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java - a program to print open ports
“java - a program to print open ports” Code Answer
java - a program to print open ports
java by
Syrian Lucianos
on Jun 26 2020
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import java.io.IOException; import java.net.Socket; public class App { public static void main(String[] args) { Socket tempSocket = new Socket(); // Initialize boolean isOpened; // Loop through all the 65536 ports for (int port = 0; port < 65536; port++) { // We will assume the current port is opened unless // An exception occurs isOpened = true; try { // Let's try connecting tempSocket = new Socket("127.0.0.1", port); } catch (IOException e) { // If an IOException occurs, then port is closed isOpened = false; } finally { // Close the socket to save resources tempSocket.close(); } // If port is opened print a message to the console if (isOpened) { String message = String.format("port %d is open", port); System.out.println(message); } } } }
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