fix the java code: $//$ simulates a simple vending machine with operations to purchase drinks and check inventory.

public class VendingMachine $\{$

$//$ number of bottle in stock

private int bottles;

$//$ initial inventory is $20$

public VendingMachine$()\{$

bottles $=20$;

$\}$

public void purchase$($int amount$)\{$

bottles $=$ bottles $-$ amount;

$\}$

public int getInventory$()\{$

return bottles;

$\}$

public void restock$($int amount$)\{$

bottles $=$ bottles $+$ amount;

$\}$

public void report$()\{$

System.out.println$("$Inventory: $"+$ bottles $+"$ bottles"$)$;

$\}$

$\}$