TAILIEUCHUNG - Java C5. Exception Handling

Exceptional event Error that occurs during runtime Cause normal program flow to be disrupted Examples Divide by zero errors Accessing the elements of an array beyond its range Invalid input Hard disk crash Opening a nonexistent file Heap memory exhausted | Chapter 5. Exception Handling ITSS Java Programming CAO Tuan-Dung, HUT What is an exception? Exceptional event Error that occurs during runtime Cause normal program flow to be disrupted Examples Divide by zero errors Accessing the elements of an array beyond its range Invalid input Hard disk crash Opening a non-existent file Heap memory exhausted Example // divide by zero class DivByZero { public static void main(String args[]) { (3/0); (“Pls. print me.”); } } // array out of bound int array[] = new int[2]; array[0] = 1; array[1] = 2; array[2] = 3; // execute method of object that does not exist String s = null; (); Exception Object ArithmeticException Exception Object ArrayIndexOutOfBoundException Exception Object NullPointerException Default exception handling Displays this error message Exception in thread "main" : / by zero at () Default exception handler Provided

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