不使用.put方法添加到Hashtable（java）

Question

I wish to create the add method of Hashtable without implementing the Java api class or methods. This means that I have to add a value to a key in the Hashtable without using mytable.put(key,value). Could anyone kindly give me any idea how this can be done. Thanks alot.

Answer 1

This adds a value to a key without using mytable.put(key,value)

    Hashtable<Object, Object> myTable = new Hashtable<Object, Object>();
    for (Entry e : myTable.entrySet()) {
        if (e.getKey().equals(myKey) {
            e.setValue(myValue);
            break;
        }
    }

Answer 2

Use putAll() method..

Map<String, Object> map = ...; // wherever you get it from //Using Map or Hashtable 

Map<String, Object> toBeAdded = new HashMap<String, Object>();  

for (Map.Entry<String, Object> entry : map.entrySet()) {  
    // Determine if you need to add anything, add it to 'toBeAdded'  
}  

// Finally, add the new elements to the original map  
map.putAll(toBeAdded);