Generics to center all types of JFrame children

Lab2/src/main/java/org/lumijiez/gui/forms/faculty/AddFacultyForm.java

@@ -5,6 +5,7 @@ import org.lumijiez.enums.StudyField;
 import org.lumijiez.gui.util.ComboRenderer;
 import org.lumijiez.gui.util.ComponentDecorator;
 import org.lumijiez.gui.util.DisplayHandler;
+import org.lumijiez.gui.util.WindowConfig;
 import org.lumijiez.managers.Supervisor;
 
 import javax.swing.*;
@@ -82,7 +83,6 @@ public class AddFacultyForm extends JFrame {
                         .addGap(0, 0, Short.MAX_VALUE)
                         .addComponent(titleLabel)
                         .addGap(149, 149, 149)));
-
         layout.setVerticalGroup(layout.createParallelGroup(GroupLayout.Alignment.LEADING)
                 .addGroup(layout.createSequentialGroup()
                         .addGap(7, 7, 7)
@@ -103,10 +103,7 @@ public class AddFacultyForm extends JFrame {
                                 .addComponent(submitButton))
                         .addContainerGap(24, Short.MAX_VALUE)));
         pack();
-        Dimension screenSize = Toolkit.getDefaultToolkit().getScreenSize();
+        WindowConfig.center(this);
-        int x = (screenSize.width - this.getWidth()) / 2;
-        int y = (screenSize.height - this.getHeight()) / 2;
-        this.setLocation(x, y);
     }
 
     private void submitEvent(ActionEvent evt) {

Lab2/src/main/java/org/lumijiez/gui/forms/faculty/EditFacultyForm.java

@@ -5,6 +5,7 @@ import org.lumijiez.enums.StudyField;
 import org.lumijiez.gui.util.ComboRenderer;
 import org.lumijiez.gui.util.ComponentDecorator;
 import org.lumijiez.gui.util.DisplayHandler;
+import org.lumijiez.gui.util.WindowConfig;
 import org.lumijiez.managers.Supervisor;
 
 import javax.swing.*;
@@ -114,14 +115,13 @@ public class EditFacultyForm extends JFrame {
                                         .addComponent(submitButton))
                                 .addGap(14, 14, 14)));
         pack();
-        Dimension screenSize = Toolkit.getDefaultToolkit().getScreenSize();
+        WindowConfig.center(this);
-        int x = (screenSize.width - this.getWidth()) / 2;
-        int y = (screenSize.height - this.getHeight()) / 2;
-        this.setLocation(x, y);
     }
 
     private void facultyComboEvent(ActionEvent actionEvent) {
-        specialtyCombo.setSelectedItem(((Faculty) Objects.requireNonNull(facultyCombo.getSelectedItem())).getField());
+        Faculty fac = ((Faculty) Objects.requireNonNull(facultyCombo.getSelectedItem()));
+        specialtyCombo.setSelectedItem(fac.getField());
+        nameField.setText(fac.getName());
     }
 
     private void specialtyComboEvent(ActionEvent actionEvent) {

Lab2/src/main/java/org/lumijiez/gui/forms/faculty/RemoveFacultyForm.java

@@ -4,6 +4,7 @@ import org.lumijiez.base.Faculty;
 import org.lumijiez.gui.util.ComboRenderer;
 import org.lumijiez.gui.util.ComponentDecorator;
 import org.lumijiez.gui.util.DisplayHandler;
+import org.lumijiez.gui.util.WindowConfig;
 import org.lumijiez.managers.Supervisor;
 
 import javax.swing.*;
@@ -76,10 +77,7 @@ public class RemoveFacultyForm extends JFrame {
                                         .addComponent(submitButton))
                                 .addContainerGap(21, Short.MAX_VALUE)));
         pack();
-        Dimension screenSize = Toolkit.getDefaultToolkit().getScreenSize();
+        WindowConfig.center(this);
-        int x = (screenSize.width - this.getWidth()) / 2;
-        int y = (screenSize.height - this.getHeight()) / 2;
-        this.setLocation(x, y);
     }
 
     private void submitEvent(ActionEvent evt) {

Lab2/src/main/java/org/lumijiez/gui/forms/faculty/ShowFacultyForm.java

@@ -4,6 +4,7 @@ import org.lumijiez.base.Faculty;
 import org.lumijiez.base.Group;
 import org.lumijiez.gui.util.ComboRenderer;
 import org.lumijiez.gui.util.ComponentDecorator;
+import org.lumijiez.gui.util.WindowConfig;
 import org.lumijiez.managers.Supervisor;
 
