A much simpler version of the Whole Application. Data structures

Simple

import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;
import org.apache.commons.lang3.ArrayUtils;
/*
NB You shall need the org.apache.commons library installed on your system.
Get it from here or run this http://github.com/olupotd/installApache.sh script 
like this if you are using Linux.
wget -c http://mirror.ucu.ac.ug/apache//commons/lang/binaries/commons-lang3-3.1-bin.tar.gz && tar -zxvf commons-lang3-3.1-bin.tar.gz
Go to your project properties and add it to them or just paste the jar files in your libs files in the Java Folder.
Good luck Assuming you already have eclipse installed.

*/
public class Simple {

	//declared an array of 
	Object[] orderedList = {20,45,51,78,84,91,98};
	int[] elems = {10,15,77,92,200};
	List<Integer> list = new ArrayList<Integer>();

	Object[] addElement(Object[] orderedList2, int added) {
		Object[] result = Arrays.copyOf(orderedList2, orderedList2.length +1);
		result[orderedList2.length] = added;
		return result;
	}


	public Simple() {
		for(int i = 0; i < elems.length; i++) 
			orderedList = addElement(orderedList, elems[i]);
		Arrays.sort(orderedList);
		viewList(orderedList);
		System.out.println("Removed Elements 45 and 91");
		orderedList =(Object[])ArrayUtils.removeElement(orderedList, 91);
		orderedList =(Object[])ArrayUtils.removeElement(orderedList, 45);
		viewList(orderedList);
		
	}

	private void viewList(Object[] orderedList2) {
		for(int x = 0; x<orderedList2.length; x++)
			{
			System.out.println(orderedList2[x]+"");
			}
	}
	 public static void main(String[] args) {
		
		 new Simple();

	 }

}