src/hw3/task3/MyArrayList.java - hw_4 - Elyumusa/SberJavaCourseBeginner

src/hw3/task3/MyArrayList.java
96 строк2 KB
Elyumusa
Task 1, Task 2 and Task 3 completed
16 мар 2025, 20:37
16 мар 2025, 20:37f0eb974
package hw3.task3;

import java.util.Iterator;
import java.util.Spliterator;
import java.util.function.Consumer;

public class MyArrayList<T> implements Iterable<T> {
    @Override
    public Iterator<T> iterator() {
        return new MyArrayListIterator<>(this);
    }
    protected T[] data;
    private int length;
    public int size(){
        return length;
    }
    public MyArrayList(){
        data = (T[]) new Object[10];
        length = 0;
    }
    public void add(T element){
        if(length == data.length){
            T[] reinitialized= (T[]) new Object[data.length*2];
            for(int i=0;i <data.length;i++){
                reinitialized[i]=data[i];
            }
            data=reinitialized;
        }
        data[length]=element;
        length++;
    }
    public boolean contains(T element){
        if(length !=0){
            boolean contains=false;
            for(T el: data){
                if (el == element) {
                    contains = true;
                    break;
                }
            }
            return contains;
        }else{
            return false;
        }
    }
    public boolean remove(T element){
        boolean contains=false;
        if(length !=0){
            for(int i=0;i<data.length;i++){
                if (data[i] == element) {
                    data[i]=null;
                    contains=true;
                    break;
                }
            }
            return contains;
        }else{
            return false;
        }
    }
    @Override
    public Spliterator<T> spliterator() {
        return Iterable.super.spliterator();
    }

    @Override
    public void forEach(Consumer<? super T> action) {
        for(T el: this){
        action.accept(el);
        }
    }
    }


    class MyArrayListIterator<T> implements  Iterator<T>{
    MyArrayList<T> arrayList;
    public MyArrayListIterator(MyArrayList<T> arrayList){
        this.arrayList=arrayList;
    }
    private int currentIndex=0;

    @Override
    public boolean hasNext() {
        return currentIndex<arrayList.size();
    }

    @Override
    public T next() {
        return arrayList.data[currentIndex++];
    }

    @Override
    public void remove() {
        Iterator.super.remove();
    }
}