ArrayList < Integer > arraylist = new ArrayList < Integer > ();

arraylist.add(10010);

arraylist.add(5);

arraylist.add(4);

arraylist.add(2);

for (int i = 0; i < arraylist.size(); i++) {

for (int j = arraylist.size() - 1; j > i; j--) {

if (arraylist.get(i) > arraylist.get(j)) {

int tmp = arraylist.get(i);

arraylist.get(i) = arraylist.get(i);

arraylist.get(j) = tmp;

}

}

}

for (int i: arraylist) {

System.out.println(i);

}

It is giving error while swapping, The LHS should be variable. I understand it.

Set method works here but I do not want to use.

Is there a way to do it without using set method?

Help is really appreciated.

解决方案

arraylist.get(i)= arraylist.get(i);

arraylist.get(j) =tmp;

You can't assign a value to a method call. As the compiler told you, the left hand side of an assignment must be a variable.

Use set method :

arraylist.set(i,arraylist.get(j));

arraylist.set(j,tmp);

Is there a way to do it without using set method?

No. Unless you wish to convert your ArrayList to an array, sort the array, and update the ArrayList with the sorted array.