Why am I getting an error? What do I change to make it work? Consider an array of integers. We need to copy that array into an ArrayList, in reversed order. To do this, you need to complete the method, named copyReverse, in the class named Arrayops.java. There is only oneparameter to this method: the original array of integers. The method returns the new ArrayList, with the contents reversed in order from the original array.For example, consider the following array of integers:[3, 9, 27, 81]When you call the copyReverse method with this array, the return value should be a new ArrayList containing the same elements, but in reversed order:[81, 27, 9, 3]ArrayOps.java1 import java.util.ArrayList;3 public class Array0ps{/**This method goes through the array of integers identified bythe only parameter, creating a new ArrayList from the array,but in reverse order.3132 }@param theArray, an array of integers@return reversedArr, the new ArrayList of Integers*/public static ArrayList copyReverse (int[] anArray){// declare new ArrayList}ArrayList revArrayList = new ArrayList();// loop though anArray, in reverse,// storing each element in the ArrayListfor (int i = anArray.length - 1; i >= 0; i--) {revArrayList.add (anArray(i));}return revArrayList; Array0ps.java:24: error: cannot find symbolrevArrayList.add (anArray(i));symbol: method anArray (int)location: class Array0ps1 errorScore0

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Database System Concepts

7th Edition

ISBN:9780078022159

Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Chapter1: Introduction

Section: Chapter Questions

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Why am I getting an error? What do I change to make it work?

Consider an array of integers. We need to copy that array into an ArrayList, in reversed order. To do this, you need to complete the method, named copyReverse, in the class named Arrayops.java. There is only one
parameter to this method: the original array of integers. The method returns the new ArrayList, with the contents reversed in order from the original array.
For example, consider the following array of integers:
[3, 9, 27, 81]
When you call the copyReverse method with this array, the return value should be a new ArrayList containing the same elements, but in reversed order:
[81, 27, 9, 3]
ArrayOps.java
1 import java.util.ArrayList;
3 public class Array0ps
{
/**
This method goes through the array of integers identified by
the only parameter, creating a new ArrayList from the array,
but in reverse order.
31
32 }
@param theArray, an array of integers
@return reversedArr, the new ArrayList of Integers
*/
public static ArrayList copyReverse (int[] anArray)
{
// declare new ArrayList
}
ArrayList<Integer> revArrayList = new ArrayList<Integer>();
// loop though anArray, in reverse,
// storing each element in the ArrayList
for (int i = anArray.length - 1; i >= 0; i--) {
revArrayList.add (anArray(i));
}
return revArrayList;

Array0ps.java:24: error: cannot find symbol
revArrayList.add (anArray(i));
symbol: method anArray (int)
location: class Array0ps
1 error
Score
0

Expert Solution

Step 1

Here is that the update for you:

import java.util.ArrayList;

public class ArrayOps
technique goes through the array of integers best-known by
the only parameter, creating a innovative ArrayList from the array,
but in reverse order.
@param theArray, degree array of integers
@return reversedArr

*/
public static ArrayList copyReverse(int[] anArray)
though anArray, in reverse,
// storing each element inside the ArrayList
// your work here
for(int i = anArray.length-1; i >= 0; i++)
list.add(anArray[i]);
// return new ArrayList
// your work here
come list;
}
}

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