Java High Salary Road __002_ exception handling

Custom exceptions

1  Packagelearn. Javabasics.class;2 3 Importjava.util.Date;4 5 /**6 * How to customize an exception class7 * 1. Inherit an existing exception class8 * 2. Provide a serial number that provides several overloaded constructors9 * 3. Use as if it were an exceptionTen  */ One  Public classMyExceptionextendsRuntimeException { A     Private Static Final LongSerialversionuid = -1201746919629597153l; -  -      Publicmyexception () { the          -     } -      -      Publicmyexception (String msg) { +         Super(msg); -     } +      A      Public Static voidMain (String ... args) { at         Try { -             Throw NewMyException ("Error in my exception" +NewDate ()); -}Catch(Exception e) { -             //TODO auto-generated Catch block - e.printstacktrace (); -         } in     } -}

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In subclasses overriding the method of throwing exceptions to the parent class, the exception thrown in the subclass cannot be greater than the exception of the parent class, up to equal

Java.lang.Throwalbe |-----error : Errors, not processed in the program |----- Exception: Exception, which requires that the handling of these exceptions be considered when writing the program |---- Compile-time exceptions, exceptions that occur during compilation (an exception occurs when the Javac.exe command is executed) |----Run-time exception, an exception that occurs during run time (an exception occurs when the Java.exe command is executed)

Java High Salary Road __002_ exception handling