[SOLVED] : java.net.SocketException: socket failed EPERM Operation Not Permitted – 2 Simple Reasons

A java.net.SocketException: socket failed: EPERM (Operation not permitted) error can occur in Java" when a program attempts to create a new socket, but the operation is not allowed due to insufficient permissions. This can happen for a number of reasons, including:

• The program does not have the necessary permissions to create a socket.
• The system has reached the maximum number of sockets allowed.
• There is a problem with the network configuration or firewall settings that is preventing the creation of a new socket.

Introduction

Java Socket

In Java", a Socket is a endpoint for sending or receiving data across a computer network. It can be used to establish a connection to a remote host and send or receive data over the network.

A Socket is created using the Java".net.Socket class. It takes two arguments: the IP address of the remote host and the port number on the remote host to which you want to connect. Here is an example of how to create a Socket in Java":

import java.net.Socket;

String host = "www.example.com";
int port = 80;

try {
    Socket socket = new Socket(host, port);
} catch (IOException e) {
    System.err.println("Could not connect to the host: " + host);
}

Once you have a Socket object, you can use it to send and receive data over the network. For example, you can use the getInputStream and getOutputStream methods to get InputStream and OutputStream objects, respectively, which you can use to read from and write to the socket.

I hope this helps! Let me know if you have any other questions about sockets in Java".

Error Troubleshooting

To troubleshoot this error, you can try the following steps:

1. Check that the program has the necessary permissions to create a socket. Depending on the operating system and the security policies in place, you may need to run the program as an administrator or with special privileges to create a socket.
2. Check the system’s maximum number of sockets allowed. This can vary depending on the system configuration, but if the system has reached the maximum number of sockets, you may need to close some existing sockets or increase the maximum number of sockets allowed.
3. Check the network configuration and firewall settings. Make sure that the program is allowed to access the network and create sockets, and that there are no restrictions or rules that are preventing the creation of a new socket.

If these steps do not help, you may need to consult the Java" documentation or seek assistance from a Java" developer or support team to further diagnose and resolve the issue.

Reason 1 -> java.net.socketexception: socket failed: eperm operation not permitted

[ socket failed EPERM Operation not permitted ] The first place to look for the cause may be to check the file AndroidManifest.xml. Make sure you add permission:

java.net.socketexception: socket failed: eperm (operation not permitted)

    <uses-permission android:name="android.permission.INTERNET"/>
    <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />

Reason 2 – java.net.socketexception: socket failed: eperm (operation not permitted)

If you still get this error despite adding the above permissions, then uninstall the application from Emulator and then run again the application from Android" Studio.

What is Android Studio Emulator?

The Android Emulator simulates Android" devices on your PC, allowing you to test your app on a variety of devices and API levels without having to own each one.

The emulator simulates practically every feature of a real Android" device. You may simulate incoming phone calls and SMS messages, set the device’s location, test different network speeds, rotate and test other hardware sensors, and access the Google Play Store, among other things.

Testing your software on the emulator is in some ways faster and easier than doing it on an actual device. For example, you can transfer data to the emulator faster than you can to a USB-connected device.

The emulator has pre-configured settings for a variety of Android" phones, tablets, Wear OS, and Android" TV devices.

The emulator can be used manually via the graphical user interface or programmatically via the command line" and emulator console. See Comparison of Android Emulator" Tools for a comparison of the capabilities offered through each interface.

Summary

I hope that now the following error: java.net.SocketException: socket failed: EPERM (Operation not permitted) is not a trouble for you and you can easily handle it!

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