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► KB ► To/From Guides ► Java ► Statements

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Cross Ref > Statements

By Mike Prestwood

Java versus C#: A side by side comparison between Java and C#.

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. */

C#: try...catch...finally

C# uses a try...catch...finally statement to trap for errors.

try {}

catch {}

finally {}

Syntax Example:

try
{
  int y = 0;
  y = 1 / y;
}
catch
{
  MessageBox.Show("you cannot divide by zero");
}

C# Exception Trapping (try...catch...finally)

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");
}

C#: if..else if..else

Use () around evaluation with no "then".

Syntax Example:

Boolean x = true;



if (x)
{
  MessageBox.Show("hello");
}
else if (x==false)
{
  MessageBox.Show("goodbye");
}

else

  MessageBox.Show("what?");
}