Answer to Question #307452 in Java | JSP | JSF for Malik Asim

Question

Create a class called OneDimArray then create a private generic array of type Object inside class, initialize array using constructor then implement the following methods inside class, then create a driver class called OneDimArrayTest for testing your program. Test your program with integers.

 

·        + Boolean addItem(item)

·        + Boolean addItemAt(index, item)

·        + Object removeItemAt(index)

·        + Object removeItem(index, item)

·        + Object deleteItemIfOdd(item)

·        + Boolean isEmpty()

·        + Boolean isFull()

·        + Object getItemAt(index)

·        + Boolean setItem(index, item)

·        + void swapItems(index1, index2)

Answer 1

OneDimArray.java

import java.util.*;


public class OneDimArray {
    
    private ArrayList<Object> array;
    
    public OneDimArray(){
      array = new ArrayList<Object>();
    }


    public Boolean addItem(Object item){
      return array.add(item);
    }


    public Boolean addItemAt(int index, Object item){
      try {
        array.add(index, item);
      } catch(Exception e) {
        System.out.println(e.getMessage());
        return false;
      }
      
      return true;
    }


    public Object removeItemAt(int index){
      Object o = array.get(index);
      array.remove(index);
      return o;
    }


    public Object removeItem(int index, Object item){
      array.remove(index);
      return item;
    }


    public Object deleteItemIfOdd(Object item){
      if(array.indexOf(item)%2 != 0) array.remove(item);
      return item;
    }


    public Boolean isEmpty(){
      if(array.size() == 0){
        return true;
      }
      return false;
    }


    public Boolean isFull(){
      if(array.size() != 0){
        return true;
      }
      return false;
    }


    public Object getItemAt(int index){
      return array.get(index);
    }


    public Boolean setItem(int index, Object item){
      try{
      array.set(index,item);
      }catch(Exception e){
        System.out.println(e.getMessage());
        return false;
      }
      return true;
    }


    public void swapItems(int index1, int index2){
      Object a = array.get(index1);
      Object b = array.get(index2);
      array.set(index1,b);
      array.set(index2,a);
    }


}

OneDimArrayTest.java

import java.util.*;


public class OneDimArrayTest {
  
    public static void main(String[] args) {
        OneDimArray test = new OneDimArray();
        
        System.out.println(test.addItem(10));
        System.out.println(test.addItem(20));
        System.out.println(test.addItem(30));
        System.out.println(test.addItem(40));
        
        System.out.println(test.addItemAt(3, 12));
        System.out.println(test.removeItemAt(0));
        System.out.println(test.removeItem(3, 100));
        System.out.println(test.deleteItemIfOdd(4));
        System.out.println(test.isEmpty());
        System.out.println(test.isFull());
        
        System.out.println(test.setItem(2, 220));
        
        
        test.swapItems(2, 1);
        System.out.println(test.getItemAt(2));
        System.out.println(test.getItemAt(1));
       
    }


    
}