Code:
import java.util.Scanner;
import java.util.ArrayList;
/** class DynamicArray */
class DynamicArray
{
private ArrayList
/** constructor **/
public DynamicArray()
{
al = new ArrayList
}
/** function to clear **/
public void clear()
{
al.clear();
}
/** function to get size **/
public int size()
{
return al.size();
}
/** function to insert element **/
public void insert(String key)
{
al.add(key);
}
/** function to get element at index **/
public String get(int index)
{
if (index >= al.size())
return "";
return al.get(index);
}
/** function to remove element at index **/
public void remove(int index)
{
if (index >= al.size())
return ;
al.remove(index);
}
/** function to remove element **/
public void remove(String key)
{
al.remove(key);
}
/** function to display array **/
public void display()
{
System.out.println("\nDynamic Array : "+ al);
System.out.println();
}
}
/** Class DynamicArrayTest **/
public class DynamicArrayTest
{
public static void main(String[] args)
{
Scanner scan = new Scanner(System.in);
System.out.println("Dynamic Array Test\n");
DynamicArray da = new DynamicArray();
char ch;
/* Perform Dynamic Array operations */
do
{
System.out.println("\nDynamic Array\n");
System.out.println("1. insert ");
System.out.println("2. remove by index");
System.out.println("3. remove by val");
System.out.println("4. clear");
System.out.println("5. size");
int choice = scan.nextInt();
switch (choice)
{
case 1 :
System.out.println("Enter value to insert");
da.insert(scan.next() );
break;
case 2 :
System.out.println("Enter index");
da.remove(scan.nextInt() );
break;
case 3 :
System.out.println("Enter value");
da.remove(scan.next() );
break;
case 4 :
System.out.println("\nDynamic Array Cleared");
da.clear();
break;
case 5 :
System.out.println("\nSize = "+ da.size() );
break;
default :
System.out.println("Wrong Entry \n ");
break;
}
da.display();
System.out.println("\nDo you want to continue (Type y or n) \n");
ch = scan.next().charAt(0);
} while (ch == 'Y'|| ch == 'y');
}
}
Output:
Dynamic Array Test
Dynamic Array
1. insert
2. remove by index
3. remove by val
4. clear
5. size
1
Enter value to insert
apple
Dynamic Array : [apple]
Do you want to continue (Type y or n)
y
Dynamic Array
1. insert
2. remove by index
3. remove by val
4. clear
5. size
1
Enter value to insert
mango
Dynamic Array : [apple, mango]
Do you want to continue (Type y or n)
y
Dynamic Array
1. insert
2. remove by index
3. remove by val
4. clear
5. size
1
Enter value to insert
banana
Dynamic Array : [apple, mango, banana]
Do you want to continue (Type y or n)
y
Dynamic Array
1. insert
2. remove by index
3. remove by val
4. clear
5. size
1
Enter value to insert
strawberry
Dynamic Array : [apple, mango, banana, strawberry]
Do you want to continue (Type y or n)
y
Dynamic Array
1. insert
2. remove by index
3. remove by val
4. clear
5. size
5
Size = 4
Dynamic Array : [apple, mango, banana, strawberry]
Do you want to continue (Type y or n)
y
Dynamic Array
1. insert
2. remove by index
3. remove by val
4. clear
5. size
2
Enter index
2
Dynamic Array : [apple, mango, strawberry]
Do you want to continue (Type y or n)
y
Dynamic Array
1. insert
2. remove by index
3. remove by val
4. clear
5. size
3
Enter value
strawberry
Dynamic Array : [apple, mango]
Do you want to continue (Type y or n)
y
Dynamic Array
1. insert
2. remove by index
3. remove by val
4. clear
5. size
5
Size = 2
Dynamic Array : [apple, mango]
Do you want to continue (Type y or n)
y
Dynamic Array
1. insert
2. remove by index
3. remove by val
4. clear
5. size
4
Dynamic Array Cleared
Dynamic Array : []
Do you want to continue (Type y or n)
n
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