diff --git a/mirai-core/src/main/java/net/mamoe/mirai/Robot.java b/mirai-core/src/main/java/net/mamoe/mirai/Robot.java
index 9ee465ae8..890daf7db 100644
--- a/mirai-core/src/main/java/net/mamoe/mirai/Robot.java
+++ b/mirai-core/src/main/java/net/mamoe/mirai/Robot.java
@@ -12,7 +12,7 @@ public class Robot {
 
     private final int qq;
     private final String password;
-    private final RobotNetworkHandler handler ;
+    private final RobotNetworkHandler handler;
 
     /**
      * Ref list
@@ -20,7 +20,7 @@ public class Robot {
     @Getter
     private final List<String> owners;
 
-    public boolean isOwnBy(String ownerName){
+    public boolean isOwnBy(String ownerName) {
         return owners.contains(ownerName);
     }
 
@@ -29,28 +29,28 @@ public class Robot {
         this(
                 data.getIntOrThrow("account", () -> new Exception("can not parse QQ account")),
                 data.getStringOrThrow("password", () -> new Exception("can not parse QQ password")),
-                data.getAsOrDefault("owners",new ArrayList<>())
+                data.getAsOrDefault("owners", ArrayList::new)
         );
 
     }
 
 
-    public Robot(int qq, String password, List<String> owners){
+    public Robot(int qq, String password, List<String> owners) {
         this.qq = qq;
         this.password = password;
         this.owners = Collections.unmodifiableList(owners);
-        this.handler = new RobotNetworkHandler(this.qq,this.password);
+        this.handler = new RobotNetworkHandler(this.qq, this.password);
 
 
     }
 
 
-    public void connect(){
+    public void connect() {
 
     }
 
 
-    public void onPacketReceive(){
+    public void onPacketReceive() {
 
     }
 
diff --git a/mirai-core/src/main/java/net/mamoe/mirai/network/RobotNetworkHandler.kt b/mirai-core/src/main/java/net/mamoe/mirai/network/RobotNetworkHandler.kt
index 594fad924..88796bd9d 100644
--- a/mirai-core/src/main/java/net/mamoe/mirai/network/RobotNetworkHandler.kt
+++ b/mirai-core/src/main/java/net/mamoe/mirai/network/RobotNetworkHandler.kt
@@ -18,7 +18,7 @@ import java.net.InetSocketAddress
 import java.util.*
 
 /**
- * A robotNetworkHandler account.
+ * A RobotNetworkHandler is used to connect with Tencent servers.
  *
  * @author Him188moe
  */
diff --git a/mirai-core/src/main/java/net/mamoe/mirai/utils/config/MiraiConfigSection.java b/mirai-core/src/main/java/net/mamoe/mirai/utils/config/MiraiConfigSection.java
index a7c150919..196ddd59a 100644
--- a/mirai-core/src/main/java/net/mamoe/mirai/utils/config/MiraiConfigSection.java
+++ b/mirai-core/src/main/java/net/mamoe/mirai/utils/config/MiraiConfigSection.java
@@ -1,10 +1,11 @@
 package net.mamoe.mirai.utils.config;
+
 import org.jetbrains.annotations.Nullable;
 
-import java.util.IllegalFormatException;
 import java.util.LinkedHashMap;
 import java.util.Map;
 import java.util.concurrent.Callable;
+import java.util.function.Supplier;
 
 public class MiraiConfigSection<T> extends MiraiSynchronizedLinkedListMap<String, T> {
 
@@ -12,18 +13,18 @@ public class MiraiConfigSection<T> extends MiraiSynchronizedLinkedListMap<String
         super();
     }
 
