Java Error Codes

ArithmeticException Java Programming Language An ArithmeticException means your code tried to do a math operation that is not … ArrayIndexOutOfBoundsException Java Programming Language An ArrayIndexOutOfBoundsException means your code tried to access a position in … AssertionError Java Programming Language AssertionError is thrown when a Java assert statement fails. An assert statement … ClassCastException Java Programming Language A ClassCastException means your code tried to treat an object as a type it is … ClassNotFoundException Java Programming Language A ClassNotFoundException means Java tried to load a class by name at runtime but … CloneNotSupportedException Java Programming Language CloneNotSupportedException is thrown when you try to clone an object that has … ConcurrentModificationException Java Programming Language A ConcurrentModificationException means your code tried to change a collection … ConnectException Java Programming Language A ConnectException with the message 'Connection refused' means your Java program … EnumConstantNotPresentException Java Programming Language EnumConstantNotPresentException is thrown when code tries to look up an enum … FileNotFoundException Java Programming Language A FileNotFoundException means Java looked for a file at the path you gave it and … IllegalArgumentException Java Programming Language An IllegalArgumentException means a method received an argument value that is … IllegalStateException Java Programming Language An IllegalStateException means you called a method at the wrong time — the … InputMismatchException Java Programming Language InputMismatchException is thrown by the Scanner class when the input it reads … InterruptedException Java Programming Language An InterruptedException means a thread that was paused (sleeping, waiting, or … IOException Java Programming Language An IOException means something went wrong when your program tried to read or … NegativeArraySizeException Java Programming Language NegativeArraySizeException is thrown when you try to create an array with a … NoClassDefFoundError Java Programming Language A NoClassDefFoundError means a class was present when your code was compiled, … NoSuchMethodError Java Programming Language A NoSuchMethodError means Java found the class it was looking for, but the … NullPointerException Java Programming Language A NullPointerException means your code tried to use an object that has no value … NumberFormatException Java Programming Language A NumberFormatException means Java tried to convert a String into a number but … OutOfMemoryError Java Programming Language An OutOfMemoryError means the Java Virtual Machine (JVM) ran out of memory and … RuntimeException Java Programming Language RuntimeException is the parent class for all unchecked exceptions in Java — the … SocketException Java Programming Language A SocketException means something went wrong with a network connection at the … StackOverflowError Java Programming Language A StackOverflowError means a method kept calling itself (or other methods) in an … StringIndexOutOfBoundsException Java Programming Language A StringIndexOutOfBoundsException means your code tried to access a character … TimeoutException Java Programming Language TimeoutException is thrown when an operation takes longer than the maximum time … UnsupportedOperationException Java Programming Language An UnsupportedOperationException means you tried to do something that the object … VerifyError Java Programming Language VerifyError is thrown by the Java Virtual Machine when it finds that compiled …