[移动开发]【数据结构】Set 集合

数据结构源码

接口

public interface Set<E> {

    void add(E e);

    void remove(E e);

    boolean contains(E e);

    int getSize();

    boolean isEmpty();
}

实现类

public class LinkedListSet<E> implements Set<E> {

    private LinkedList<E> list;

    public LinkedListSet() {
        list = new LinkedList<>();
    }

    @Override
    public void add(E e) {
        if (!list.contains(e)) {
            list.addFirst(e);
        }

    }

    @Override
    public void remove(E e) {
        list.removeElement(e);
    }

    @Override
    public boolean contains(E e) {
        return list.contains(e);
    }

    @Override
    public int getSize() {
        return list.getSize();
    }

    @Override
    public boolean isEmpty() {
        return list.isEmpty();
    }
}

数据结构拆解

维护字段和内部类

    private LinkedList<E> list;
    

构造函数

    public LinkedListSet() {
        list = new LinkedList<>();
    }

增

    @Override
    public void add(E e) {
        if (!list.contains(e)) {
            list.addFirst(e);
        }
    }

删

    @Override
    public void remove(E e) {
        list.removeElement(e);
    }

改

查

    @Override
    public boolean contains(E e) {
        return list.contains(e);
    }

    @Override
    public int getSize() {
        return list.getSize();
    }

    @Override
    public boolean isEmpty() {
        return list.isEmpty();
    }