映射01--[基本概念&&map set区别]

1.1基本概念

 

 1.2接口设计

 

 1.3Map与Set区别

 

 2.相关代码

Map

public interface Map<K, V> {
    int size();
    boolean isEmpty();
    void clear();
    V put(K key, V value);
    V get(K key);
    V remove(K key);
    boolean containsKey(K key);
    boolean containsValue(V value);
    void traversal(Visitor<K, V> visitor);
    
    public static abstract class Visitor<K, V> {
        boolean stop;
        public abstract boolean visit(K key, V value);
    }
}

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