diff --git a/.gitignore b/.gitignore
index 409eeab..fcbc7bc 100644
--- a/.gitignore
+++ b/.gitignore
@@ -8,3 +8,6 @@ out/
 
 ### VS Code ###
 .vscode/
+
+### kotlin ###
+.kotlin/
diff --git a/CHANGES.md b/CHANGES.md
new file mode 100644
index 0000000..d4f7295
--- /dev/null
+++ b/CHANGES.md
@@ -0,0 +1,22 @@
+# 版本更新 (3.0.0开始算起)：
+
+### 3.3.0 - 更新
+ - 修改了部分代码
+ - `get(String)Lio/github/xiefrish2021/api/ITag`方法修改成 `get(String)Lio/github/xiefrish2021/compound/NBTElement`
+ - 添加了一些kotlin成分：如委托，语法糖
+
+#### 3.2.0 - 更新
+ - 删除或合并了一些不必要的接口
+ - `NBT.newInstance()`用法更改为 `NBT.getInstance()`
+
+#### 3.1.0 - 更新
+ - 修改了SNBTReader里面readArray的会报unchecked的某条代码
+ - 把Compound，Array<V extends ITag>等等的接口迁移到了`xyz.frish2021.nbt.api`包
+ - 修改了NBT类的基本用法由`new NBT()` 修改成`NBT.newInstance()` 并且添加了单例模式
+ - `NBT.newInstance()` 添加了synchronized关键字以防止多次初始化影响线程安全
+ - 修复了生成IntArray和ByteArray的SNBT却生成成了List的SNBT。
+
+#### 3.0.0 - 更新
+ - 重写了库的代码
+ - 允许通过Compound实例生成SNBT
+ -
diff --git a/README.md b/README.md
index 1c8e8b5..04fbead 100644
--- a/README.md
+++ b/README.md
@@ -2,11 +2,7 @@
 
 NBT(全称：二进制命名标签(`N`amed`B`inary `T`ags))\
 是Minecraft游戏存档及一些游戏数据的存储格式。\
-作者：Frish2021
-
-## (0) 3.2.0版本 - 更新内容
- - 删除或合并了一些不必要的接口
- - `NBT.newInstance()`用法更改为 `NBT.getInstance()`
+版本更新：[CHANGES.md](CHANGES.md)
 
 ## (1) 用法
 Maven
@@ -92,19 +88,53 @@ public class NBTest {
 
 ### 读操作(NBT)
 #### 源码
+java
+
 ```java
 public class NBTest {
     public static void main(String[] args) {
         NBT nbt = new NBT.getInstance();
-        File output = new File("你要读取的NBT文件");
-        
-        CompoundTag compound = nbt.readUnnamedNBT(output);
-        System.out.println(compound.getString("test"));
-        System.out.println(compound.getCompound("test1").getInt("test3"));
+
+        try (InputStream is = new FileInputStream("你要读取的NBT文件")) {
+            CompoundTag compound = nbt.readUnnamedNBT(is);
+            System.out.println(compound.getString("test"));
+            System.out.println(compound.getCompound("test1").getInt("test3"));
+        } catch (Exception e) {
+            throw new RuntimeException(e);
+        }
     }
 }
 ```
 
+kotlin (通过`compound[key]`方法)
+
+```kotlin
+fun main() {
+    val nbt = NBT.getInstance()
+    val compound = nbt.readUnnamedNBT(FileOutputStream("你要读取的NBT文件"))
+    
+    println(compound["test"].asString());
+    println(compound["test1"].asCompound()["test3"].asInt());
+}
+```
+
+kotlin (通过委托方法)
+
+```kotlin
+fun main() {
+    val nbt = NBT.getInstance()
+    val compound = nbt.readUnnamedNBT(FileOutputStream("你要读取的NBT文件"))
+    
+    val test: NBTElement by compound
+    
+    val test1: NBTElement by compound
+    val test3: NBTElement by test1.asCompound()
+    
+    println(test.asString());
+    println(test3.asInt());
+}
+```
+
 被读取的NBT文件类容
 ```nbtt
 "": {
@@ -125,6 +155,7 @@ Frish2021
 
 ### 读操作(SNBT)
 #### 源码
+java
 ```java
 public class NBTest {
     public static void main(String[] args) {
@@ -136,14 +167,17 @@ public class NBTest {
 }
 ```
 
+kotlin 同理
+
 #### 效果
 控制台输出
 ```
 Frish2021
 ```
 
-### 新特性 - 生成SNBT
+### 生成SNBT
 #### 源码
+java
 ```java
 public class NBTest {
     public static void main(String[] args) {
@@ -161,6 +195,7 @@ public class NBTest {
     }
 }
 ```
+kotlin同理
 
 #### 效果
 控制台输出
@@ -174,17 +209,6 @@ public class NBTest {
 邮件：`1573880184@qq.com`
 如果有BUG，请发布Issues.
