Java method to swap primitives
java, swap
Solution
You can't create a method swap, so that after calling `swap(x,y)` the values of x and y will be swapped. You could create such a method for mutable classes by swapping their contents¹, but this would not change their object identity and you could not define a general method for this.
You can however write a method that swaps two items in an array or list if that's what you want.
¹ For example you could create a swap method that takes two lists and after executing the method, list x will have the previous contents of list y and list y will have the previous contents of list x.
Problem
how do I make my swap function in java if there is no method by which we can pass by reference? Could somebody give me a code? ``` swap(int a, int b) { int temp = a; a = b; b = temp; } ``` But the changes wont be reflected back since java passes parameters by value.