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Exception Trapping (Java and Corel Paradox Cross Reference Guide)

By Mike Prestwood

Java versus Corel Paradox: A side by side comparison between Java and Corel Paradox.

 
Statements
 

Common statements such as if statements, loops, etc.

Exception Trapping

[Other Languages] 

Languages Focus

A common usage of exception handling is to obtain and use resources in a "try-it" block, deal with any exceptions in an "exceptions" block, and release the resources in some kind of "final" block which executes whether or not any exceptions are trapped.

Java:   try/catch/finally
Syntax Example:
try {
  /* Risky code here. */
}
catch (SomeException) {        //one or more.
  /* Recovery here. */
}
finally {                      //0 or one.
  /* Do something. */
}
Corel Paradox:   try...onFail

ObjectPAL has a try...onFail statement but does not have a finally-type component. However, the code afer endTry will execute.

try
onFail
endTry
Syntax Example:
var
i SmallInt
endVar
try
i = 0
i = 1/i
onFail
msgInfo("", "You cannot divide by zero.")
endTry












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