 
-## (3) 历史更新 (3.0.0开始算起)：
-#### 3.0.0 - 更新
- - 重写了库的代码
- - 允许通过Compound实例生成SNBT
-#### 3.1.0 - 更新
- - 修改了SNBTReader里面readArray的会报unchecked的某条代码
- - 把Compound，Array<V extends ITag>等等的接口迁移到了`xyz.frish2021.nbt.api`包
- - 修改了NBT类的基本用法由`new NBT()` 修改成`NBT.newInstance()` 并且添加了单例模式
- - `NBT.newInstance()` 添加了synchronized关键字以防止多次初始化影响线程安全
- - 修复了生成IntArray和ByteArray的SNBT却生成成了List的SNBT。
-
-## (4) 最后
+## (3) 最后
 该NBT库的其他用法就靠你自己发掘把 :)\
 那些比如IntArray，ByteArray，List可以自己看test模块或者源码。
diff --git a/build.gradle.kts b/build.gradle.kts
index dbed9c0..3517b45 100644
--- a/build.gradle.kts
+++ b/build.gradle.kts
@@ -1,11 +1,12 @@
 plugins {
     id("java")
     id("maven-publish")
+    kotlin("jvm") version "2.0.0"
     id("com.github.johnrengelman.shadow") version "8.1.1"
 }
 
 group = "io.github.xiefrish2021"
-version = "3.2.0"
+version = "3.3.0"
 
 repositories {
     mavenCentral()
diff --git a/settings.gradle.kts b/settings.gradle.kts
index 9bc65df..af9be77 100644
--- a/settings.gradle.kts
+++ b/settings.gradle.kts
@@ -1,2 +1,10 @@
+pluginManagement {
+    repositories {
+        gradlePluginPortal()
+        mavenCentral()
+        mavenLocal()
+    }
+}
+
 rootProject.name = "NBT"
 
diff --git a/src/main/java/io/github/xiefrish2021/api/Compound.java b/src/main/java/io/github/xiefrish2021/api/Compound.java
index 05e1d39..33d1a7e 100644
--- a/src/main/java/io/github/xiefrish2021/api/Compound.java
+++ b/src/main/java/io/github/xiefrish2021/api/Compound.java
@@ -1,12 +1,8 @@
 package io.github.xiefrish2021.api;
 
-import io.github.xiefrish2021.array.ByteArrayTag;
-import io.github.xiefrish2021.array.IntArrayTag;
-import io.github.xiefrish2021.array.LongArrayTag;
-import io.github.xiefrish2021.compound.CompoundTag;
-import io.github.xiefrish2021.primitive.PrimitiveTag;
+import io.github.xiefrish2021.compound.Getter;
 
-public interface Compound extends Iterable<Compound.Entry>, ITag {
+public interface Compound extends Iterable<Compound.Entry>, ITag, Getter {
     Compound put(String key, ITag value);
 
     Compound putAll(Compound compound);
@@ -29,36 +25,6 @@ public interface Compound extends Iterable<Compound.Entry>, ITag {
 
     int size();
 
-    ITag get(String key);
-
-    ITag get(String key, ITag defaultValue);
-
-    <V> PrimitiveTag<V> getPrimitive(String key);
-
-    String getString(String key);
-
-    int getInt(String key);
-
-    float getFloat(String key);
-
-    double getDouble(String key);
-
-    byte getByte(String key);
-
-    long getLong(String key);
-
-    short getShort(String key);
-
-    <V extends ITag> List<V> getList(String key);
-
-    ByteArrayTag getByteArray(String key);
-
-    IntArrayTag getIntArray(String key);
-
-    LongArrayTag getLongArray(String key);
-
-    CompoundTag getCompound(String key);
-
     interface Entry {
         String key();
 
diff --git a/src/main/java/io/github/xiefrish2021/compound/CompoundTag.java b/src/main/java/io/github/xiefrish2021/compound/CompoundTag.java
index 53e6845..bc210f2 100644
--- a/src/main/java/io/github/xiefrish2021/compound/CompoundTag.java
+++ b/src/main/java/io/github/xiefrish2021/compound/CompoundTag.java
@@ -1,15 +1,11 @@
 package io.github.xiefrish2021.compound;
 
