[1.10.2] [SOLVED] Errors that don't crash the game or do anything?

[Differentiation]

Hey!

So every time I run the Java Application (Minecraft Client), it gives me the following error which doesn't crash the game but concerns me a lot.

Error: https://pastebin.com/j0ane0J6

 

Is this important or do I just leave it?

Thanks!

 

Edited November 18, 2017 by Differentiation

[Alexiy]

Ignore them, it throws this exception because you aren't using registered username ("Player700" and alike).

Or you can specify your username and password in run configuration so it actually logs in.

[Differentiation]

Thanks!

Solved

[Draco18s]

For reference, that is an error that is trapped with a try...catch block. As there is a sensible thing to do in the event of failure, the error is printed to the console and the game moves on with its life. 

[Differentiation]

7 hours ago, Draco18s said:

For reference, that is an error that is trapped with a try...catch block. As there is a sensible thing to do in the event of failure, the error is printed to the console and the game moves on with its life. 

By the way, can you catch NullPointerException? Just curious. 

ItemStack stack = null;

try
{
    hoe.damageItem(1, playerIn);
}
catch (NullPointerException exception)
{
    System.out.println("NullPointerException caught!");
}

Edited November 19, 2017 by Differentiation

[Draco18s]

You can but it's easier to just check for null.

[Differentiation]

8 hours ago, Draco18s said:

You can but it's easier to just check for null.

Yeah... or just add the @Nonnull annotation

[Differentiation]

2 hours ago, diesieben07 said:

No, that's not what this annotation does.

Just about figured that out