Revert "Revert "UOCL-285: payment screen hanging (#42)""

This reverts commit acc38ba567.

src/main/java/com/unicenta/pos/transfer/Transfer.java

@@ -43,6 +43,8 @@ import java.sql.*;
 import java.util.ArrayList;
 import java.util.List;
 import java.util.Properties;
+import java.util.concurrent.ExecutorService;
+import java.util.concurrent.Executors;
 import java.util.regex.Matcher;
 
 /**
@@ -2721,6 +2723,7 @@ public final class Transfer extends JPanel implements JPanelView {
             JOptionPane.YES_NO_OPTION,
             JOptionPane.QUESTION_MESSAGE) == JOptionPane.YES_OPTION) {
 
+      ExecutorService customExecutor = Executors.newCachedThreadPool();
       SwingWorker<Void, Void> worker = new SwingWorker<Void, Void>() {
 
         @Override
@@ -2731,7 +2734,8 @@ public final class Transfer extends JPanel implements JPanelView {
         }
       };
 
-      worker.execute();
+      //worker.execute();
+      customExecutor.submit(worker);
 
     }
     System.gc();