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► KB ► To/From Guides ► VB.Net ► Statements

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Cross Ref > Statements

By Mike Prestwood

VB.Net versus Java: A side by side comparison between VB.Net and Java.

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.

VB.Net: Try...Catch...Finally

VB.Net uses a try...catch...finally statement to trap for errors.

Try
Catch
Finally
End Try

Syntax Example:

Try
  Dim y As Integer = 0
  y = 1 / y
Catch
  MessageBox.Show("you cannot divide by zero")

End Try

VB.Net Exception Trapping (Try...Catch...Finally) 1 certification question.

Java: try/catch/finally

Syntax Example:

try {

  /* Risky code here. */

catch (SomeException) {        //one or more.

  /* Recovery here. */

finally {                      //0 or one.

  /* Do something. */

If Statement

[Other Languages]

VB.Net: If..ElseIf..Else..End If

Same as VB classic.

Syntax Example: 1 certification question.

If x Then
  MessageBox.Show("hello")
ElseIf Not x Then
  MessageBox.Show("goodbye")
Else
  MessageBox.Show("what?")
End If

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");
}