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statement=connection.prepareStatement("SELECT prix_loge FROM Liste WHERE  N°_loge=?");
			    	 statement.setString(1, comboBox_1.getSelectedItem().toString());
 
						ResultSet rs=statement.executeQuery();
						prix.setText(rs.getString("prix_loge"));
						prix.getText();
						statement.close();
 
					statement=connection.prepareStatement("SELECT Verse_total FROM Versement WHERE  Nom=? AND Prenom=?");
			    	 statement.setString(1, comboBox_1.getSelectedItem().toString());
					 statement.setString(2, comboBox_2.getSelectedItem().toString());
						ResultSet rs1=statement.executeQuery();
					somme.setText(rs1.getString("Verse_total"));
					somme.getText();
					statement.close();
 
					DecimalFormatSymbols symbols = new DecimalFormatSymbols(Locale.getDefault());
					symbols.setGroupingSeparator('.');//simple space
 
					DecimalFormat df = new DecimalFormat("#,###.00", symbols);
					double one = df.parse(prix.getText()).doubleValue();
 
					double two= df.parse(somme.getText()).doubleValue();
 
					double tree =df.parse(verse.getText()).doubleValue();
 
					double r=two+tree; 
 
					String r1= String.valueOf(r);
					BigDecimal r2=new BigDecimal(r1);
					String str = df.format(r2);
					String t=str.replace(",", ",").replaceAll(" ", " ");
 
 
					double r11= one-(two+tree); 
					String r22= String.valueOf(r11);
					BigDecimal r21=new BigDecimal(r22);
					String str1 = df.format(r21);
					String t1=str1.replace(",", ",").replaceAll(" ", " ");
 
			 statement = connection.prepareStatement("INSERT INTO Versement ( Nom , Prenom, Date , Somme_versee,Prix_loge, Nom_projet, Verse_total, Verse_restant,id_verse) VALUES(?,?,?,'"+verse.getText()+"','" +  prix.getText() +"', (SELECT Nom_projet From Client WHERE Nom= ? AND Prenom= ?), (?) , (?),?) ");            
 
			 statement.setString(1, comboBox_1.getSelectedItem().toString());
			 statement.setString(2, comboBox_2.getSelectedItem().toString());
			 statement.setString(3, date.getText());
			 statement.setString(4, comboBox_1.getSelectedItem().toString());
			 statement.setString(5, comboBox_2.getSelectedItem().toString());
			 statement.setString(6, t);	
			 statement.setString(7, t1);	
			 statement.setString(8, comboBox_4.getSelectedItem().toString());
 
 
			 statement.executeUpdate();
 
 
			    statement.close();
			    statement.close();
 
 
			 statement= connection.prepareStatement("UPDATE Liste SET Verse_total=?, Verse_restant=?, Verse_2=( SELECT(Somme_versee) FROM Versement WHERE Nom=? AND Prenom=? AND id_verse=2),Verse_3= (SELECT(Somme_versee) FROM Versement WHERE Nom=? AND Prenom=? AND id_verse=3),Verse_4= (SELECT(Somme_versee) FROM Versement WHERE Nom=? AND Prenom=? AND id_verse=4),Verse_5= (SELECT(Somme_versee) FROM Versement WHERE Nom=? AND Prenom=? AND id_verse=5),Verse_6= (SELECT(Somme_versee) FROM Versement WHERE Nom=? AND Prenom=? AND id_verse=6),Verse_7= (SELECT(Somme_versee) FROM Versement WHERE Nom=? AND Prenom=? AND id_verse=7), Date_2=(SELECT Date FROM Versement WHERE Nom=? AND Prenom=? AND id_verse=2),Date_3=(SELECT Date FROM Versement WHERE Nom=? AND Prenom=? AND id_verse=3), Date_4=(SELECT Date FROM Versement WHERE Nom=? AND Prenom=? AND id_verse=4),Date_5=(SELECT Date FROM Versement WHERE Nom=? AND Prenom=? AND id_verse=5),Date_6=(SELECT Date FROM Versement WHERE Nom=? AND Prenom=? AND id_verse=6), Date_7=(SELECT Date FROM Versement WHERE Nom=? AND Prenom=? AND id_verse=7) WHERE Nom=? AND Prenom= ? " );
 
