How do you count the elements of an array in java

What do you mean by “the count”? The number of elements with a non-zero value? You’d just have to count them.

There’s no distinction between that array and one which has explicitly been set with zero values. For example, these arrays are indistinguishable:

int[] x = { 0, 0, 0 };
int[] y = new int[3];

Arrays in Java always have a fixed size – accessed via the length field. There’s no concept of “the amount of the array currently in use”.

Related Posts:

  1. How can I convert a char to int in Java? [duplicate]
  2. “PKIX path building failed” and “unable to find valid certification path to requested target”
  3. How can I convert IPV6 address to IPV4 address?
  4. Spring Boot – Unable to resolve Whitelabel Error Page
  5. When do you use Java’s @Override annotation and why?
  6. Java Error “Exception in thread “main” java.util.InputMismatchException” On an Array program
  7. How to sort an ArrayList?
  8. getting error HTTP Status 405 – HTTP method GET is not supported by this URL but not used `get` ever?
  9. What is a classpath and how do I set it?
  10. When is the @JsonProperty property used and what is it used for?
  11. Print ArrayList
  12. “Missing return statement” within if / for / while
  13. Understanding regex in Java: split(“\t”) vs split(“\\t”) – when do they both work, and when should they be used
  14. Make copy of an array
  15. How can I use ant to execute commands on linux?
  16. Invalid initial heap size -Xms4096M
  17. How do I use a PriorityQueue?
  18. What does Java option -Xmx stand for?
  19. Global variables in Java
  20. Illegal Escape Character “\”
  21. Error – trustAnchors parameter must be non-empty
  22. Calculating the angle between the line defined by two points
  23. Wait for page load in Selenium
  24. What does regular expression \\s*,\\s* do?
  25. Constructor cannot be applied to given types?
  26. Printing HashMap In Java
  27. Java “.class expected”
  28. Java Initialize an int array in a constructor
  29. How Exactly Does @param Work – Java
  30. Return string Input with parse.string
  31. Android ListView headers
  32. What does -XX:MaxPermSize do?
  33. What does .class mean in Java?
  34. What does the following Oracle error mean: invalid column index
  35. how to fix java.lang.arrayindexoutofboundsexception: 0?
  36. What is the best math library to use with java?
  37. What is the difference between a null array and an empty array?
  38. Why is there no String.Empty in Java?
  39. How to initialize List object in Java?
  40. PrintWriter append method not appending
  41. Using ADB to capture the screen
  42. What is the difference between response.sendRedirect() and request.getRequestDispatcher().forward(request,response)
  43. Recursion vs. Iteration (Fibonacci sequence)
  44. What is difference between Errors and Exceptions?
  45. What is the difference between Integer and int in Java?
  46. Static Error: This class does not have a static void main method accepting String[]
  47. “uses unchecked or unsafe operations”
  48. possible lossy conversion from long to int?
  49. Convert String to int array in java
  50. eclipse won’t start – no java virtual machine was found
  51. What causes “‘void’ type not allowed here” error
  52. Variable might not have been initialized error
  53. Java substring: ‘string index out of range’
  54. throw checked Exceptions from mocks with Mockito
  55. How to sort an array of objects in Java?
  56. Android – SPAN_EXCLUSIVE_EXCLUSIVE spans cannot have a zero length
  57. keytool error Keystore was tampered with, or password was incorrect
  58. How to override toString() properly in Java?
  59. Returning null in a method whose signature says return int?
  60. Hibernate Error: a different object with the same identifier value was already associated with the session
  61. How to solve the “failed to lazily initialize a collection of role” Hibernate exception
  62. Initializing multiple variables to the same value in Java
  63. Java: Unresolved compilation problem
  64. FXML Load exception
  65. NullPointerExcetion Native Method Accessor… Hashing Words Issue
  66. How to convert currentTimeMillis to a date in Java?
  67. How to clear console in Java – Eclipse
  68. Java TreeMap Comparator
  69. What is the use of System.in.read()?
  70. Invalid escape sequence (valid ones are \b \t \n \f \r \” \’ \\ )
  71. JDK was not found on the computer for NetBeans 6.5
  72. In Java, how to assign the variable number=Integer.parseInt(args[0]) a value if no argument is passed?
  73. How are “mvn clean package” and “mvn clean install” different?
  74. Determine if a String is an Integer in Java [duplicate]
  75. How do I run Java .class files?
  76. Fill an array with random numbers [duplicate]
  77. Connection Java – MySQL : Public Key Retrieval is not allowed
  78. Whitespace Matching Regex – Java
  79. Size has private access in ArrayList
  80. Iterator for a linkedlist
  81. Hide Utility Class Constructor : Utility classes should not have a public or default constructor
  82. Android – Start service on boot
  83. JsonMappingException: No suitable constructor found for type [simple type, class ]: can not instantiate from JSON object
  84. Sending POST data in Android
  85. When is “java.io.IOException:Connection reset by peer” thrown?
  86. Java ArrayList of Doubles
  87. what is update-alternatives command in linux and what is the use of it?
  88. java: use StringBuilder to insert at the beginning
  89. Multiple delimiters in Scanner class of Java
  90. DTO and DAO concepts and MVC
  91. How to extract .war files in java? ZIP vs JAR
  92. What is the difference between run-time error and compiler error?
  93. What is the difference between ArrayList.clear() and ArrayList.removeAll()?
  94. Test if element is present using Selenium WebDriver?
  95. Increase heap size in Java
  96. android.content.res.Resources$NotFoundException: String resource ID #0x0
  97. what does x– or x++ do here?
  98. Class Declarations for temperature program in Java
  99. Is there a general string substitution function similar to sl4fj?
  100. Can’t seem to disable Java Automatic Update

Leave a Comment