-import io.github.xiefrish2021.primitive.number.*;
+import kotlin.reflect.KProperty;
 import org.jetbrains.annotations.NotNull;
 import io.github.xiefrish2021.api.Compound;
-import io.github.xiefrish2021.array.ByteArrayTag;
-import io.github.xiefrish2021.array.IntArrayTag;
-import io.github.xiefrish2021.array.LongArrayTag;
-import io.github.xiefrish2021.primitive.PrimitiveTag;
-import io.github.xiefrish2021.primitive.StringTag;
 import io.github.xiefrish2021.api.ITag;
 import io.github.xiefrish2021.tag.TagType;
+import org.jetbrains.annotations.Nullable;
 
 import java.util.*;
 import java.util.function.Consumer;
@@ -76,13 +72,13 @@ public ITag value() {
     }
 
     @Override
-    public Compound put(String key, ITag value) {
+    public @NotNull Compound put(@NotNull String key, @NotNull ITag value) {
         compounds.put(key, value);
         return this;
     }
 
     @Override
-    public Compound putAll(Compound compound) {
+    public @NotNull Compound putAll(@NotNull Compound compound) {
         for (Entry entry : this) {
             if (compound.containsKey(entry.key())) {
                 replace(entry.key(), entry.value());
@@ -96,7 +92,7 @@ public Compound putAll(Compound compound) {
 
     @Override
     public Compound remove(String key) {
-        this.remove(key, get(key));
+        this.remove(key, get(key).asTag());
         return this;
     }
 
@@ -114,85 +110,18 @@ public Compound replace(String key, ITag oldValue, ITag newValue) {
 
     @Override
     public Compound replace(String key, ITag newValue) {
-        this.replace(key, get(key), newValue);
+        this.replace(key, get(key).asTag(), newValue);
         return this;
     }
 
     @Override
-    public ITag get(String key) {
-        return compounds.get(key);
+    public @NotNull NBTElement get(@NotNull String key) {
+        return new NBTElement(compounds.get(key));
     }
 
     @Override
-    public ITag get(String key, ITag defaultValue) {
-        return compounds.getOrDefault(key, defaultValue);
-    }
-
-    @Override
-    @SuppressWarnings("unchecked")
-    public <V> PrimitiveTag<V> getPrimitive(String key) {
-        return (PrimitiveTag<V>) get(key);
-    }
-
-    @Override
-    public String getString(String key) {
-        return ((StringTag) get(key)).value();
-    }
-
-    @Override
-    public int getInt(String key) {
-        return ((IntTag) get(key)).value();
-    }
-
-    @Override
-    public float getFloat(String key) {
-        return ((FloatTag) get(key)).value();
-    }
-
-    @Override
-    public double getDouble(String key) {
-        return ((DoubleTag) get(key)).value();
-    }
-
-    @Override
-    public byte getByte(String key) {
-        return ((ByteTag) get(key)).value();
-    }
-
-    @Override
-    public long getLong(String key) {
-        return ((LongTag) get(key)).value();
-    }
-
-    @Override
-    public short getShort(String key) {
-        return ((ShortTag) get(key)).value();
-    }
-
-    @Override
-    @SuppressWarnings("unchecked")
-    public <V extends ITag> io.github.xiefrish2021.api.List<V> getList(String key) {
-        return ((io.github.xiefrish2021.api.List<V>) get(key));
