// Set a custom block at coordinates (x,y,z) Block newBlock = MyCustomBlock.getBlock(); world.setBlockAndMetadataWithNotify(x, y, z, newBlock, 0);
// Remove block at coordinates (x,y,z) world.setBlockAndMetadataWithNotify(x, y, z, Blocks.air, 0);In both examples, the setBlockAndMetadataWithNotify() method is used to modify the world at a specific location. This method is commonly used by Minecraft modders to create custom content and adjust the base game.