 import javax.swing.*;
@@ -79,10 +80,7 @@ public class ShowFacultyForm extends JFrame {
                                         .addComponent(submitButton))
                                 .addContainerGap(24, Short.MAX_VALUE)));
         pack();
-        Dimension screenSize = Toolkit.getDefaultToolkit().getScreenSize();
+        WindowConfig.center(this);
-        int x = (screenSize.width - this.getWidth()) / 2;
-        int y = (screenSize.height - this.getHeight()) / 2;
-        this.setLocation(x, y);
     }
 
     private void submitEvent(ActionEvent evt) {

Lab2/src/main/java/org/lumijiez/gui/forms/faculty/ShowSpecialtyFacultyForm.java

@@ -4,6 +4,7 @@ import org.lumijiez.base.Faculty;
 import org.lumijiez.enums.StudyField;
 import org.lumijiez.gui.util.ComboRenderer;
 import org.lumijiez.gui.util.ComponentDecorator;
+import org.lumijiez.gui.util.WindowConfig;
 import org.lumijiez.managers.Supervisor;
 
 import javax.swing.*;
@@ -79,10 +80,7 @@ public class ShowSpecialtyFacultyForm extends JFrame {
                                         .addComponent(submitButton))
                                 .addContainerGap(24, Short.MAX_VALUE)));
         pack();
-        Dimension screenSize = Toolkit.getDefaultToolkit().getScreenSize();
+        WindowConfig.center(this);
-        int x = (screenSize.width - this.getWidth()) / 2;
-        int y = (screenSize.height - this.getHeight()) / 2;
-        this.setLocation(x, y);
     }
 
     private void submitEvent(ActionEvent evt) {

Lab2/src/main/java/org/lumijiez/gui/forms/group/AddGroupForm.java

@@ -5,6 +5,7 @@ import org.lumijiez.base.Group;
 import org.lumijiez.gui.util.ComboRenderer;
 import org.lumijiez.gui.util.ComponentDecorator;
 import org.lumijiez.gui.util.DisplayHandler;
+import org.lumijiez.gui.util.WindowConfig;
 import org.lumijiez.managers.Supervisor;
 
 import javax.swing.*;
@@ -89,10 +90,7 @@ public class AddGroupForm extends JFrame {
                                         .addComponent(submitButton))
                                 .addGap(15, 15, 15)));
         pack();
-        Dimension screenSize = Toolkit.getDefaultToolkit().getScreenSize();
+        WindowConfig.center(this);
-        int x = (screenSize.width - this.getWidth()) / 2;
-        int y = (screenSize.height - this.getHeight()) / 2;
-        this.setLocation(x, y);
     }
 
     private void submitEvent(ActionEvent evt) {

Lab2/src/main/java/org/lumijiez/gui/forms/group/DeleteGroupForm.java

@@ -4,6 +4,7 @@ import org.lumijiez.base.Group;
 import org.lumijiez.gui.util.ComboRenderer;
 import org.lumijiez.gui.util.ComponentDecorator;
 import org.lumijiez.gui.util.DisplayHandler;
+import org.lumijiez.gui.util.WindowConfig;
 import org.lumijiez.managers.Supervisor;
 
 import javax.swing.*;
@@ -77,10 +78,7 @@ public class DeleteGroupForm extends JFrame {
                                         .addComponent(submitButton))
                                 .addContainerGap(18, Short.MAX_VALUE)));
         pack();
-        Dimension screenSize = Toolkit.getDefaultToolkit().getScreenSize();
+        WindowConfig.center(this);
-        int x = (screenSize.width - this.getWidth()) / 2;
-        int y = (screenSize.height - this.getHeight()) / 2;
-        this.setLocation(x, y);
     }
 
     private void submitEvent(ActionEvent evt) {

Lab2/src/main/java/org/lumijiez/gui/forms/group/EditGroupForm.java

@@ -5,6 +5,7 @@ import org.lumijiez.base.Group;
 import org.lumijiez.gui.util.ComboRenderer;
 import org.lumijiez.gui.util.ComponentDecorator;
 import org.lumijiez.gui.util.DisplayHandler;
+import org.lumijiez.gui.util.WindowConfig;
 import org.lumijiez.managers.Supervisor;
 
