PrintWriter failing to print to file

You have to flush and / or close the file to get the data written to the disk.

Add out.close() in your code:

PrintWriter out = new PrintWriter(file);
for (int y=0; y<arr.length; y++){
    out.println(arr[y]);
}
out.close()

Related Posts:

  1. Problem with gif with transparent background
  2. Search for words with telephone numbers from 2-3-4 tree
  3. Difference between Inheritance and Composition
  4. What is the reason behind “non-static method cannot be referenced from a static context”? [duplicate]
  5. Java string to date conversion
  6. Creating a “logical exclusive or” operator in Java
  7. Cannot make a static reference to the non-static method fxn(int) from the type Two [duplicate]
  8. How can I use pointers in Java?
  9. JavaFX – Exception in Application start method?
  10. Int division: Why is the result of 1/3 == 0?
  11. Given final block not properly padded
  12. What is Parse/parsing?
  13. What is IllegalStateException?
  14. Long vs Integer, long vs int, what to use and when?
  15. Java Using Nodes with LinkedList
  16. When is the @JsonProperty property used and what is it used for?
  17. Why is there no SortedList in Java?
  18. Java returns error “Cannot instantiate the type”
  19. How does a Breadth-First Search work when looking for Shortest Path?
  20. Java: using switch statement with enum under subclass
  21. Java way to check if a string is palindrome
  22. No String-argument constructor/factory method to deserialize from String value (”)
  23. Where can i get BigClip? [closed]
  24. What is the /= operator in Java?
  25. Gradle does not find tools.jar
  26. Constructor cannot be applied to given types?
  27. How to execute a https GET request from java
  28. How to use VisibleForTesting for pure JUnit tests
  29. What is the easiest/best/most correct way to iterate through the characters of a string in Java?
  30. How can I list the available Cipher algorithms?
  31. ADK vs JDK vs SDK difference?
  32. round up to 2 decimal places in java?
  33. com.sun.jdi.InvocationException occurred invoking method
  34. How can I check whether an array is null / empty?
  35. How to solve javax.net.ssl.SSLHandshakeException Error?
  36. org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name ‘demoRestController’
  37. What causes java.lang.IncompatibleClassChangeError?
  38. Add an object to an Array of a custom class
  39. What does java.lang.Thread.interrupt() do?
  40. How to represent empty char in Java Character class
  41. Definition of a Java Container
  42. ‘Source code does not match the bytecode’ when debugging on a device
  43. Determining Day of the week using Zeller’s Congruence in Java
  44. IO Error: The Network Adapter could not establish the connection
  45. How to create a directory in Java?
  46. Converting from Integer, to BigInteger
  47. Get a resource using getResource()
  48. Java comparing generic types
  49. Simplest way to read JSON from a URL in Java
  50. Display Animated GIF
  51. How to calculate the intersection of two sets?
  52. method does not override method in its superclass
  53. Adding a timer to my program (javafx)
  54. How to resolve “Syntax error on token “else”” in Java?
  55. java.lang.IndexOutOfBoundsException: Index: 0, Size: 0 exception
  56. What does this expression language ${pageContext.request.contextPath} exactly do in JSP EL?
  57. Simulating Game of Craps in JAVA
  58. Creating random numbers with no duplicates
  59. How to create a popup window in javafx
  60. java – How to handle array:Exception in thread “main” java.lang.ArrayIndexOutOfBoundsException: 3
  61. How to print the data in byte array as characters?
  62. An established connection was aborted by the software in your host machine tomcat jackson
  63. Generate a random double in a range
  64. How to open a new tab using Selenium WebDriver in Java?
  65. Selenium Webdriver: Element Not Visible Exception
  66. Whitespace Matching Regex – Java
  67. Unreachable code in eclipse
  68. “Field can be converted to a local variable” message appearing when setting Android ActionBar colour
  69. Convert an integer to an array of digits
  70. Error: package or namespace load failed for ‘rJava’
  71. Difference between regex [A-z] and [a-zA-Z]
  72. How can I convert a char to CharSequence?
  73. Problems Generating A Math.random Number, Either 0 or 1
  74. Android Emulator: Unfortunately App has stopped
  75. Can we execute a java program without a main() method? [duplicate]
  76. How to really read text file from classpath in Java
  77. Java command not found on Linux
  78. Selenium using Java – The path to the driver executable must be set by the webdriver.gecko.driver system property
  79. How to break out or exit a method in Java?
  80. Java Exception in thread “AWT-EventQueue-0” java.lang.NullPointerException
  81. Failed to start component [StandardEngine[Catalina].StandardHost[localhost].StandardContext[/JDBC_DBO]]
  82. Can an int be null in Java?
  83. What’s the difference between HashSet and Set?
  84. Netbeans – Error: Could not find or load main class
  85. Eclipse IDE – Error: Build path specifies execution environment Java SE 1.7
  86. Why int[] a = new int[1] instead of just int a?
  87. ArithmeticException: “Non-terminating decimal expansion; no exact representable decimal result”
  88. When to use a Map instead of a List in Java?
  89. How do I replace a character in a string in Java?
  90. What’s so special about 0x7f?
  91. Append a single character to a string or char array in java?
  92. Preventing a Java class from being instantiated and inherited
  93. Collision Detection between two images in Java
  94. What does .pack() do?
  95. String is immutable. What exactly is the meaning?
  96. How do I autoindent in Netbeans?
  97. What is an attribute in Java?
  98. MessageBodyWriter not found for media type=application/json
  99. Conversion from Long to Double in Java
  100. Failed to find Java VM

Leave a Comment