15.25.1

Simple Assignment Operator

=

EXPRESSIONS

for the same reason; the right hand operand is not evaluated and no assign 

ment occurs.

Otherwise, the right hand operand is evaluated. If this evaluation completes

abruptly, then the assignment expression completes abruptly for the same rea 

son and no assignment occurs.

Otherwise, the value of the right hand operand is converted to the type of the

left hand variable and the result of the conversion is stored into the variable.

If the left hand operand expression is an array access expression ( 15.12), then

many steps are required:

First, the array reference subexpression of the left hand operand array access

expression is evaluated. If this evaluation completes abruptly, then the assign 

ment expression completes abruptly for the same reason; the index subexpres 

sion (of the left hand operand array access expression) and the right hand

operand are not evaluated and no assignment occurs.

Otherwise, the index subexpression of the left hand operand array access

expression is evaluated. If this evaluation completes abruptly, then the assign 

ment expression completes abruptly for the same reason and the right hand

operand is not evaluated and no assignment occurs.

Otherwise, the right hand operand is evaluated. If this evaluation completes

abruptly, then the assignment expression completes abruptly for the same rea 

son and no assignment occurs.

Otherwise, if the value of the array reference subexpression is

null

, then no

assignment occurs and a

NullPointerException

is thrown.

Otherwise, the value of the array reference subexpression indeed refers to an

array. If the value of the index subexpression is less than zero, or greater

than or equal to the length of the array, then no assignment occurs and an

IndexOutOfBoundsException

is thrown.

Otherwise, the value of the index subexpression is used to select a component

of the array referred to by the value of the array reference subexpression. This

component is a variable; call its type

SC

. Also, let

TC

 be the type of the left 

hand operand of the assignment operator as determined at compile time.

N

If

TC

 is a primitive type, then

SC

 is necessarily the same as

TC

. The value of

the right hand operand is converted to a value of type

TC

 and stored into the

selected array component.

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