 import javax.swing.*;
@@ -103,18 +104,17 @@ public class EditGroupForm extends JFrame {
                                         .addComponent(submitButton))
                                 .addContainerGap(36, Short.MAX_VALUE)));
         pack();
-        Dimension screenSize = Toolkit.getDefaultToolkit().getScreenSize();
+        WindowConfig.center(this);
-        int x = (screenSize.width - this.getWidth()) / 2;
-        int y = (screenSize.height - this.getHeight()) / 2;
-        this.setLocation(x, y);
     }
 
     private void submitEvent(ActionEvent evt) {
         Faculty fac = ((Faculty) Objects.requireNonNull(facultyCombo.getSelectedItem()));
         Group gr = (Group) Objects.requireNonNull(groupCombo.getSelectedItem());
-        sv.editGroup(gr, nameField.getText(), fac);
+        if (!nameField.getText().isEmpty()) {
-        DisplayHandler.displayGroups();
+            sv.editGroup(gr, nameField.getText(), fac);
-        this.dispose();
+            DisplayHandler.displayGroups();
+            this.dispose();
+        } else JOptionPane.showMessageDialog(null, "Fill in all the fields!", "Warning!", JOptionPane.INFORMATION_MESSAGE, null);
     }
 
     private void cancelEvent(ActionEvent evt) {

Lab2/src/main/java/org/lumijiez/gui/forms/group/ShowGroupForm.java

@@ -4,6 +4,7 @@ import org.lumijiez.base.Group;
 import org.lumijiez.base.Student;
 import org.lumijiez.gui.util.ComboRenderer;
 import org.lumijiez.gui.util.ComponentDecorator;
+import org.lumijiez.gui.util.WindowConfig;
 import org.lumijiez.managers.Supervisor;
 
 import javax.swing.*;
@@ -81,10 +82,7 @@ public class ShowGroupForm extends JFrame {
                                         .addComponent(submitButton))
                                 .addContainerGap(25, Short.MAX_VALUE)));
         pack();
-        Dimension screenSize = Toolkit.getDefaultToolkit().getScreenSize();
+        WindowConfig.center(this);
-        int x = (screenSize.width - this.getWidth()) / 2;
-        int y = (screenSize.height - this.getHeight()) / 2;
-        this.setLocation(x, y);
     }
 
     private void submitEvent(ActionEvent evt) {

Lab2/src/main/java/org/lumijiez/gui/forms/student/AddStudentForm.java

@@ -5,6 +5,7 @@ import org.lumijiez.base.Group;
 import org.lumijiez.gui.util.ComboRenderer;
 import org.lumijiez.gui.util.ComponentDecorator;
 import org.lumijiez.gui.util.DisplayHandler;
+import org.lumijiez.gui.util.WindowConfig;
 import org.lumijiez.managers.Supervisor;
 
 import javax.swing.*;
@@ -234,10 +235,7 @@ public class AddStudentForm extends JFrame {
                                         .addComponent(submitButton))
                                 .addGap(21, 21, 21)));
         pack();
-        Dimension screenSize = Toolkit.getDefaultToolkit().getScreenSize();
+        WindowConfig.center(this);
-        int x = (screenSize.width - this.getWidth()) / 2;
-        int y = (screenSize.height - this.getHeight()) / 2;
-        this.setLocation(x, y);
     }
 
     private void cancelEvent(ActionEvent actionEvent) {

Lab2/src/main/java/org/lumijiez/gui/forms/student/DeleteStudentForm.java

@@ -4,6 +4,7 @@ import org.lumijiez.base.Student;
 import org.lumijiez.gui.util.ComboRenderer;
 import org.lumijiez.gui.util.ComponentDecorator;
 import org.lumijiez.gui.util.DisplayHandler;
+import org.lumijiez.gui.util.WindowConfig;
 import org.lumijiez.managers.Supervisor;
 
 import javax.swing.*;
@@ -78,10 +79,7 @@ public class DeleteStudentForm extends JFrame {
                                         .addComponent(cancelButton))
                                 .addContainerGap(26, Short.MAX_VALUE)));
         pack();
-        Dimension screenSize = Toolkit.getDefaultToolkit().getScreenSize();
+        WindowConfig.center(this);
-        int x = (screenSize.width - this.getWidth()) / 2;
-        int y = (screenSize.height - this.getHeight()) / 2;
-        this.setLocation(x, y);
     }
 
