start

src/Hinzufügen.java

@@ -23,9 +23,6 @@ public class Hinzufügen extends JFrame implements ActionListener {
         this.setLayout(null);
 
 
-        String[][] temp = {{""}};
-        t = new DefaultTableModel();
-        table = new JTable(t);
 
         a = new JButton("Zurück");
         a.setBounds(50, 30, 80, 50);
@@ -70,12 +67,12 @@ public class Hinzufügen extends JFrame implements ActionListener {
                             }
                         }
 
-                        if (i == z -1) {
+                        if (i == z - 1) {
                             spalten = spalten + "'" + b[i].getText() + "'";
-                            sname =sname+rm.getColumnName(i+1);
+                            sname = sname + rm.getColumnName(i + 1);
                         } else {
                             spalten = spalten + "'" + b[i].getText() + "',";
-                            sname =sname+rm.getColumnName(i+1)+",";
+                            sname = sname + rm.getColumnName(i + 1) + ",";
                         }
 
 
@@ -85,30 +82,23 @@ public class Hinzufügen extends JFrame implements ActionListener {
                 }
                 System.out.println(sname);
                 System.out.println(spalten);
-                String sql = "Insert into " + tab + "("+sname+") Values (" + spalten + ")";
+                String sql = "Insert into " + tab + "(" + sname + ") Values (" + spalten + ")";
                 Connection conn = null;
                 try {
                     conn = DriverManager.getConnection(url, "root", "");
                     Statement s = conn.createStatement();
                     ResultSet a = s.executeQuery(sql);
                     this.dispose();
-                   // Tabellen.this.remove(table);
                     Tabellen.einfügen(tab);
-                    Tabellen.table.repaint();
                 } catch (SQLException ex) {
                     throw new RuntimeException(ex);
                 }
-
-
-
             });
             this.add(einf);
 
         } catch (SQLException e) {
             throw new RuntimeException(e);
         }
-
-
     }
 
     @Override

src/Tabellen.java

@@ -1,18 +1,19 @@
 import javax.swing.*;
+import javax.swing.event.TableModelEvent;
+import javax.swing.event.TableModelListener;
 import javax.swing.table.DefaultTableModel;
+import javax.swing.table.JTableHeader;
 import java.awt.event.*;
 import java.sql.*;
 
-public class Tabellen extends JFrame implements ActionListener {
+public class Tabellen extends JFrame implements TableModelListener {
     JScrollPane sc = null;
     JButton a = null;
-
-    JButton änd = null;
     JButton einf = null;
     JButton del = null;
     static ResultSetMetaData rm = null;
-    static JTable table = null;
+    static DefaultTableModel t = new DefaultTableModel();
-    static DefaultTableModel t = null;
+    static JTable table =new JTable(t);
     static ResultSet r = null;
     static String url = "jdbc:mariadb://127.0.0.1:3306/bundesliga";
 
@@ -24,6 +25,7 @@ public class Tabellen extends JFrame implements ActionListener {
 
 
         einfügen(tab);
+
         sc = new JScrollPane(table);
         sc.setBounds(50, 100, 400, 350);
         sc.getHorizontalScrollBar();
@@ -43,17 +45,11 @@ public class Tabellen extends JFrame implements ActionListener {
         einf.addActionListener(e -> {
             Hinzufügen d = new Hinzufügen(r, tab);
             d.setVisible(true);
-            {
+            this.setFocusable(false);
-            }
+
         });
         this.add(einf);
 
-        änd = new JButton("Ändern");
-        änd.setBounds(170, 480, 100, 50);
-        änd.addActionListener(e -> {
-
-        });
-        this.add(änd);
 
         del = new JButton("Löschen");
         del.setBounds(290, 480, 100, 50);
@@ -63,12 +59,44 @@ public class Tabellen extends JFrame implements ActionListener {
 
         });
         this.add(del);
+
+        t.addTableModelListener(e->{
+            int zeile =table.getSelectedRow();
+            int spalte = table.getSelectedColumn();
+            if(spalte>0 && zeile >0){
+                int response = JOptionPane.showConfirmDialog(null, "Wollen Sie dein Eintrag in Zeile " + (zeile+1) +", Spalte "+(spalte +1)+ " ändern?", "Bestätigen", JOptionPane.YES_NO_OPTION, JOptionPane.QUESTION_MESSAGE);
+                if (response == 0) {
+                    try (Connection conn = DriverManager.getConnection(url, "root", "")) {
+                        Statement s = conn.createStatement();
+                        System.out.println(t.getColumnName(spalte)+"\n"+rm.getColumnTypeName(spalte+1));
+                        if(rm.getColumnTypeName(spalte+1).equalsIgnoreCase("Varchar")){
+                            ResultSet r = s.executeQuery("Update " + tab + " set " + t.getColumnName(spalte) + "= '" + t.getValueAt(zeile, spalte).toString() + "' WHERE " + t.getColumnName(0) + " = " + t.getValueAt(zeile, 0));
+
+                        } else if (rm.getColumnTypeName(spalte+1).equalsIgnoreCase("Date")) {
+                            ResultSet r = s.executeQuery("Update " + tab + " set " + t.getColumnName(spalte) + "= '" + t.getValueAt(zeile, spalte).toString() + "' WHERE " + t.getColumnName(0) + " = " + t.getValueAt(zeile, 0));
+
+                        }else {
+                            ResultSet r = s.executeQuery("Update " + tab + " set " + t.getColumnName(spalte) + "= " + t.getValueAt(zeile, spalte).toString() + " WHERE " + t.getColumnName(0) + " = " + t.getValueAt(zeile, 0));
+
+                        }
+                        t.removeTableModelListener(this::tableChanged);
+                    } catch (SQLException f) {
+                        throw new RuntimeException(f);
+                    }
+                    t.fireTableDataChanged();
+                } else if (response == 1) {
+                    einfügen(tab);
+                    t.fireTableDataChanged();
+                }
+
+            }
+
+        });
     }
 
     public static void einfügen(String tab) {
         String[][] temp = {{""}};
-        t = new DefaultTableModel();
+
-        table = new JTable(t);
 
         try (Connection conn = DriverManager.getConnection(url, "root", "")) {
             Statement s = conn.createStatement();
@@ -91,8 +119,7 @@ public class Tabellen extends JFrame implements ActionListener {
 
                 }
                 t.addRow(rows);
-                t.fireTableRowsInserted(0, table.getRowCount());
+                t.fireTableDataChanged();
-                table.repaint();
 
             }
 
@@ -102,9 +129,11 @@ public class Tabellen extends JFrame implements ActionListener {
 
     }
 
-
     @Override
-    public void actionPerformed(ActionEvent e) {
+    public void tableChanged(TableModelEvent e) {
+        System.out.println(table.getSelectedRow()+"" +table.getSelectedColumn());
+
+
 
     }
 }

src/Ändern.java

@@ -0,0 +1,2 @@
+public class Ändern {
+}