Error managing and exception handling in java

Error managing and exception handling in java

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  Error Management andExceptionHandling in JAVA 9/7/2018
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  OVERVIEW  Introduction toerror and theirtypes  Examples of errors  Introduction to exception and exception handling  Common java exceptions  Examples of exceptionhandling 9/7/2018
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  TYPES  Mistakes inprogram that leads to unsuccessful execution of program  May produce an incorrect output or may terminate the execution of program Types of error I. Compile time error o It won’t create .class file  Causes: omissing semicolons ouse of undeclared variables omisspelling of identifiers and keywords,etc 9/7/2018
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  II. Run timeerror o Program may compile successfully but doesn’t run correctly o It will create .class file o Causes: dividing an integer by zero,accessing an element out of the bound of an array, converting invalid string into number, etc 9/7/2018 I. INTRODUCTION TO ERROR AND ITS TYPES (CONTINUED)
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  II. EXAMPLES OFERRORS Example1: Compile Time error Example2: Run Time error Fig. Execution of Example1 program Fig. Execution of Example2 program 9/7/2018
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  III. INTRODUCTION TOEXCEPTION AND EXCEPTION HANDLING  Condition caused by a run time error in the program  Exception object created by java compiler when it encounters an error and throws it  If we want to continue execution of remaining code then the exception should be caught and show a user defined error message- known as exception handling Exceptions can be handled by following below procedures: 9/7/2018 HANDLE the exception CATCH the exception THROW the exception HIT the exception
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  IV. COMMON JAVAEXCEPTIONS 9/7/2018
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  V. EXAMPLES OFEXCEPTION HANDLING 9/7/2018 1:Try and catch for exception handling Output:
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  EXAMPLES OF EXCEPTIONHANDLING (CONTINUED) 9/7/2018 2:Using multiple catch blocks exception handling Output:
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  CONCLUSION Errorsarenormalforprogrammers-noprogram canbeexecutedsimplyinafirsttry… Exceptionhandlingmethods:usedinlarge programswherechancesofexceptionsarehuge! 9/7/2018
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  Thankyou...9/7/2018