public MapEntry(Object key,
    Object value,
    boolean modifiable) 
{
                                        
        this.key = key;
        this.value = value;
        this.modifiable = modifiable;
}

Creates a map entry that can either allow modifications or not.

Parameters:

key - The entry key

value - The entry value

modifiable - Whether the entry should allow modification or not

 public boolean equals(Object o) 
{
        if (o != null && o instanceof Map.Entry) {
            Map.Entry entry = (Map.Entry)o;
            return (this.getKey() == null ?
                    entry.getKey() == null : this.getKey().equals(entry.getKey()))  &&
                   (this.getValue() == null ?
                    entry.getValue() == null : this.getValue().equals(entry.getValue()));
        }
        return false;
}

Determines if this entry is equal to the passed object.

 public Object getKey() 
{
        return key;
}

Gets the entry key.

 public Object getValue() 
{
        return value;
}

Gets the entry value.

 public int hashCode() 
{
        return (this.getKey() == null   ? 0 : this.getKey().hashCode()) ^
               (this.getValue() == null ? 0 : this.getValue().hashCode());
}

Returns the hashcode for this entry.

 public Object setValue(Object val) 
{
        if (modifiable) {
            Object oldVal = this.value;
            this.value = val;
            return oldVal;
        } else {
            throw new UnsupportedOperationException();
        }
}

Sets the entry value if the entry can be modified.