Solved cannot access org.bukkit.Material

I use intellij IDEA to write my code and use maven to compile it into a .jar file but when i compile this comes "cannot access org.bukkit.Material"
i use paper 1.17
the log from maven is :


[INFO]
[INFO] -----------------------< com.legendpro:OpBlocks >-----------------------
[INFO] Building OpBlocks 1.0-SNAPSHOT
[INFO] --------------------------------[ jar ]---------------------------------
[INFO]
[INFO] --- maven-clean-plugin:2.5:clean (default-clean) @ OpBlocks ---
[INFO] Deleting G:\programming\OpBlocks\target
[INFO]
[INFO] --- maven-resources-plugin:2.6:resources (default-resources) @ OpBlocks ---
[INFO] Using 'UTF-8' encoding to copy filtered resources.
[INFO] Copying 1 resource
[INFO]
[INFO] --- maven-compiler-plugin:3.8.1:compile (default-compile) @ OpBlocks ---
[INFO] Changes detected - recompiling the module!
[INFO] Compiling 6 source files to G:\programming\OpBlocks\target\classes
[INFO] -------------------------------------------------------------
[ERROR] COMPILATION ERROR :
[INFO] -------------------------------------------------------------
[ERROR] /G:/programming/OpBlocks/src/main/java/com/legendpro/opblocks/moreoredrops/IRON/irondrops.java:[3,18] cannot access org.bukkit.Material
bad class file: C:\Users\legendpro\.m2\repository\io\papermc\paper\paper-api\1.17.1-R0.1-SNAPSHOT\paper-api-1.17.1-R0.1-SNAPSHOT.jar(org/bukkit/Material.class)
class file has wrong version 60.0, should be 52.0
Please remove or make sure it appears in the correct subdirectory of the classpath.
[INFO] 1 error
[INFO] -------------------------------------------------------------

This is my main code

Code:

package com.legendpro.opblocks;

import com.legendpro.opblocks.moreoredrops.COPPER.copperdrops;
import com.legendpro.opblocks.moreoredrops.DIAMOND.diamondrops;
import com.legendpro.opblocks.moreoredrops.GOLD.golddrops;
import com.legendpro.opblocks.moreoredrops.IRON.irondrops;
import com.legendpro.opblocks.moreoredrops.NETHERITE.netheritedrops;
import org.bukkit.plugin.java.JavaPlugin;

public final class OpBlocks extends JavaPlugin {

    @Override
    public void onEnable() {
        // Plugin startup logic
        getServer().getPluginManager().registerEvents(new netheritedrops(), this);
        getServer().getPluginManager().registerEvents(new golddrops(), this);
        getServer().getPluginManager().registerEvents(new diamondrops(), this);
        getServer().getPluginManager().registerEvents(new copperdrops(), this);
        getServer().getPluginManager().registerEvents(new irondrops(), this);
        System.out.println("OpBlocks PLUGIN IS RUNNING");
    }

    @Override
    public void onDisable() {
        // Plugin shutdown logic
        System.out.println("OpBlocks PLUGIN IS SHUTTING DOWN");
    }
}

This is one of my listener classes:

Code:

package com.legendpro.opblocks.moreoredrops.IRON;

import org.bukkit.Material;
import org.bukkit.block.Block;
import org.bukkit.event.EventHandler;
import org.bukkit.event.Listener;
import org.bukkit.event.block.BlockBreakEvent;
import org.bukkit.inventory.ItemStack;

public class irondrops implements Listener {
    @EventHandler
    public void onPlayerBreakIronOre(BlockBreakEvent e) {
        Block ironoreBroken = e.getBlock();


        if (ironoreBroken.getType() == Material.IRON_ORE) {
            e.setCancelled(true);
            ironoreBroken.setType(Material.AIR);
            ItemStack ironingot = new ItemStack(Material.IRON_INGOT, 5);
            ironoreBroken.getWorld().dropItemNaturally(ironoreBroken.getLocation(), ironingot);
        }
    }
}

 

@LegendPro

The error tells you that it was a class file version mismatch.

Class file version 60.0 means Java 16, and class file version 52.0 means Java 8.
Note: You can get the version by subtracting by 44.

You can set the Java version in the pom.xml file.

 

nevermind i found it here : https://paper.readthedocs.io/en/latest/about/faq.html

i need to use java 16...


thanks for the help!