Java Collection, ArrayList Exercises: Copy one array list into another
Java Collection, ArrayList Exercises: Exercise-9 with Solution
Write a Java program to copy one array list into another.
Sample Solution:-
Java Code:
import java.util.*;
public class Exercise9 {
public static void main(String[] args) {
List<String> List1 = new ArrayList<String>();
List1.add("1");
List1.add("2");
List1.add("3");
List1.add("4");
System.out.println("List1: " + List1);
List<String> List2 = new ArrayList<String>();
List2.add("A");
List2.add("B");
List2.add("C");
List2.add("D");
System.out.println("List2: " + List2);
// Copy List2 to List1
Collections.copy(List1, List2);
System.out.println("Copy List to List2,\nAfter copy:");
System.out.println("List1: " + List1);
System.out.println("List2: " + List2);
}
}
Sample Output:
List1: [1, 2, 3, 4] List2: [A, B, C, D] Copy List to List2, After copy: List1: [A, B, C, D] List2: [A, B, C, D]
Flowchart:
Java Code Editor:
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Previous: Sort a given array list.
Next: Shuffle elements in a array list.
What is the difficulty level of this exercise?
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Java: Tips of the Day
How to sort an ArrayList?
Collections.sort(testList); Collections.reverse(testList);
That will do what you want. Remember to import Collections though!
Ref: https://bit.ly/32urdSe
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