     private void submitEvent(ActionEvent evt) {

Lab2/src/main/java/org/lumijiez/gui/forms/student/EditStudentForm.java

@@ -6,6 +6,7 @@ import org.lumijiez.base.Student;
 import org.lumijiez.gui.util.ComboRenderer;
 import org.lumijiez.gui.util.ComponentDecorator;
 import org.lumijiez.gui.util.DisplayHandler;
+import org.lumijiez.gui.util.WindowConfig;
 import org.lumijiez.managers.Supervisor;
 
 import javax.swing.*;
@@ -243,10 +244,7 @@ public class EditStudentForm extends JFrame {
                                         .addComponent(cancelButton))
                                 .addContainerGap(25, Short.MAX_VALUE)));
         pack();
-        Dimension screenSize = Toolkit.getDefaultToolkit().getScreenSize();
+        WindowConfig.center(this);
-        int x = (screenSize.width - this.getWidth()) / 2;
-        int y = (screenSize.height - this.getHeight()) / 2;
-        this.setLocation(x, y);
     }
 
     private void cancelEvent(ActionEvent actionEvent) {

Lab2/src/main/java/org/lumijiez/gui/forms/student/GradeStudentForm.java

@@ -5,6 +5,7 @@ import org.lumijiez.base.Student;
 import org.lumijiez.enums.Subjects;
 import org.lumijiez.gui.util.ComboRenderer;
 import org.lumijiez.gui.util.ComponentDecorator;
+import org.lumijiez.gui.util.WindowConfig;
 import org.lumijiez.managers.Supervisor;
 
 import javax.swing.*;
@@ -109,10 +110,7 @@ public class GradeStudentForm extends JFrame {
                                         .addComponent(submitButton))
                                 .addContainerGap(30, Short.MAX_VALUE)));
         pack();
-        Dimension screenSize = Toolkit.getDefaultToolkit().getScreenSize();
+        WindowConfig.center(this);
-        int x = (screenSize.width - this.getWidth()) / 2;
-        int y = (screenSize.height - this.getHeight()) / 2;
-        this.setLocation(x, y);
     }
 
     private void submitEvent(ActionEvent evt) {

Lab2/src/main/java/org/lumijiez/gui/forms/student/GraduateStudentForm.java

@@ -4,6 +4,7 @@ import org.lumijiez.base.Student;
 import org.lumijiez.gui.util.ComboRenderer;
 import org.lumijiez.gui.util.ComponentDecorator;
 import org.lumijiez.gui.util.DisplayHandler;
+import org.lumijiez.gui.util.WindowConfig;
 import org.lumijiez.managers.Supervisor;
 
 import javax.swing.*;
@@ -78,10 +79,7 @@ public class GraduateStudentForm extends JFrame {
                                         .addComponent(cancelButton))
                                 .addContainerGap(26, Short.MAX_VALUE)));
         pack();
-        Dimension screenSize = Toolkit.getDefaultToolkit().getScreenSize();
+        WindowConfig.center(this);
-        int x = (screenSize.width - this.getWidth()) / 2;
-        int y = (screenSize.height - this.getHeight()) / 2;
-        this.setLocation(x, y);
     }
 
     private void cancelEvent(ActionEvent evt) {

Lab2/src/main/java/org/lumijiez/gui/forms/student/ShowStudentForm.java

@@ -3,6 +3,7 @@ package org.lumijiez.gui.forms.student;
 import org.lumijiez.base.Student;
 import org.lumijiez.gui.util.ComboRenderer;
 import org.lumijiez.gui.util.ComponentDecorator;
+import org.lumijiez.gui.util.WindowConfig;
 import org.lumijiez.managers.Supervisor;
 
 import javax.swing.*;
@@ -81,10 +82,7 @@ public class ShowStudentForm extends JFrame {
                                         .addComponent(submitButton))
                                 .addContainerGap(22, Short.MAX_VALUE)));
         pack();
-        Dimension screenSize = Toolkit.getDefaultToolkit().getScreenSize();
+        WindowConfig.center(this);
-        int x = (screenSize.width - this.getWidth()) / 2;
-        int y = (screenSize.height - this.getHeight()) / 2;
-        this.setLocation(x, y);
     }
 
