NullPointerException on getContents

I know that it throws a NPE because some stacks are air -> null. But I have no clue how to change that. Can anyone help me with that?

 

Code:java

if(player != null) { //maing sure the player is online
ItemStack[] contents = player.getContents();
ItemStack[] airlessContents;
ArrayList<ItemStack> isList = new ArrayList<>();
for(ItemStack is : contents) {
     if(is == null || is.getMaterial() == Material.AIR) {
        continue;     
} else {
     isList.add(is);
}
}
airlessContents = isList.toArray(new ItemStack[]);
}

 

beastman3226
Errors i got:
Line 6: The method getMaterial() is undefined for the type ItemStack
Line 12: Variable must provide either dimension expressions or an array initializer

 

You should be able to debug that yourself. But...
Try is.getType(). And do (new ItemStack[]{}) instead

 

Still throws a nullpoiterException at
inventory.getContents();

 

Show me your code please.