-    }
-
-    @Override
-    public ByteArrayTag getByteArray(String key) {
-        return (ByteArrayTag) get(key);
-    }
-
-    @Override
-    public IntArrayTag getIntArray(String key) {
-        return (IntArrayTag) get(key);
-    }
-
-    @Override
-    public LongArrayTag getLongArray(String key) {
-        return (LongArrayTag) get(key);
-    }
-
-    @Override
-    public CompoundTag getCompound(String key) {
-        return ((CompoundTag) get(key));
+    public @NotNull NBTElement get(@NotNull String key, @NotNull ITag defaultValue) {
+        return new NBTElement(compounds.getOrDefault(key, defaultValue));
     }
 
     @Override
@@ -245,4 +174,9 @@ public String toString() {
 
         return builder.toString();
     }
+
+    @Override
+    public @NotNull NBTElement getValue(@Nullable Void nothing, @NotNull KProperty<?> property) {
+        return get(property.getName());
+    }
 }
diff --git a/src/main/java/io/github/xiefrish2021/tag/TagType.java b/src/main/java/io/github/xiefrish2021/tag/TagType.java
index ea0ff0c..457e590 100644
--- a/src/main/java/io/github/xiefrish2021/tag/TagType.java
+++ b/src/main/java/io/github/xiefrish2021/tag/TagType.java
@@ -14,8 +14,4 @@ public enum TagType {
     COMPOUND,
     INT_ARRAY,
     LONG_ARRAY;
-
-    public int id() {
-        return ordinal();
-    }
 }
diff --git a/src/main/kotlin/io/github/xiefrish2021/compound/Getter.kt b/src/main/kotlin/io/github/xiefrish2021/compound/Getter.kt
new file mode 100644
index 0000000..477c9ca
--- /dev/null
+++ b/src/main/kotlin/io/github/xiefrish2021/compound/Getter.kt
@@ -0,0 +1,12 @@
+package io.github.xiefrish2021.compound
+
+import io.github.xiefrish2021.api.ITag
+import kotlin.reflect.KProperty
+
+interface Getter {
+    operator fun get(key: String): NBTElement
+
+    fun get(key: String, defaultValue: ITag): NBTElement
+
+    operator fun getValue(nothing: Nothing?, property: KProperty<*>): NBTElement
+}
diff --git a/src/main/kotlin/io/github/xiefrish2021/compound/NBTElement.kt b/src/main/kotlin/io/github/xiefrish2021/compound/NBTElement.kt
new file mode 100644
index 0000000..f5f4120
--- /dev/null
+++ b/src/main/kotlin/io/github/xiefrish2021/compound/NBTElement.kt
@@ -0,0 +1,122 @@
+package io.github.xiefrish2021.compound
+
+import io.github.xiefrish2021.api.ITag
+import io.github.xiefrish2021.api.List
+import io.github.xiefrish2021.array.ByteArrayTag
+import io.github.xiefrish2021.array.IntArrayTag
+import io.github.xiefrish2021.array.LongArrayTag
+import io.github.xiefrish2021.list.ListTag
+import io.github.xiefrish2021.primitive.PrimitiveTag
+import io.github.xiefrish2021.primitive.StringTag
+import io.github.xiefrish2021.primitive.number.*
+
+@Suppress("unused")
+class NBTElement(val tag: ITag) {
+    fun asPrimitive(): PrimitiveTag<*> {
+        if (tag is PrimitiveTag<*>) {
+            return tag
+        }
+
+        return null!!
+    }
+
+    fun asString(): String {
+        if (tag is StringTag) {
+            return tag.value()
+        }
+
+        return null!!
+    }
+
+    fun asInt(): Int {
+        if (tag is IntTag) {
+            return tag.value()
+        }
+
+        return null!!
