. Where I should start coding app pc or android? [closed]
  3. Why does the if statement “if(1)” give error in Java but it holds true in C++?
  4. Call child method in parent’s method? [duplicate]
  5. Spring Boot Configure and Use Two DataSources
  6. How to get a list of current open windows/process with Java?
  7. Modify a class definition’s annotation string parameter at runtime
  8. How to play .wav files with java
  9. Adding days to a date in Java [duplicate]
  10. Testing two JSON objects for equality ignoring child order in Java [closed]
  11. What’s the right way to represent phone numbers?
  12. Get Edited TreeNode from a CellEditorListener
  13. Exception in thread “main” org.openqa.selenium.NoSuchElementException: Unable to locate element: //*[@id=’login-email’]
  14. How to fill data in a JTable with database?
  15. Why shouldn’t I call setVisible(true) before adding components?
  16. why business logic should be moved out of JSP?
  17. ‘:app:lintVitalRelease’ error when generating signed apk
  18. JCE cannot authenticate the provider BC in java swing application
  19. How do I initialize a byte array in Java?
  20. How to pass console arguments to application in eclipse?
  21. Could not find or load main class
  22. Why is System.nanoTime() way slower (in performance) than System.currentTimeMillis()?
  23. Java concurrency: Countdown latch vs Cyclic barrier
  24. Convert text content to Image
  25. When does a Java Thread reach the ‘Die’ State
  26. How can I convert a char to int in Java? [duplicate]
  27. Tomcat: How to find out running Tomcat version?
  28. list all files from directories and subdirectories in Java
  29. Persisting UUID in PostgreSQL using JPA
  30. How do I compare two Integers? [duplicate]

Leave a Comment