Example Program For Unsupportedoperationexception In Java : Free Programs, Utilities and Apps11/29/2016
Java Exception Handling Tutorial With Examples and Code. Exception Handling in Java. Exceptions are used in Java Programming to handle errors and exceptional conditions. This tutorial describes about exception and how to use them. A program passes through compile time and run time. Exceptions are run time errors. Exception is an inbuilt class in the java. There are many sub classes of Exception class like Arithmetic. Exception, Nullpointer. Exception etc. Depending upon the nature of the problem occuring during run time, java creates the appropriate Exception object and throws it. For example: – int i = 1/0; . The following example shows the usage of java.util.Collections. Let us compile and run the above program. Exception in thread 'main' java.lang.UnsupportedOperationException Previous Page. Search Top APIs Top 16 Utility Classes Program Creek Simple. Java Code Examples for java.util.AbstractMap. Functionality tested in subclasses for example in java.util.HashMap. This is the reason why we should do the Exception handling by using our handlers. To handle we have to use try catch blocks. The lines of code that may throw some exception should be put in the try block and whatever we want our exception handlers to do should be put in to the catch block. And it will give a weird error message. Like,Exception in thread “main” java. Arithmetic. Exception: / by zeroat Exception. Depending upon the user’s input if different type of exception is occurring we need various type of catch block to handle them individually. If we go out of the range of the array an Arry. Index. Out. Of. Bound. Exceptionis thrown. Programs may have various type of exceptions which can be handled through multiple catch blocks. In this example third catch block is for general Exception type. So, can I just throw the UnsupportedOperationException?The general Exception catch block should be put at the end. Making your own exception sub class. There are some situations that is not exception for java but it is exception for our project requirement. For example if you want to run your program only when user gives commandline input (this is your program need which is not an exception for java itself.) so, this is the time when we manually create our own exception class. When we make this kind of exception it always extends the Exception class. The caller of the function has to put the try and catch blocks. Throws keyword is for delegating the exception handling mechanism to the caller of the function. If we try to throw unchecked exception inside a function we don’t need to put try and catch block nor the throws. Checked exceptions are those exceptions that can’t handle by java’s default exception handlers. When a checked exception is thrown from inside a function we are bound to put the try and catch block or the throws declaration. The difference between throw and throws: -Throw is used to manually throw exception. If the definer don’t want to handle the exception using try and catch block than definer use throws keyword to indicate the caller that you must need to put try and catch block when you call the function. In this case definer delegates the work to the caller to put try and catch. So, if definer used more than 1 exceptions after throws keyword than caller is supposed to use corresponding catch block when function is being called. All the custom exceptions are checked exception but there are also some inbuilt exception classes that are also checked. List of checked exception. Class. Not. Found. Exception Class not found. Clone. Not. Supported. Exception Attempt to clone an object that does not implement the Cloneable interface. Illegal. Access. Exception Access to a class is denied. Instantiation. Exception Attempt to create an object of an abstract class or interface. Interrupted. Exception One thread has been interrupted by another thread. No. Such. Field. Exception A requested field does not exist. No. Such. Method. Exception A requested method does not exist. List of unchecked exception. Arithmetic. Exception Arithmetic error, such as divide- by- zero. Array. Index. Out. Of. Bounds. Exception Array index is out- of- bounds. Array. Store. Exception Assignment to an array element of an incompatible type. Class. Cast. Exception Invalid cast. Illegal. Argument. Exception Illegal argument used to invoke a method. Illegal. Monitor. State. Exception Illegal monitor operation, such as waiting on an unlocked thread. Illegal. State. Exception Environment or application is in incorrect state. Illegal. Thread. State. Exception Requested operation not compatible with current thread state. Index. Out. Of. Bounds. Exception Some type of index is out- of- bounds. Negative. Array. Size. Exception Array created with a negative size. Null. Pointer. Exception Invalid use of a null reference. Number. Format. Exception Invalid conversion of a string to a numeric format. Security. Exception Attempt to violate security. String. Index. Out. Of. Bounds Attempt to index outside the bounds of a string. Unsupported. Operation. Exception An unsupported operation was encountered. This is because the Arrays. List () returns java. Arrays$Array. List, not Array. List. Arrays$Array. List and Array. List are the successor to the Abstract. List, remove, add, method in Abstract. List is the default throw Unsupported. Operation. Exception and do not make any operation. Array. List override these method to operate on list, Arrays$Array. List but not remove (override), add (), so throw Unsupported. Operation. Exception.
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