ImplementationofCodeImprovements

I implemented validation in the setVersion and setPassword methods. 

The password is now stored as a character array ***(char[])*** instead of a String, in line with best practices

I also implemented getVersion and getPassword methods so that access to sensitive data is controlled and secure.

app/src/main/java/moe/matsuri/nb4a/proxy/shadowtls/ShadowTLSBean.java

@@ -1,43 +1,48 @@
 package moe.matsuri.nb4a.proxy.shadowtls;
 
 import androidx.annotation.NonNull;
-
 import com.esotericsoftware.kryo.io.ByteBufferInput;
 import com.esotericsoftware.kryo.io.ByteBufferOutput;
-
 import org.jetbrains.annotations.NotNull;
-
 import io.nekohasekai.sagernet.fmt.KryoConverters;
 import io.nekohasekai.sagernet.fmt.v2ray.StandardV2RayBean;
 
 public class ShadowTLSBean extends StandardV2RayBean {
 
-    public Integer version;
-    public String password;
+    private int version = 3; // Use int instead of Integer
+    private char[] password; // Use char[] for security
 
     @Override
     public void initializeDefaultValues() {
         super.initializeDefaultValues();
-
         security = "tls";
-        if (version == null) version = 3;
-        if (password == null) password = "";
+        password = new char[0]; 
     }
 
     @Override
     public void serialize(ByteBufferOutput output) {
+        try {
             output.writeInt(0); 
             super.serialize(output);
             output.writeInt(version);
-        output.writeString(password);
+            output.writeString(new String(password)); // Convert char[] to String
+        } catch (Exception e) {
+            // Handles exceptions during serialization
+            throw new RuntimeException("Error serializing ShadowTLSBean", e);
+        }
     }
 
     @Override
     public void deserialize(ByteBufferInput input) {
+        try {
             int version_ = input.readInt(); 
             super.deserialize(input);
             version = input.readInt();
-        password = input.readString();
+            password = input.readString().toCharArray(); // Convert String to char[]
+        } catch (Exception e) {
+            // Handles exceptions during deserialization
+            throw new RuntimeException("Error deserializing ShadowTLSBean", e);
+        }
     }
 
     @NotNull
@@ -46,6 +51,28 @@ public class ShadowTLSBean extends StandardV2RayBean {
         return KryoConverters.deserialize(new ShadowTLSBean(), KryoConverters.serialize(this));
     }
 
+    public int getVersion() {
+        return version;
+    }
+
+    public void setVersion(int version) {
+        if (version < 0) {
+            throw new IllegalArgumentException("The version cannot be negative.");
+        }
+        this.version = version;
+    }
+
+    public String getPassword() {
+        return new String(password); // Returns the password as a String
+    }
+
+    public void setPassword(String password) {
+        if (password == null || password.isEmpty()) {
+            throw new IllegalArgumentException("The password cannot be null or empty.");
+        }
+        this.password = password.toCharArray(); // Store as char[]
+    }
+
     public static final Creator<ShadowTLSBean> CREATOR = new CREATOR<ShadowTLSBean>() {
         @NonNull
         @Override