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assignment

 
Greenhorn
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read the example
public class operat{
public static void main(String args[]){
int i=0;
int []a={3,7};
a[i]=i=9;
System.out.println(i + ""+a[0]+""+a[1]);
}
}
since = opearator is right associative,it shud move from right to left and give arrayindex out of bound.But it does not!!Kindly explain
 
Greenhorn
Posts: 17
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Hi Puneet
Well, i try to explain
Any exprseeion is sloved in two steps. They are
Step 1) First Recognise ALL the oprands in expression (moving from left to right)
Step 2) Then do the Operations (considering their prcedence and associativity)
So going through these Steps on ur expression, we have
Step 1) Recognise all operands moving from left to right
So, we have three operands
Operand # 1 = a[0] (a refernce to the 1st elemnet of array a)
Operand # 2 = i (simply a refernce to the variable)
Operand # 3 = 9 ( a constant value)
Step 2) Now the expression becomes a[0]=i=9
And the operation of assignment is done.
Thus giving NO out of Bound error
I hope this will help u
Bye

 
Greenhorn
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thanx naveed!!
u for clearing my doubt!!
 
Naveed Hassan
Greenhorn
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Well, I serached more and found the following justification
The precedence of [] is higher than =
So, [] will have to be solved first in the expression

 
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