Hello. I nedd to write a method to merge two sorted array lists. I have created the array list and tried to write the method. I am not sure the method is correct. Also, I do not know how to call the method in the main method and print the new sorted array. Can you help? Thank you. This is what I have so far: import java.util.*; import java.util.ArrayList; public class lab628B { public static void main(String[] args) { ArrayList arr1 = new ArrayList(); arr1.add(1); arr1.add(4); arr1.add(9); arr1.add(16); arr1.add(21); arr1.add(33); arr1.add(41); arr1.add(52); System.out.println("Array 1" + arr1); ArrayList arr2 = new ArrayList(); arr2.add(4); arr2.add(7); arr2.add(9); arr2.add(9); arr2.add(20); arr2.add(25); arr2.add(27); System.out.println("Array 2" + arr2); } public static ArrayList mergeArrays(ArrayList a, ArrayList b) { ArrayList mergeArrays = new ArrayList<>(); merge.addAll(arr1); merge.addAll(arr2); Collections.sort(mergeArrays); return mergeArrays; } }
Hello. I nedd to write a method to merge two sorted array lists. I have created the array list and tried to write the method. I am not sure the method is correct. Also, I do not know how to call the method in the main method and print the new sorted array. Can you help? Thank you.
This is what I have so far:
import java.util.*;
import java.util.ArrayList;
public class lab628B
{
public static void main(String[] args)
{
ArrayList<Integer> arr1 = new ArrayList<Integer>();
arr1.add(1);
arr1.add(4);
arr1.add(9);
arr1.add(16);
arr1.add(21);
arr1.add(33);
arr1.add(41);
arr1.add(52);
System.out.println("Array 1" + arr1);
ArrayList<Integer> arr2 = new ArrayList<Integer>();
arr2.add(4);
arr2.add(7);
arr2.add(9);
arr2.add(9);
arr2.add(20);
arr2.add(25);
arr2.add(27);
System.out.println("Array 2" + arr2);
}
public static ArrayList mergeArrays(ArrayList a, ArrayList b)
{
ArrayList mergeArrays = new ArrayList<>();
merge.addAll(arr1);
merge.addAll(arr2);
Collections.sort(mergeArrays);
return mergeArrays;
}
}
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