public void actionPerformed(ActionEvent e) {
String user=textField.getText();
String pass=String.valueOf(passwordField.getPassword());

//try{
//if((user!=null)&&(pass!=null)){
//  System.out.println("user is not null");

ui.sendLogin(user,pass);

//}else{}
//}catch(NullPointerException ex){
    //System.out.println("Entered catch block og view"+ex.getMessage());
//}

public void sendLogin(String user, String pass) {
try{
    System.out.println("values from sendLogin"+user+"pass"+pass);
    model.verifyUser(user,pass);
}catch(NullPointerException ex){
    System.out.println("Entered catch block os sendLogin"+ex);
    ex.printStackTrace();
}
}

public void verifyUser(String user,String pass){
        String username="";
        String password="";
        String acc="";
         try{
             String sql="SELECT * FROM users";
             con1.getInstance();
             Statement st = con1.getConn().createStatement();
             ResultSet rs=st.executeQuery(sql);
             rs.next();
             username=rs.getString("username");
             password=rs.getString("password");
             acc=rs.getString("accountType");
             if(username.equals(user)&&password.equals(pass)){
                 System.out.println("Logged into the system");
                 global_username=username;
                 accountType=acc;
             }else{
                 System.out.println("Unsuccessful login"+username+user+password+pass);
             }
            st.execute(sql);
        } catch (SQLException s){
            System.out.println("SQL statement is not executed!"+s);
        }

}

java.lang.NullPointerException
    at org.application.view.LoginController.sendLogin(LoginController.java:64)
    at org.application.view.LoginPage$2.actionPerformed(LoginPage.java:94)
user is not null
values from sendLoginapassabc
Entered catch block os sendLoginjava.lang.NullPointerException
    at javax.swing.AbstractButton.fireActionPerformed(Unknown Source)
    at javax.swing.AbstractButton$Handler.actionPerformed(Unknown Source)
    at javax.swing.DefaultButtonModel.fireActionPerformed(Unknown Source)
    at javax.swing.DefaultButtonModel.setPressed(Unknown Source)
    at javax.swing.plaf.basic.BasicButtonListener.mouseReleased(Unknown Source)
    at java.awt.Component.processMouseEvent(Unknown Source)
    at javax.swing.JComponent.processMouseEvent(Unknown Source)
    at java.awt.Component.processEvent(Unknown Source)
    at java.awt.Container.processEvent(Unknown Source)
    at java.awt.Component.dispatchEventImpl(Unknown Source)
    at java.awt.Container.dispatchEventImpl(Unknown Source)
    at java.awt.Component.dispatchEvent(Unknown Source)
    at java.awt.LightweightDispatcher.retargetMouseEvent(Unknown Source)
    at java.awt.LightweightDispatcher.processMouseEvent(Unknown Source)
    at java.awt.LightweightDispatcher.dispatchEvent(Unknown Source)
    at java.awt.Container.dispatchEventImpl(Unknown Source)
    at java.awt.Window.dispatchEventImpl(Unknown Source)
    at java.awt.Component.dispatchEvent(Unknown Source)
    at java.awt.EventQueue.dispatchEventImpl(Unknown Source)
    at java.awt.EventQueue.access$000(Unknown Source)
    at java.awt.EventQueue$1.run(Unknown Source)
    at java.awt.EventQueue$1.run(Unknown Source)
    at java.security.AccessController.doPrivileged(Native Method)
    at java.security.AccessControlContext$1.doIntersectionPrivilege(Unknown Source)
    at java.security.AccessControlContext$1.doIntersectionPrivilege(Unknown Source)
    at java.awt.EventQueue$2.run(Unknown Source)
    at java.awt.EventQueue$2.run(Unknown Source)
    at java.security.AccessController.doPrivileged(Native Method)
    at java.security.AccessControlContext$1.doIntersectionPrivilege(Unknown Source)
    at java.awt.EventQueue.dispatchEvent(Unknown Source)
    at java.awt.EventDispatchThread.pumpOneEventForFilters(Unknown Source)
    at java.awt.EventDispatchThread.pumpEventsForFilter(Unknown Source)
    at java.awt.EventDispatchThread.pumpEventsForHierarchy(Unknown Source)
    at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
    at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
    at java.awt.EventDispatchThread.run(Unknown Source)