Can Any One say how to fix this

Extensions Extension Development
#1

Hi Guys I Am Getting This Error When I Compile My Extension

Started Compiling Project Mysql
Buildfile: /compiler/androidX/build.xml

javac:
[mkdir] Created dir: /compiler/androidX/build/Wkcmu/classes
[javac] Compiling 1 source file to /compiler/androidX/build/Wkcmu/classes
[javac] warning: [options] bootstrap class path not set in conjunction with -source 1.7
[javac] Note: Wrote file file:/compiler/androidX/build/Wkcmu/classes/simple_components.json
[javac] Note: Wrote file file:/compiler/androidX/build/Wkcmu/classes/simple_components.txt
[javac] Note: Wrote file file:/compiler/androidX/build/Wkcmu/classes/simple_components_build_info.json
[javac] Note: Wrote file file:/compiler/androidX/build/Wkcmu/classes/AutogeneratedOdeMessages.java
[javac] Note: Wrote file file:/compiler/androidX/build/Wkcmu/classes/ComponentsTranslation.java
[javac] /compiler/androidX/src/Wkcmu/com/mysql/creative/Mysql.java:40: error: bad operand type String for unary operator '+++'
[javac] URLGenerated(+ "INSERT INTO `" +Tablename + "`(`Dealer_Name`, `PDF`, `OrderId`, `Location`, `Month`) VALUES (' " + Dealername +"','"+ PDF +"','"+ OrderID +"','"+ Location +"','"+ Date + "')");
[javac] ^
[javac] 1 error

Can You How To Fix This

#2

Guys This Is My Code

Code

package com.mysql.creative;

import android.app.Activity;

import android.content.Context;

import com.google.appinventor.components.annotations.*;

import com.google.appinventor.components.common.ComponentCategory;

import com.google.appinventor.components.runtime.AndroidNonvisibleComponent;

import com.google.appinventor.components.runtime.ComponentContainer;

import com.google.appinventor.components.runtime.EventDispatcher;

@DesignerComponent(

    version = 1,

    description = "",

    category = ComponentCategory.EXTENSION,

    nonVisible = true,

    iconName = "")

@SimpleObject(external = true)

//Libraries

@UsesLibraries(libraries = “”)

//Permissions

@UsesPermissions(permissionNames = “”)

public class Mysql extends AndroidNonvisibleComponent {

//Activity and Context

private Context context;

private Activity activity;

public Mysql(ComponentContainer container){

    super(container.$form());

    this.activity = container.$context();

    this.context = container.$context();

}

@SimpleFunction(description = "Creates Payment")

public void IntiatePayment(String Tablename, String Dealername , String PDF ,String OrderID,String Location,String Date) {

   URLGenerated(+ "INSERT INTO `" +Tablename + "`(`Dealer_Name`, `PDF`, `OrderId`, `Location`, `Month`) VALUES (' " + Dealername +"','"+ PDF +"','"+ OrderID +"','"+ Location +"','"+ Date + "')");

}



@SimpleEvent(description = "Generated URL")

public void URLGenerated(String URL) {

  EventDispatcher.dispatchEvent(this, "URLGenerated", URL);

}

}

#3

guys i just fixed it i found the mistake

#4