Java tab Syntax Button Descriptions

{ ? }

Block statement.

A block statement or block is a sequence of statements and local variable declaration statements within braces.

See “Blocks and Statements” at

http://java.sun.com/docs/books/jls/third_edition/html/statements.html

return ?

Return statement.

Returns control to the evaluator of a complex expression block.

See “Branching Statements” at http://java.sun.com/docs/books/tutorial/java/nutsandbolts/branch.html

new ?

New operator. The operand represents the friendly data type or the fully qualified Java class name of the object to create.

Creates and allocates space for a new object.

if ( ? ) ?

If statement.

Conducts a conditional test and executes a block of statements if the test evaluates to true.

See “The if/else Statements” at http://java.sun.com/docs/books/tutorial/java/nutsandbolts/if.html

if ( ? ) ? else ?

If-else statement.

Conducts a conditional test and executes a block of statements if the test evaluates to true. Allows conditional execution of a statement or a conditional choice of two statements, executing one or the other but not both.

See “The if/else Statements” at http://java.sun.com/docs/books/tutorial/java/nutsandbolts/if.html

else ?

Else statement.

Executes a block of statements in the case that the test condition with the "if" keyword evaluates to false.

See “The if/else Statements” at http://java.sun.com/docs/books/tutorial/java/nutsandbolts/if.html

while ( ? ) ?

While statement.

Executes a Statement repeatedly until the value of the Expression is false. The Expression must have type Boolean, or a parse-time error occurs.

If the value of the Expression is false the first time it is evaluated, then the Statement is not executed.

See “The while and do-while Statements” at http://java.sun.com/docs/books/tutorial/java/nutsandbolts/while.html

do ? while ( ? )

Do-While statement.

Executes a Statement and an Expression repeatedly until the value of the Expression is false. The Expression must have type Boolean, or a parse-time error occurs.

Executing a do statement always executes the contained Statement at least once.

See “The while and do-while Statements” at http://java.sun.com/docs/books/tutorial/java/nutsandbolts/while.html

for ( ?. ?. ?) ?

For statement.

Executes some initialization code, then executes an Expression, a Statement, and some update code repeatedly until the value of the Expression is false.

See "The for Statement" at http://java.sun.com/docs/books/tutorial/java/nutsandbolts/for.html

break

Break statement.

Transfers control out of an enclosing statement.

See “Branching Statements” at http://java.sun.com/docs/books/tutorial/java/nutsandbolts/branch.html

continue

Continue statement.

Passes control to the loop-continuation point of an iteration statement. A continue statement may occur only in a while, do, or for statement; statements of these three kinds are called iteration statements.

See “Branching Statements” at http://java.sun.com/docs/books/tutorial/java/nutsandbolts/branch.html

switch ( ? ) { ? }

Switch statement.

The switch statement transfers control to one of several statements depending on the value of an expression.

The type of the Expression must be char, byte, short, int, BigInteger, float, double, BigDecimal, String, or Language, or a parse-time error occurs. This is an extension on the Java programming language where only the types char, byte, short, or int are supported.

String switch statements are case insensitive.

See “The switch Statement” at http://java.sun.com/docs/books/tutorial/java/nutsandbolts/switch.html

case ?:

Case statement.

A block of code or a code branch destinations depending on the value of an expression in a switch statement.

See “The switch Statement” at http://java.sun.com/docs/books/tutorial/java/nutsandbolts/switch.html

default:

Default statement.

Optionally used after all "case" conditions in a "switch" statement. If all "case" conditions are not matched by the value of the "switch" variable, the "default" statement is executed.

throw ?

Throw statement.

Causes an exception to be thrown. The result is an immediate transfer of control that may exit multiple statements and the complex expression block containing it until a try statement is found that catches the thrown value.

See “Method Throws” at http://java.sun.com/docs/books/jls/third_edition/html/classes.html#8.4.6

try { ? } catch (? ) { ? }

Try-catch statement.

A try statement executes a block. If a value is thrown and the try statement has one or more catch clauses that can catch it, then control is transferred to the first such catch clause.

See “Exception Handling Statements” at http://java.sun.com/docs/books/tutorial/java/nutsandbolts/exception.html

try { ? } finally { ? }

Try-finally statement.

If the try statement has a finally clause, then another block of code is executed, no matter whether the try block completes normally or abruptly, and no matter whether a catch clause is first given control.

See “Exception Handling Statements” at http://java.sun.com/docs/books/tutorial/java/nutsandbolts/exception.html

catch ( ? ) { ? }

Catch statement.

Encloses some code and is used to handle errors and exceptions that might occur in that code.

See “Exception Handling Statements” at http://java.sun.com/docs/books/tutorial/java/nutsandbolts/exception.html

finally { ? }

Finally statement.

Unconditionally executed after all other error processing has occurred. This guarantees execution of cleanup code when execution of a block of code is interrupted.

See “Exception Handling Statements” at http://java.sun.com/docs/books/tutorial/java/nutsandbolts/exception.html