pickup with key

i have this script (java) and i want it so i can pick it up / equip it with “f” please help

#pragma strict

private var survivalScript : GUISurvival;

function Start ()
{
survivalScript = GameObject.Find(“FPSController”).GetComponent(GUISurvival);
}

function OnTriggerEnter (Col : Collider)
{
if(Col.tag == “Player”)

{
	Destroy(gameObject);
	survivalScript.currentHunger += 10;
}

}

function OnTriggerEnter (Col : Collider) {
if(Col.tag == “Player”)

{
if(Input.GetKeyDown(KeyCode.f)){
Destroy(gameObject);
survivalScript.currentHunger += 10;
}

}
}