java.lang.ArrayIndexOutOfBoundsException: 0

Problem

This ArrayIndexOutOfBoundsException: 0 means that the index 0 is not a valid index for your array args[], which in turn means that your array is empty.

In this particular case of a main() method, it means that no argument was passed on to your program on the command line.

Possible solutions

  • If you’re running your program from the command line, don’t forget to pass 2 arguments in the command.
  • If you’re running your program in Eclipse, you should set the command line arguments in the run configuration. Go to Run > Run configurations... and then choose the Arguments tab for your run configuration and add some arguments in the program arguments area.

Note that you should handle the case where not enough arguments are given, with something like this at the beginning of your main method:

if (args.length < 2) {
    System.err.println("Not enough arguments received.");
    return;
}

This would fail gracefully instead of making your program crash.

Related Posts:

  1. How to fix array index out of bounds error?
  2. How to initialize an array in Java?
  3. Initialize part of an array in java
  4. What is the proper way to handle a NumberFormatException when it is expected?
  5. How do I declare and initialize an array in Java?
  6. Convert list to array in Java [duplicate]
  7. Sort an array in Java
  8. Exception in thread “main” java.util.NoSuchElementException
  9. What’s the simplest way to print a Java array?
  10. Explanation on Integer.MAX_VALUE and Integer.MIN_VALUE to find min and max value in an array
  11. What’s the simplest way to print a Java array?
  12. What causes a java.lang.ArrayIndexOutOfBoundsException and how do I prevent it?
  13. Converting array to list in Java
  14. Java Error “Exception in thread “main” java.util.InputMismatchException” On an Array program
  15. Java Error “Exception in thread “main” java.util.InputMismatchException” On an Array program
  16. Create ArrayList from array
  17. JavaFX – Exception in Application start method?
  18. JavaFX – Exception in Application start method? [duplicate]
  19. How to split a String by space
  20. Print ArrayList
  21. Print ArrayList
  22. Make copy of an array
  23. Given final block not properly padded
  24. What is an AssertionError? In which case should I throw it from my own code?
  25. How to create a sub array from another array in Java?
  26. EOFException – how to handle?
  27. Can I catch multiple Java exceptions in the same catch clause?
  28. Double array initialization in Java
  29. Exception in thread “main” java.util.NoSuchElementException: No line found
  30. Java – Best way to print 2D array?
  31. I want to declare an empty array in java and then I want do update it but the code is not working
  32. method in class cannot be applied to given types
  33. “NoClassDefFoundError: Could not initialize class” error
  34. unreported exception java.io.FileNotFoundException; must be caught or declared to be thrown
  35. How to convert an ArrayList containing Integers to primitive int array?
  36. Exception in thread “main” java.lang.UnsupportedClassVersionError: a (Unsupported major.minor version 51.0)
  37. “NoClassDefFoundError: Could not initialize class” error
  38. “NoClassDefFoundError: Could not initialize class” error
  39. Print ArrayList
  40. Convert array of strings into a string in Java
  41. How do I do a deep copy of a 2d array in Java?
  42. Returning an empty array
  43. Why do I get an UnsupportedOperationException when trying to remove an element from a List?
  44. How to create an empty array?
  45. Finding the max/min value in an array of primitives using Java
  46. Java – Best way to print 2D array?
  47. Why do I get “Exception; must be caught or declared to be thrown” when I try to compile my Java code?
  48. What is the difference between a null array and an empty array?
  49. method in class cannot be applied to given types
  50. Are arrays passed by value or passed by reference in Java?
  51. What is difference between Errors and Exceptions?
  52. How can I check whether an array is null / empty?
  53. Shifting array to the right – homework
  54. Add an object to an Array of a custom class
  55. what is Ljava.lang.String;@
  56. “Cannot create generic array of ..” – how to create an Array of Map?
  57. Convert String to int array in java
  58. “Actual or formal argument lists differs in length”
  59. Java substring: ‘string index out of range’
  60. Java Comparator class to sort arrays
  61. Resize an Array while keeping current elements in Java?
  62. List of Arrays in Java
  63. How to sort an array of objects in Java?
  64. local variables referenced from an inner class must be final or effectively final
  65. Bank Account Java Program
  66. Java, Shifting Elements in an Array
  67. Exception in thread “main” java.lang.ArithmeticException: / by zero
  68. Java can’t find file when running through Eclipse
  69. How to make an array of arrays in Java
  70. Empty an array in Java / processing
  71. Java, Simplified check if int array contains int
  72. Error: Generic Array Creation
  73. FXML Load exception
  74. java.lang.IndexOutOfBoundsException: Index: 0, Size: 0 exception
  75. java.lang.ArrayIndexOutOfBoundsException: 4 Error
  76. How to print the data in byte array as characters?
  77. Java read file and store text in an array
  78. (Java) Tic-Tac-Toe game using 2 dimensional Array
  79. int cannot be converted to int []
  80. Finding the size of a char array in Java
  81. Getting the array length of a 2D array in Java
  82. Get only part of an Array in Java?
  83. Checking to see if array is full
  84. How to use ArrayUtils for array of objects, it doesn’t delete the content of an array
  85. Error array dimension missing
  86. Printing char arrays in Java
  87. Fill an array with random numbers [duplicate]
  88. Connection Java – MySQL : Public Key Retrieval is not allowed
  89. Create a two dimensional string array anArray[2][2]
  90. Printing array elements with a for loop
  91. Throwing multiple exceptions in Java
  92. How do I convert this for loop into a while loop?
  93. How do I initialize a byte array in Java?
  94. How to increase the size of an array in Java?
  95. Official reasons for “Software caused connection abort: socket write error”
  96. How to get rows and columns count of a 2D array in Java?
  97. How can I read a text file in Android?
  98. Multidimensional Arrays lengths in Java
  99. Exception is never thrown in body of corresponding try statement
  100. How can I catch all the exceptions that will be thrown through reading and writing a file?

Leave a Comment