src/game/java/net/minecraft/world/Difficulty.java

package net.minecraft.world;

import java.util.function.IntFunction;
import javax.annotation.Nullable;
import net.minecraft.network.chat.Component;
import net.minecraft.util.ByIdMap;
import net.minecraft.util.StringRepresentable;

public enum Difficulty implements StringRepresentable {
    PEACEFUL(0, "peaceful"),
    EASY(1, "easy"),
    NORMAL(2, "normal"),
    HARD(3, "hard");

    public static final StringRepresentable.EnumCodec<Difficulty> CODEC = StringRepresentable.fromEnum(Difficulty::values);
    private static final IntFunction<Difficulty> BY_ID = ByIdMap.continuous(Difficulty::getId, values(), ByIdMap.OutOfBoundsStrategy.WRAP);
    private final int id;
    private final String key;

    private Difficulty(final int p_19026_, final String p_19027_) {
        this.id = p_19026_;
        this.key = p_19027_;
    }

    public int getId() {
        return this.id;
    }

    public Component getDisplayName() {
        return Component.translatable("options.difficulty." + this.key);
    }

    public Component getInfo() {
        return Component.translatable("options.difficulty." + this.key + ".info");
    }

    public static Difficulty byId(int p_19030_) {
        return BY_ID.apply(p_19030_);
    }

    @Nullable
    public static Difficulty byName(String p_19032_) {
        return CODEC.byName(p_19032_);
    }

    public String getKey() {
        return this.key;
    }

    @Override
    public String getSerializedName() {
        return this.key;
    }
}