import java.util.ArrayList;
import java.util.Collections;
public class SwapElements {
public static void main(String[] args) {
// TODO Auto-generated method stub
ArrayList arrayList = new ArrayList();
arrayList.add("A");
arrayList.add("B");
arrayList.add("C");
arrayList.add("D");
arrayList.add("E");
System.out.println("Before swaping, ArrayList contains : " + arrayList);
Collections.swap(arrayList,0,4);
System.out.println("After swaping, ArrayList contains : " + arrayList);
}
}
Console：
Before swaping, ArrayList contains : [A, B, C, D, E]
After swaping, ArrayList contains : [E, B, C, D, A]
