Simple little question ~!

overdose

public void Methond (List list1, List list2) {
 if (list1.size> list2.size)
  {
   .........
  }
}

public void Methond (List list1, List list2) {
  int size1 = list1.size;
  int size2 = list2.size;
 if (size1> size2)
  {
   .........
  }
What is the difference between these two works?
}

carelee721

No difference

gaowei高伟

No difference

syg8698

What difference do you want it to have.

meisei

The only difference is the newly defined variable, which increases the overhead
Other things

hannah2222

The difference is different, but the if () statement has little effect here, because list1.size is used to traverse the list every time to get its size. If you repeatedly use the size attribute of list, it is best to First take it out and put it in the int variable. For example, if there is such a statement for (; list.size;) {} It is better to use the latter method

jjyhktc10

The difference is ...
There are two more int spaces in the memory

sindbad

4 bytes of memory are wasted. The former is released after the comparison, and the latter is released after the function is executed. I think it is not true to discuss this issue.

dunke0921

No difference

ccccccc

list1.size ==> list1.size()