-    public MiraiConfigSection(LinkedHashMap<String, T> map){
-        super(map);
+    public MiraiConfigSection(Map<String, T> copyOfMap) {
+        super(new LinkedHashMap<>(copyOfMap));
     }
 
     public int getInt(String key){
-        return Integer.valueOf(this.get(key).toString());
+        return Integer.parseInt(this.get(key).toString());
     }
 
     public int getIntOrDefault(String key, int defaultV){
         Object result = this.getOrDefault(key, null);
         try {
-            return result == null ? defaultV : Integer.valueOf(result.toString());
+            return result == null ? defaultV : Integer.parseInt(result.toString());
         }catch (NumberFormatException ignored){
             return defaultV;
         }
@@ -35,20 +36,20 @@ public class MiraiConfigSection<T> extends MiraiSynchronizedLinkedListMap<String
             throw throwableCallable.call();
         }
         try {
-            return Integer.valueOf(result.toString());
+            return Integer.parseInt(result.toString());
         }catch (NumberFormatException ignored){
             throw throwableCallable.call();
         }
     }
 
     public double getDouble(String key){
-        return Double.valueOf(this.get(key).toString());
+        return Double.parseDouble(this.get(key).toString());
     }
 
     public double getDoubleOrDefault(String key, double defaultV){
         Object result = this.getOrDefault(key, null);
         try {
-            return result==null?defaultV:Double.valueOf(result.toString());
+            return result == null ? defaultV : Double.parseDouble(result.toString());
         }catch (NumberFormatException ignored){
             return defaultV;
         }
@@ -60,20 +61,20 @@ public class MiraiConfigSection<T> extends MiraiSynchronizedLinkedListMap<String
             throw throwableCallable.call();
         }
         try {
-            return Double.valueOf(result.toString());
+            return Double.parseDouble(result.toString());
         }catch (NumberFormatException ignored){
             throw throwableCallable.call();
         }
     }
 
     public float getFloat(String key){
-        return Float.valueOf(this.get(key).toString());
+        return Float.parseFloat(this.get(key).toString());
     }
 
     public float getFloatOrDefault(String key, float defaultV){
         Object result = this.getOrDefault(key, null);
         try {
-            return result == null ? defaultV : Float.valueOf(result.toString());
+            return result == null ? defaultV : Float.parseFloat(result.toString());
         }catch (NumberFormatException ignored){
             return defaultV;
         }
@@ -85,20 +86,20 @@ public class MiraiConfigSection<T> extends MiraiSynchronizedLinkedListMap<String
             throw throwableCallable.call();
         }
         try {
-            return Float.valueOf(result.toString());
+            return Float.parseFloat(result.toString());
         }catch (NumberFormatException ignored){
             throw throwableCallable.call();
         }
     }
 
     public long getLong(String key){
-        return Long.valueOf(this.get(key).toString());
+        return Long.parseLong(this.get(key).toString());
     }
 
     public long getLongOrDefault(String key, long defaultV){
         Object result = this.getOrDefault(key, null);
         try {
-            return result == null ? defaultV : Long.valueOf(result.toString());
+            return result == null ? defaultV : Long.parseLong(result.toString());
         }catch (NumberFormatException ignored){
             return defaultV;
         }
@@ -110,7 +111,7 @@ public class MiraiConfigSection<T> extends MiraiSynchronizedLinkedListMap<String
             throw throwableCallable.call();
         }
         try {
-            return Long.valueOf(result.toString());
+            return Long.parseLong(result.toString());
         }catch (NumberFormatException ignored){
             throw throwableCallable.call();
         }
@@ -161,4 +162,18 @@ public class MiraiConfigSection<T> extends MiraiSynchronizedLinkedListMap<String
     public <D extends T> D getAsOrDefault(String key, D defaultV){
         return (D)this.getOrDefault(key,defaultV);
     }
+
+    @SuppressWarnings("unchecked")
+    public <D extends T> D getAsOrDefault(String key, Supplier<D> supplier) {
+        D d = (D) this.get(key);
+        if (d != null) {
+            return d;
+        }
+        return supplier.get();
+    }
+
+    @SuppressWarnings("unchecked")
+    public <D extends T> D getAs(String key) {
+        return (D) this.get(key);
+    }
 }