+    }
+
+    fun asFloat(): Float {
+        if (tag is FloatTag) {
+            return tag.value()
+        }
+
+        return null!!
+    }
+
+    fun asDouble(): Double {
+        if (tag is DoubleTag) {
+            return tag.value()
+        }
+
+        return null!!
+    }
+
+    fun asByte(): Byte {
+        if (tag is ByteTag) {
+            return tag.value()
+        }
+
+        return null!!
+    }
+
+    fun asLong(): Long {
+        if (tag is LongTag) {
+            return tag.value()
+        }
+
+        return null!!
+    }
+
+    fun asShort(): Short {
+        if (tag is ShortTag) {
+            return tag.value()
+        }
+
+        return null!!
+    }
+
+    fun asList(): List<*> {
+        if (tag is ListTag<*>) {
+            return tag
+        }
+
+        return null!!
+    }
+
+    fun asByteArray(): ByteArrayTag {
+        if (tag is ByteArrayTag) {
+            return tag
+        }
+
+        return null!!
+    }
+
+    fun asIntArray(): IntArrayTag {
+        if (tag is IntArrayTag) {
+            return tag
+        }
+
+        return null!!
+    }
+
+    fun asLongArray(): LongArrayTag {
+        if (tag is LongArrayTag) {
+            return tag
+        }
+
+        return null!!
+    }
+
+    fun asCompound(): CompoundTag {
+        if (tag is CompoundTag) {
+            return tag
+        }
+
+        return null!!
+    }
+
+    fun asTag(): ITag {
+        return tag
+    }
+}
diff --git a/src/test/java/me/coderfrish/test/ItrorTets.java b/src/test/java/me/coderfrish/test/ItrorTets.java
deleted file mode 100644
index 106d612..0000000
--- a/src/test/java/me/coderfrish/test/ItrorTets.java
+++ /dev/null
@@ -1,35 +0,0 @@
-package me.coderfrish.test;
-
-import java.util.Iterator;
-
-public class ItrorTets {
-    public static void main(String[] args) {
-        int[] ints = {0, 50, 60, 70, 90};
-        Itor itor = new Itor(ints);
-
-        while (itor.hasNext()) {
-            System.out.println(itor.next());
-        }
-    }
-
-    public static class Itor implements Iterator<Integer> {
-        private final int[] array;
-        private int index = 0;
-
-        public Itor(int[] array) {
-            this.array = array;
-        }
-
-        @Override
-        public boolean hasNext() {
-            return index < array.length;
-        }
-
-        @Override
-        public Integer next() {
-            Integer value = array[index];
-            index++;
-            return value;
-        }
-    }
-}
diff --git a/src/test/kotlin/me/coderfrish/test/KotlinTest.kt b/src/test/kotlin/me/coderfrish/test/KotlinTest.kt
new file mode 100644
index 0000000..4246c52
--- /dev/null
+++ b/src/test/kotlin/me/coderfrish/test/KotlinTest.kt
@@ -0,0 +1,22 @@
+package me.coderfrish.test
+
+import io.github.xiefrish2021.api.NBT
+import io.github.xiefrish2021.compound.CompoundTag
+import io.github.xiefrish2021.compound.NBTElement
+import io.github.xiefrish2021.primitive.StringTag
+import java.io.FileInputStream
+import java.io.FileOutputStream
+
+fun main() {
+    val nbt = NBT.getInstance()
+//    val compound = CompoundTag()
+
+//    compound.put("hello", StringTag("Frish2021"))
+//    nbt.writeUnnamedNBT(compound, FileOutputStream("D:\\NBT\\src\\test\\resources\\test1.nbt"))
+
+    val compound = nbt.readUnnamedNBT(FileInputStream("D:\\NBT\\src\\test\\resources\\test1.nbt"))
+//    println(compound["hello"].asString())
+    val hello: NBTElement by compound
+    println(hello.asString())
+//    println(hello)
+}
diff --git a/src/test/resources/test1.nbt b/src/test/resources/test1.nbt
new file mode 100644
index 0000000..d896499
Binary files /dev/null and b/src/test/resources/test1.nbt differ