copy arraylist java
List<Something> original=new ArrayList<>(); //insert elements List<Something> copy=new ArrayList<>(original);//create copy here System.out.println(copy.equals(original));//true because the copy has the same elements System.out.println(copy==original);//false because it is another List
ArrayList clone() method in java
import java.util.ArrayList; public class ArrayListCloneMethodExample { public static void main(String[] args) { ArrayList<String> al = new ArrayList<String>(); al.add("violet"); al.add("indigo"); al.add("blue"); al.add("green"); al.add("yellow"); System.out.println("ArrayList before using clone() method: " + al); // create another ArrayList and copy ArrayList<String> arrClone = new ArrayList<String>(); arrClone = (ArrayList)al.clone(); System.out.println("ArrayList after using clone() method: " + arrClone); } }
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