Core Java with SCJP/ OCJP Notes By Durga Sir. Exception Handling. 1 DURGASOFT # 202
If we are passing different type of objects (heterogeneous object) our .equals() method should return false but not ClassCastException i.e. we have to handle
Within the same class we can't take 2 methods with the same signature otherwise we will get compile time error. Example: public void methodOne() { } public int
Core java interview questions by durga sir. Durga soft core java pdf. list = PLd3UqWTnYXOklywocjGz7Z02rqbLegX22 Generics: exception Handling: v ...
o Keywords for exception handling:(6) o Class related keywords:(6) o Object related keywords:(4) o Void return type keyword o Unused keywords.
Core Java with SCJP/ OCJP Notes By Durga Sir should be a valid enum constant otherwise we will get compile time error. Example: enum Beer.
Ex : 1. Increment & decrement operators we can apply only for variables but not for constant values.other wise we will get compile time error
In any java Program the 1st non comment statement should be package statement [if it is available] otherwise we will get compile time error. Example: import
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Exception handlingis the mechanism for dealing with such situations It is based on the “throw and catch” principle An exception is thrownwhen an error situa- tion occurs during program execution It is propagatedby the JVM and caughtby an excep- tion handlerthat takes an appropriate action to handlethe situation
Exception Handling 1 Introduction Exception handlingenables programs to handle some of the exceptional situations andcontinue with normal execution Exceptions are thrown from methods The calling methods can catch and handle exceptions or re-trow exceptions
Handling Exceptions • Exception handling is accomplished through: • The “try – catch” mechanism or • A “throws” clause in the method declaration • If you call any methods that throw a checked exception you must decide whether to handle the exception yourself or pass the exception “up the chain” to the calling method
Introduction to Exception Handling • Java library software (or programmer?defined code) provides a mechanism that signals when something unusual happens – This is called throwing an exception • In another place in the program the programmer must provide code that deals with the exceptional case
Exception handling •Exception handling separates error-handling code from normal programming tasks –Makes programs easier to read and to modify •The try block contains the code that is executed in normal circumstances •The catch block contains the code that is executed in exceptional circumstances
Exception handling •Exception handling separates error-handling code from normal programming tasks –Makes programs easier to read and to modify •The try block contains the code that is executed in normal circumstances •The catch block contains the code that is executed in exceptional circumstances
Example: Suppose our programming requirement is to read data from remote file locating at London At runtime if London file is not available then our program
Core Java with SCJP/ OCJP Notes By Durga Sir Language Fundamentals · 1 Instance variables 2 Static variables 3 · 2 Create and start Main Thread by JVM · 3
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Every Software Company considers your certification as assessment tool in JOB 1 Collection Framework 2 Exception Handling 3 Multi-Threading
Default exception handling in java; Exception class hierarchy (Credits : Notes are prepared by watching Durga sir's videos from DurgaSoft)
Notes of IT CSE 3rd Yr 2021 Java Programming Exception Handling pdf - Study Material Study Material Core Java Durga Sir class-12th Java