Fehlerhandling eingebaut bei keiner Budget eingabe

Budget Projekt/src/MeinBudgetView/MeinGui.java

@@ -28,6 +28,7 @@ import javax.swing.border.MatteBorder;
 import javax.swing.border.BevelBorder;
 import javax.swing.border.TitledBorder;
 import javax.swing.UIManager;
+import static javax.swing.JOptionPane.showMessageDialog;
 
 public class MeinGui extends JFrame implements ActionListener {
 
@@ -276,15 +277,23 @@ public class MeinGui extends JFrame implements ActionListener {
 
 	@Override
 	public void actionPerformed(ActionEvent ae) {
+		try {
+			budget = Double.parseDouble(text1.getText());	
+		} catch (Exception e) {
+			showMessageDialog(null, "Sie müssen ihr Budget eingeben!");
+		}
+
 		
 		if (ae.getSource() == this.exit) {
 			exitButton();
 		}
+		
 		if (ae.getSource() == this.loeschen) {
 			leeren();
 		}
 		
-		budget = Double.parseDouble(text1.getText());
+
+		
 		if (ae.getSource() == this.senden && (text1 != null && text2 != null)) {
 			budgetDispaly.setText(setBudgetView());
 		}
@@ -307,18 +316,23 @@ public class MeinGui extends JFrame implements ActionListener {
 	}
 
 	private void erspartesHinzufuegen() {	
-		erspartes += (budget - expenses); 
-		budget = 0.0;
-		expenses = 0.0;
-		balance = 0.0;
-		text1.setText(null);
-		text2.setText(null);
-		budgetDispaly.setText("0.0 \u20AC");
-		expensesDisplay.setText("0.0 \u20AC");
-		balanceDisplay.setText("0.0 \u20AC");
-		savingsDisplay.setText(Double.toString(erspartes));
-		textExpensesName.setText(null);
-		((DefaultTableModel) myTable.getModel()).setRowCount(0);
+	    try {
+	    	erspartes += (budget - expenses); 
+			budget = 0.0;
+			expenses = 0.0;
+			balance = 0.0;
+			text1.setText(null);
+			text2.setText(null);
+			budgetDispaly.setText("0.0 \u20AC");
+			expensesDisplay.setText("0.0 \u20AC");
+			balanceDisplay.setText("0.0 \u20AC");
+			savingsDisplay.setText(Double.toString(erspartes));
+			textExpensesName.setText(null);
+			((DefaultTableModel) myTable.getModel()).setRowCount(0);
+	      } catch (Exception e) {
+	    	  showMessageDialog(null, "Sie müssen ihr Budget und ihre Ausgaben eingeben!");
+	      }
+
 		
 	}