style: 优化代码

ball-common/src/main/java/cn/hamster3/mc/plugin/ball/common/api/BallAPI.java

@@ -39,6 +39,7 @@ public abstract class BallAPI {
     /**
      * API 实例
      */
+    @Getter
     protected static BallAPI instance;
     @NotNull
     protected final Map<String, BallServerInfo> serverInfo;
@@ -131,15 +132,6 @@ public abstract class BallAPI {
         enabled = false;
     }
 
-    /**
-     * 获取 API 实例
-     *
-     * @return API 实例
-     */
-    public static BallAPI getInstance() {
-        return instance;
-    }
-
     protected void enable() throws SQLException, InterruptedException {
         if (enabled) {
             return;

ball-common/src/main/java/cn/hamster3/mc/plugin/ball/common/config/BallConfig.java

@@ -10,10 +10,8 @@ import org.jetbrains.annotations.NotNull;
 public class BallConfig {
     @NotNull
     private BallServerInfo localInfo;
-
     @NotNull
     private String host;
     private int port;
-
     private int eventLoopThread;
 }

ball-common/src/main/java/cn/hamster3/mc/plugin/ball/common/data/BallBlockPos.java

@@ -12,16 +12,19 @@ import org.jetbrains.annotations.NotNull;
 @AllArgsConstructor
 @SuppressWarnings("unused")
 public class BallBlockPos {
+    @NotNull
     private String serverID;
+    @NotNull
     private String worldName;
     private int x;
     private int y;
     private int z;
 
-    public static BallBlockPos fromJson(String json) {
+    public static BallBlockPos fromJson(@NotNull String json) {
         return CoreAPI.getInstance().getGson().fromJson(json, BallBlockPos.class);
     }
 
+    @NotNull
     public JsonElement toJson() {
         return CoreAPI.getInstance().getGson().toJsonTree(this);
     }

ball-common/src/main/java/cn/hamster3/mc/plugin/ball/common/data/BallLocation.java

@@ -12,7 +12,9 @@ import org.jetbrains.annotations.NotNull;
 @AllArgsConstructor
 @SuppressWarnings("unused")
 public class BallLocation {
+    @NotNull
     private String serverID;
+    @NotNull
     private String worldName;
     private double x;
     private double y;
@@ -21,10 +23,11 @@ public class BallLocation {
     private float yaw;
     private float pitch;
 
-    public static BallLocation fromJson(String json) {
+    public static BallLocation fromJson(@NotNull String json) {
         return CoreAPI.getInstance().getGson().fromJson(json, BallLocation.class);
     }
 
+    @NotNull
     public JsonElement toJson() {
         return CoreAPI.getInstance().getGson().toJsonTree(this);
     }

ball-common/src/main/java/cn/hamster3/mc/plugin/ball/common/data/BallMessageInfo.java

@@ -113,6 +113,7 @@ public class BallMessageInfo {
      * @param <T>   对象类型
      * @return Java 对象
      */
+    @NotNull
     public <T> T getContentAs(@NotNull Class<T> clazz) {
         return CoreAPI.getInstance().getGson().fromJson(content, clazz);
     }

ball-common/src/main/java/cn/hamster3/mc/plugin/ball/common/entity/BallPlayerInfo.java

@@ -2,6 +2,7 @@ package cn.hamster3.mc.plugin.ball.common.entity;
 
 import lombok.AllArgsConstructor;
 import lombok.Data;
+import lombok.NoArgsConstructor;
 import org.jetbrains.annotations.NotNull;
 
 import java.util.UUID;
@@ -10,7 +11,7 @@ import java.util.UUID;
  * 玩家信息
  */
 @Data
-@NotNull
+@NoArgsConstructor
 @AllArgsConstructor
 public class BallPlayerInfo {
     /**