Send Images to Telegram Groups in Java - Complete Guide

Automate Telegram Group Image Sharing with Java

Need to integrate Telegram group image sharing into your Java applications for team collaboration, automated reporting, or system notifications? This guide shows you how to deliver images to Telegram groups using Java and the WhatsMate Telegram Gateway REST API. Perfect for Java developers building enterprise applications, backend services, or automation tools that need visual content delivery to group chats.

📋 Prerequisites

Before you begin, ensure you have:

1. A WhatsMate Telegram Gateway account - Required for API access
2. Group membership - The gateway must be a member of the target Telegram group
3. Java Development Kit (JDK) 8 or later - Installed and configured on your system
4. Image file ready - Have the image you want to send available locally
5. Required dependencies - Gson and Commons Codec libraries (instructions included)

⚠️ Important: The gateway must be a member of the Telegram group you want to send messages to. The group admin phone number is used to uniquely identify the group.

🎥 Video Walkthrough

📝 Step-by-Step Implementation

Follow these steps to send your first image to a Telegram group from a Java application:

1. Copy the Java Source Code

Start by copying the following source code into your Java file:

2. Configure a few Parameters

Customize these key parameters in the Java code:

• Line 50: Replace "YOUR_INSTANCE_ID_HERE" with your Telegram gateway instance ID
• Line 51: Replace "YOUR_CLIENT_ID_HERE" with your Client ID
• Line 52: Replace "YOUR_CLIENT_SECRET_HERE" with your Client Secret
• Line 60: Replace "Muscle Men Club" with the name of your target Telegram group
• Line 61: Replace "19159876123" with the phone number of the group admin (including country code)
• Line 64: Replace "../assets/cute-girl.jpg" with the path to your image file
• Line 66: Replace "Lovely Girl" with an optional caption for your image

3. Set Up Dependencies

Add the required libraries to your project:

For Maven projects, add to your pom.xml:

<dependency>
    <groupId>com.google.code.gson</groupId>
    <artifactId>gson</artifactId>
    <version>2.8.0</version>
</dependency>
<dependency>
    <groupId>commons-codec</groupId>
    <artifactId>commons-codec</artifactId>
    <version>1.10</version>
</dependency>

4. Compile and Run

Compile and execute your Java program:

If using Maven (after adding dependencies to pom.xml):

mvn compile
mvn exec:java -Dexec.mainClass="TelegramGroupPhotoSender"

If not using Maven:

# Compile with required JAR files
javac -cp "jars/gson-2.8.0.jar:jars/commons-codec-1.10.jar" TelegramGroupPhotoSender.java

# Run the compiled program
java -cp ".:jars/gson-2.8.0.jar:jars/commons-codec-1.10.jar" TelegramGroupPhotoSender

🔧 Common Use Cases

This Java integration is ideal for:

• Enterprise application integration - Add Telegram group image sharing to Java-based business systems
• Backend service notifications - Send visual alerts or reports from Java microservices to team groups
• Automated reporting systems - Generate and deliver charts, graphs, or screenshots to Telegram groups
• Java-based monitoring tools - Integrate with system monitoring applications for visual status updates
• Batch processing workflows - Automate image delivery as part of larger Java data processing pipelines

🚀 Get Started Today

Ready to integrate Telegram group image sharing into your Java applications? You’ll need a trial account to access the API. Sign up for a 2-week trial and start sending images to groups from your Java code within minutes!

Next Steps: Once you’ve mastered group image sending, explore advanced features like sending documents to groups, audio files to groups, or individual messages through the WhatsMate Telegram Gateway API documentation.