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    <p>what i have tried to do is that, you return the status of connection and print it on the mainWindow status_jlable, here you don't need to pass the reference of main window in the database class your just returning the status of connection and thats all you need.</p> <pre><code>public class MainWindows extends JFrame { private JLabel status_label; public MainWindows(){ status_label = new JLabel("Status"); } public void setStatusLabel(String staus){ status_label.setText(staus); } /*. * * your code for visualizing . . . . . .*/ public static void main(String args[]){ MainWindows mw = new MainWindows(); //this will return true if the connection will estblished and will false if not mw.setStatusLabel("Connection established "+ new DatabaseConnection().connect()); } } </code></pre> <p>/////////////database class</p> <pre><code> public class DatabaseConnection{ public boolean connect(){ Connection conn = null; // adding this new variable to get connection status; boolean returnStatus = false; //default return false if connection established it will true . try { String userName = "root"; String password = ""; String url = "jdbc:mysql://localhost:3306"; Class.forName("com.mysql.jdbc.Driver").newInstance(); conn = DriverManager.getConnection(url, userName, password); //This works System.out.println("Connection Established"); //The issue is with this guy returnStatus = true; // making status true if connection is established return returnStatus; } catch(Exception e) { System.err.println("Failed to connect to database"); return returnStatus; } } } </code></pre>
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