classdataarray

/**
 * Class Data Array
 *
 * @afiqakraam
 * @24/03/2021
 */
class Person
{
    private String lastName;
    private String firstName;
    private int age;

    public Person(String last, String first, int a){
        lastName = last;
        firstName = first;
        age = a;
    }

    public void displayPerson(){
        System.out.println("Last name : "+lastName);
        System.out.println("First name : "+firstName);
        System.out.println("Age : "+age);
    }

    public String getLast(){
        return lastName;
    }
}
class ClassDataArray{
    private Person[] a;
    private int nElems;

    public ClassDataArray(int max){
        a = new Person[max];
        nElems = 0;
    }

    public Person find(String searchName){
        int j;
        for(j = 0; j < nElems; j++)
            if(a[j].getLast().equals(searchName))
            break;
        if(j == nElems)
            return null;
        else
            return a[j];
        }

    public void insert(String last,String first,int age){
        a[nElems] = new Person(last,first,age);
        nElems++;
    }

    public boolean delete(String searchName){
        int j;
        for(j = 0; j < nElems; j++)
            if(a[j].getLast().equals(searchName))
                break;

        if(j == nElems)
            return false;
        else{
            for(int k=j; k < nElems; k++)
                a[k] = a[k+1];
                nElems--;
            return true;
        }
    }

    public void displayA(){
        for(int j = 0; j < nElems; j++)
            a[j].displayPerson();
        }
    }

public class ClassDataApp{
    public static void main(String[] args){
        int maxSize = 100;
        ClassDataArray arr;
        arr = new ClassDataArray(maxSize);

        //Insert Elements
        arr.insert("Evans", "Patty", 24);
        arr.insert("Smith", "Loraine", 37);
        arr.insert("Yee", "Tom", 43);
        arr.insert("Adams", "Henry", 63);
        arr.insert("Hashimoto", "Sato", 21);
        arr.insert("Stimson", "Henry", 29);
        arr.insert("Velasquez", "Jose", 72);
        arr.insert("Lamarque", "Henry", 54);
        arr.insert("Vang", "Minh", 22);
        arr.insert("Creswell", "Lucinda", 18);

        //Display Elements
        arr.displayA();

        //Search Element
        String searchKey = "Stimson";
        Person found;
        found = arr.find(searchKey);
        if(found !=null){
            System.out.println("Found ");
            found.displayPerson();
        }
        else
            System.out.println("Can't find "+searchKey);

        //Delete Elements
        System.out.println("Deleting Smith, Yee, and Creswell");
        arr.delete("Smith");
        arr.delete("Yee");
        arr.delete("Creswell");

        //Display Elements
        arr.displayA();
    }
}