JAVA

Array list deep copy

 
public class CloneArrayListMain {
 
    public static void main(String[] args) {
        ArrayList<Student> studentList = new ArrayList<>();
        studentList.add(new Student("Rohan","102",new Date(2002, 02, 12)));
        studentList.add(new Student("David","105",new Date(1999, 05, 30)));
 
        ArrayList<Student> clonedStudentList = new ArrayList<>();
 
        for(Student st:studentList)
        {
            clonedStudentList.add(st.clone());
        }
        // Update list
        clonedStudentList.get(0).setName("John");
        System.out.println("-----------Original List-----------");
        studentList.forEach(e->System.out.println(e.getName()+" "+e.getId()));
        System.out.println("-----------Copied List----------");
        clonedStudentList.forEach(e->System.out.println(e.getName()+" "+e.getId()));
    }
}
 

Array list deep copy

ArrayList clone() example
import java.util.ArrayList;
 
public class ArrayListExample 
{
    @SuppressWarnings("unchecked")
    public static void main(String[] args) 
    {
        ArrayList<String> arrayListObject = new ArrayList<>(); 
         
        arrayListObject.add("A");
        arrayListObject.add("B");
        arrayListObject.add("C");
        arrayListObject.add("D");
         
        System.out.println(arrayListObject);   
         
        ArrayList<String> arrayListClone =  (ArrayList<String>) arrayListObject.clone();
         
        System.out.println(arrayListClone);   
    }
}