// Get the current security manager for the application SecurityManager securityManager = System.getSecurityManager(); // Check if a security manager exists for this application if (securityManager != null) { // Ensure the current thread has permission to exit the application securityManager.checkExit(1); }In this example, we first retrieve the current security manager by calling the "getSecurityManager()" method on the System class. We then check if a security manager exists by verifying that the returned object is not null. Finally, we use the "checkExit()" method on the security manager to ensure that the current thread has permission to exit the application with a specific status code (in this case, 1). This method is part of the System class, which is included in the Java Standard Library (JSL) as part of the java.lang package.