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   ► KBTo/From GuidesJavaStatements  Print This     

Cross Ref > Statements

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




If Statement

[Other Languages] 
Java:   if..else if..else

Syntax template:

if (expression) {
  expression1_true_code;
} else if (expression2) {
  expression2_true_code;
} else {
  otherwise_code;
}
Syntax Example:
if ((.1 + .1 + .1) == 0.3) {
  System.out.println("Correct");
} else {
  System.out.println("Not correct");
}
Corel Paradox:   If..Else..EndIf, or switch

ObjectPAL supports a simple If...Else...EndIf statement.

Notice ObjectPAL does not support an ElseIf feature as part of an if statement. Instead use a switch statement

Syntax Example:  
'Does ObjectPAL evaluate the math correctly? No!
If (.1 + .1 + .1) = .3 Then
  msgInfo("", "Correct")
Else
  msgInfo("", "Not correct")
EndIf
 
'Switch statement example.
switch
case x = "Nate": MsgInfo("", "Hi Nate")
case x = "Felicia": MsgInfo("", "Hi Felly")
  otherwise: MsgInfo("", "Who are you?")
endSwitch




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