Help with hashMaps

[Atijaf]

I have a hashMap that uses BlockPos as a key.

 

CODE

 

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public static HashMap<BlockPos, Boolean> currentRespawnLocs = new HashMap<BlockPos, Boolean(1000);

 

 

 

However, I would like to use the "get(object) function to obtain the Boolean that is inside, within my event handler...

 

The only way I know how to obtain a BlockPos is like so..

 

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new BlockPos(0,0,0);

or, BlockPos currentPos = event.pos;//inside my event handler

 

 

 

When using new, BlockPos is now consider an entirely new object and inside my hashMap, it doesn't exist.

 

Example:

 

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currentRespawnLocs.put(new BlockPos(0,0,0), true);

currentRespawnLocs.get(new BlockPos(0,0,0));//this returns null;

 

 

 

Does anyone know any work arounds or even a better way to implement this?

Thanks:)

[Anon10W1z]

You can create your own class that wraps around BlockPos. Override the equals and hashCode methods to return the proper values when the x, y, and z are the same.

[Jedispencer21]

Have you tried:

 

BlockPos pos = new BlockPos(0, 0, 0);

currentRespawnLocs.put(pos, true);

currentRespawnLocs.get(pos);

[Draco18s]

Long story short: BlockPos does not override Equals and HashCode, so it isn't (usefully) hashtableable.

 

  On 7/18/2015 at 2:29 AM, Jedispencer21 said:

Have you tried:

 

BlockPos pos = new BlockPos(0, 0, 0);

currentRespawnLocs.put(pos, true);

currentRespawnLocs.get(pos);

 

While this will return a value, this is not useful, because this fails:

 

BlockPos pos = new BlockPos(0, 0, 0);
currentRespawnLocs.put(pos, true);
pos = new BlockPos(0, 0, 0);
currentRespawnLocs.get(pos);

[Atijaf]

  On 7/18/2015 at 2:29 AM, Jedispencer21 said:

Have you tried:

 

BlockPos pos = new BlockPos(0, 0, 0);

currentRespawnLocs.put(pos, true);

currentRespawnLocs.get(pos);

 

This does work.  However, I acquire the blockPos position in the event.  In my main code, I declare the locations that I want to have as either a true or false output.

 

 

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//similar to this

//In my initialization method

currentRespawnLocs.put(new BlockPos(0,0,0), true);

 

//In my event handler

BlockPos currentLoc = event.pos;//the BlockPos x, y, and z are all equal to 0

currentRespawnLocs.get(currentLoc);//returns a null.

 

I may use an array of ints in the first method instead of blockPos.  Should work.

 

 

[Atijaf]

  On 7/18/2015 at 1:25 AM, Anon10W1z said:

Override the equals and hashCode methods to return the proper values when the x, y, and z are the same.

 

What do you mean by returning proper values?

 

I will have different x y and z values.  Hundreds actually.

[sham1]

  On 7/18/2015 at 6:29 AM, Atijaf said:

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Override the equals and hashCode methods to return the proper values when the x, y, and z are the same.

 

What do you mean by returning proper values?

 

I will have different x y and z values.  Hundreds actually.

 

Proper values as-in: hashCode returns the same int if BlockPos's x, y and z are the same and equals returns true if the x, y and z are all equal.

 

So basically, he wants you to create a hash-able wrapper around your BlockPos that you can then store on that hash map of yours.

[Atijaf]

Thanks:)

[Draco18s]

  On 7/18/2015 at 9:42 AM, diesieben07 said:

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Long story short: BlockPos does not override Equals and HashCode, so it isn't (usefully) hashtableable.

This is not true. Check Vec3i.

 

Sorry, I was basing off the fact that it didn't work (implying that BlockPos was not overriding those functions).