Bukkit

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package explosionphysics;

import java.util.ArrayList;
import org.bukkit.Bukkit;
import org.bukkit.Location;
import org.bukkit.Material;
import org.bukkit.World;
import org.bukkit.block.Block;
import org.bukkit.entity.FallingBlock;
import org.bukkit.event.Event;
import org.bukkit.event.EventHandler;
import org.bukkit.event.EventPriority;
import org.bukkit.event.Listener;
import org.bukkit.plugin.java.JavaPlugin;
import org.bukkit.util.Vector;

/**
 *
 * @author Taylor
 */
public class ExplosionPhysics extends JavaPlugin implements Listener{
	public ArrayList<Material> disallowedBlocks = new ArrayList<Material>();
	@Override
	public void onEnable(){
		getServer().getPluginManager().registerEvents(new ExplosionPhysics(), this);
		disallowedBlocks.clear();
		disallowedBlocks.add(Material.TNT);
		disallowedBlocks.add(Material.PISTON_BASE);
		disallowedBlocks.add(Material.PISTON_EXTENSION);
		disallowedBlocks.add(Material.PISTON_MOVING_PIECE);
		disallowedBlocks.add(Material.PISTON_STICKY_BASE);
	}

	@EventHandler(priority = EventPriority.NORMAL)
	public void onBlockExplode(org.bukkit.event.entity.EntityExplodeEvent e){
		if (e.isCancelled()){return;}
		if (e.blockList().isEmpty()){return;}
		e.setYield(0F);
		double x = 0;
		double y = 0;
		double z = 0;
		Location eLoc = e.getLocation();
		World w = eLoc.getWorld();
		for (int i = 0; i < e.blockList().size();i++){
			Block b = e.blockList().get(i);
			Location bLoc =b.getLocation();
			if (disallowedBlocks.contains(b.getType())){continue;}
			x = bLoc.getX() - eLoc.getX();
			y = bLoc.getY() - eLoc.getY() + .5;
			z = bLoc.getZ() - eLoc.getZ();
			FallingBlock fb = w.spawnFallingBlock(bLoc, b.getType(), (byte)b.getData());
			fb.setDropItem(false);
			fb.setVelocity(new Vector(x,y,z));
		}
		
	}
}