     private void submitEvent(ActionEvent evt) {

Lab2/src/main/java/org/lumijiez/gui/forms/student/ShowStudentGradesForm.java

@@ -4,6 +4,7 @@ import org.lumijiez.base.Grade;
 import org.lumijiez.base.Student;
 import org.lumijiez.gui.util.ComboRenderer;
 import org.lumijiez.gui.util.ComponentDecorator;
+import org.lumijiez.gui.util.WindowConfig;
 import org.lumijiez.managers.Supervisor;
 
 import javax.swing.*;
@@ -82,10 +83,7 @@ public class ShowStudentGradesForm extends JFrame {
                                         .addComponent(submitButton))
                                 .addContainerGap(22, Short.MAX_VALUE)));
         pack();
-        Dimension screenSize = Toolkit.getDefaultToolkit().getScreenSize();
+        WindowConfig.center(this);
-        int x = (screenSize.width - this.getWidth()) / 2;
-        int y = (screenSize.height - this.getHeight()) / 2;
-        this.setLocation(x, y);
     }
 
     private void submitEvent(ActionEvent evt) {

Lab2/src/main/java/org/lumijiez/gui/loader/BatchGraduater.java

@@ -6,6 +6,7 @@ import org.lumijiez.base.Student;
 import org.lumijiez.enums.StudyField;
 import org.lumijiez.gui.util.ComponentDecorator;
 import org.lumijiez.gui.util.DisplayHandler;
+import org.lumijiez.gui.util.WindowConfig;
 import org.lumijiez.managers.Supervisor;
 
 import javax.swing.*;
@@ -50,7 +51,6 @@ public class BatchGraduater extends JFrame {
         formatLabel.setText("File format example:");
         cancelButton.setText("Cancel");
 
-
         exampleText.setColumns(15);
         exampleText.setRows(5);
         exampleText.setEditable(false);
@@ -99,10 +99,7 @@ public class BatchGraduater extends JFrame {
                                         .addComponent(submitButton))
                                 .addGap(23, 23, 23)));
         pack();
-        Dimension screenSize = Toolkit.getDefaultToolkit().getScreenSize();
+        WindowConfig.center(this);
-        int x = (screenSize.width - this.getWidth()) / 2;
-        int y = (screenSize.height - this.getHeight()) / 2;
-        this.setLocation(x, y);
     }
 
     private void cancelEvent(ActionEvent evt) {

Lab2/src/main/java/org/lumijiez/gui/loader/BatchLoader.java

@@ -5,6 +5,7 @@ import org.lumijiez.base.Group;
 import org.lumijiez.enums.StudyField;
 import org.lumijiez.gui.util.ComponentDecorator;
 import org.lumijiez.gui.util.DisplayHandler;
+import org.lumijiez.gui.util.WindowConfig;
 import org.lumijiez.managers.Supervisor;
 
 import javax.swing.*;
@@ -52,7 +53,6 @@ public class BatchLoader extends JFrame {
         formatLabel.setText("File format example:");
         cancelButton.setText("Cancel");
 
-
         exampleText.setColumns(15);
         exampleText.setRows(5);
         exampleText.setEditable(false);
@@ -101,10 +101,7 @@ public class BatchLoader extends JFrame {
                                         .addComponent(submitButton))
                                 .addGap(23, 23, 23)));
         pack();
-        Dimension screenSize = Toolkit.getDefaultToolkit().getScreenSize();
+        WindowConfig.center(this);
-        int x = (screenSize.width - this.getWidth()) / 2;
-        int y = (screenSize.height - this.getHeight()) / 2;
-        this.setLocation(x, y);
     }
 
     private void cancelEvent(ActionEvent evt) {

Lab2/src/main/java/org/lumijiez/gui/util/WindowConfig.java

@@ -0,0 +1,13 @@
+package org.lumijiez.gui.util;
+
+import javax.swing.*;
+import java.awt.*;
+
+public class WindowConfig {
+    public static <T extends JFrame> void center(T frame) {
+        Dimension screenSize = Toolkit.getDefaultToolkit().getScreenSize();
+        int x = (screenSize.width - frame.getWidth()) / 2;
+        int y = (screenSize.height - frame.getHeight()) / 2;
+        frame.setLocation(x, y);
+    }
+}