Converting a Collection to An Array

[Joyjeet]

Hello, I am confused about the conversion while working in java. If anyone is having idea or any type of solution from which I can able to convert the collection to an array then please help me to achieve it. I will be thankful to you. So, please help me to achieve it.

[Katty]

Hello, I have got the code below, while converting a collection to an array you will need to make use of the code below:

import  java.util.List;
import java.util.ArrayList;
public class CollectionToArray
{
public static void main(String[] args)
{
List lst = new ArrayList();
lst.add("java");
lst.add("program");
lst.add("code");
lst.add("variable");
Object[] arr = lst.toArray();
for (int i = 0; i < arr.length; i++)
{
System.out.println(arr[i].toString());
}
}
}

[Zecho]

Hello, you can simply make use of the code below for converting a collection to an array:

Object[] obj = list.toArray(); 
MyClass[] arr = (MyClass[])list.toArray(new MyClass[list.size()]); 

obj = set.toArray(); 
arr = (MyClass[])set.toArray(new MyClass[set.size()]); 

obj = map.keySet().toArray();
arr = (MyClass[])map.keySet().toArray(new MyClass[set.size()]); 

obj = map.values().toArray(); 
arr = (MyClass[])map.values().toArray(new MyClass[set.size()]);

[Reegan]

Hello, If you use the code below then you will able to get the conversion of the collection to an array. So, you will able to get the solution for your problem:

import java.util.ArrayList;
import java.util.Collection;

public class convert {
  public static void main(String argarrS[]) {
    String str[] = { "one", "two", "three", "four", "five",
        "six", "seven", "eight", "nice" };
    Collection collection = new ArrayList();
    for (int i = 0, n = str.length; i < n; i++) {
      collection.add(str[i]);
    }
    String arrS[] = (String[]) collection.toArray(new String[0]);
    for (int i = 0, n = s.length; i < n; i++) {

      System.out.println(arrS[i]);
    }
    collection.remove(str[3]);
    System.out.println(str[1] + " " + collection.contains(str[1]));
    System.out.println(str[3] + " " + collection.contains(str[3]));
  }
}

[kelfro]

I am not having any knowledge for converting the collection to an array, but while searching on internet, I have got the following code, which will help you:

public coll GetWorkItemCollection(string str, int id, int num )
{
      coll workItems = TaskAPI.SearchTasks(WorkItem.WorkItemStatus.OnHold, str, id, num);

      return workItems;
}