			 statement.setString(1, t);
			 statement.setString(2, t1);
			 statement.setString(3, comboBox_1.getSelectedItem().toString());
			 statement.setString(4, comboBox_2.getSelectedItem().toString());
 
 
			 statement.setString(5, comboBox_1.getSelectedItem().toString());
 
			 statement.setString(6, comboBox_2.getSelectedItem().toString());
			 statement.setString(7, comboBox_1.getSelectedItem().toString());
			 statement.setString(8, comboBox_2.getSelectedItem().toString());
			 statement.setString(9, comboBox_1.getSelectedItem().toString());
			 statement.setString(10, comboBox_2.getSelectedItem().toString());
			 statement.setString(11, comboBox_1.getSelectedItem().toString());
			 statement.setString(12, comboBox_2.getSelectedItem().toString());
			 statement.setString(13, comboBox_1.getSelectedItem().toString());
			 statement.setString(14, comboBox_2.getSelectedItem().toString());
			 statement.setString(15, comboBox_1.getSelectedItem().toString());
			 statement.setString(16, comboBox_2.getSelectedItem().toString());
 
 
 
			 statement.executeUpdate();
 
        	   statement.close();
 
 
			  statement= connection.prepareStatement("UPDATE Projet  SET Encaissement= (SELECT Verse_total From Liste WHERE Nom_projet=?) WHERE Nom_projet=?"  );
			    statement.setString(1, comboBox.getSelectedItem().toString());
			    statement.setString(2, comboBox.getSelectedItem().toString());
			    statement.executeUpdate();
 
			    statement.close();
				 JOptionPane.showMessageDialog(null, "Versement ajouté");
			    comboBox_1.setSelectedItem("");
				  comboBox_2.setSelectedItem("");
				  comboBox_4.setSelectedItem("");
				  date.setText("");
				  verse.setText("");
 
					statement= connection.prepareStatement("SELECT * FROM Versement ");
 
				ResultSet rs11= statement.executeQuery();
 
					table.setModel(DbUtils.resultSetToTableModel(rs11));
 
					 table.setAutoResizeMode(JTable.AUTO_RESIZE_OFF); table.getColumn("Nom").setPreferredWidth(160);   
					 table.setAutoResizeMode(JTable.AUTO_RESIZE_OFF); table.getColumn("Prenom").setPreferredWidth(160);   
					 table.setAutoResizeMode(JTable.AUTO_RESIZE_OFF); table.getColumn("Nom_projet").setPreferredWidth(120);   
					 table.setAutoResizeMode(JTable.AUTO_RESIZE_OFF); table.getColumn("Somme_versee").setPreferredWidth(160);   
					 table.setAutoResizeMode(JTable.AUTO_RESIZE_OFF); table.getColumn("id_verse").setPreferredWidth(50);   
			         table.setAutoResizeMode(JTable.AUTO_RESIZE_OFF); table.getColumn("Prix_loge").setPreferredWidth(160);   
					 table.setAutoResizeMode(JTable.AUTO_RESIZE_OFF); table.getColumn("Verse_restant").setPreferredWidth(160); 
					 table.setAutoResizeMode(JTable.AUTO_RESIZE_OFF); table.getColumn("Verse_total").setPreferredWidth(160); 
					 table.setAutoResizeMode(JTable.AUTO_RESIZE_OFF); table.getColumn("Date").setPreferredWidth(100); 
 
 
 
					statement.close();
 
 
				    connection.close();
 
 
 
			      }
 
 
				catch(SQLException e1)
				{
 
				  System.err.println(e1.getMessage());
				  JOptionPane.showMessageDialog(null, "Element non ajouté");
 
 
 
				} catch (ParseException e) {
					// TODO Auto-generated catch block
					e.printStackTrace();
				}
en éxecutant le code j'ai comme erreur :ResultSet closed