gistfile1.java

public class PlayerDamageHistory {

	private String attacker;
	private Long time;
	
	public PlayerDamageHistory(String attacker, Long time) {
		this.attacker = attacker;
		this.time = time;
	}
	
	public void setAttacker(String attacker) {
		this.attacker = attacker;
	}
	
	public void setTime(Long time) {
		this.time = time;
	}
	
	public String getAttacker() {
		return this.attacker;
	}
	
	public Long getTime() {
		return this.time;
	}
}

//When player is hit
if (lastHit.containsKey(victim.getName())) {
	PlayerDamageHistory history = lastHit.get(victim.getName());
	history.setAttacker(attacker.getName());
	history.setTime(System.currentTimeMillis());
} else {
	lastHit.put(victim.getName(), new PlayerDamageHistory(attacker.getName(), System.currentTimeMillis()));
}

//When player gets knocked off
if (lastHit.get(player.getName()) != null) {
	PlayerDamageHistory history = lastHit.get(player.getName());
	if ((System.currentTimeMillis() - history.getTime()) < 15000){
		Player attacker = Bukkit.getPlayerExact(history.getAttacker());
		a.sendMessage(ChatColor.GREEN + player.getName() + ChatColor.GOLD + " was hit off the earth by " + ChatColor.GREEN +  attacker.getName() + ".");

		FishSlap run = ((FishSlap)a.getController());
		if (run != null) {
			run.addPoint(attacker, a);
		}
	} else {
		a.sendMessage(ChatColor.GREEN + player.getName() + ChatColor.GOLD + " fell off the earth.");
	}
	
} else {
	a.sendMessage(ChatColor.GREEN + player.getName() + ChatColor.GOLD + " fell off the earth.");
}