почему try не видит catch?

import java.lang.*;
import java.io.*;
import java.util.*;
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
 class ouuyy {
	private JFrame window;
    private JPanel mainPanel,inputPanel,   buttonPanel;
	 private JTextField jtxtNum1,jtxtNum2;
	 private JLabel  jlblNum1Caption,jlblNum2Caption;
	 private JButton jbtndey;
	 public ouuyy() {
        window = new JFrame("Калькулятор");
 window.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
window.setResizable(false);
 mainPanel = new JPanel(new BorderLayout());
       inputPanel = new JPanel();
        buttonPanel = new JPanel();
 inputPanel.setLayout(new GridLayout(1, 4));

        buttonPanel.setLayout(new GridLayout(2, 4, 5, 5));
  mainPanel.add(inputPanel, BorderLayout.NORTH);
        mainPanel.add(buttonPanel, BorderLayout.CENTER);
 window.getContentPane().add(mainPanel);
   window.pack();
        window.setLocationRelativeTo(null);
        window.setVisible(true);

    }
    ActionListener oty =  new ouyy();

    public void addButtonsAndTextFields() {

        jbtndey = new JButton("deystvio");
   jlblNum2Caption = new JLabel("ответ:       ", JLabel.RIGHT);


        jtxtNum1 = new JTextField("");

	     jtxtNum2 = new JTextField("");
	       jbtndey.addActionListener(oty);

	        buttonPanel.add(jbtndey);

	inputPanel.add(jlblNum1Caption);
        inputPanel.add(jtxtNum1);
	inputPanel.add(jlblNum2Caption);
        inputPanel.add(jtxtNum2);
}

private class ouyy implements ActionListener{

   @Override
    public void actionPerformed(ActionEvent event) {

        if (event.getSource() == jbtndey) {
            dey();
		}}

    }
	public void dey() {


	   String sstr = jtxtNum1.getText();
	String[] stringss = sstr.split(" ");
	Stack<Double> stack = new Stack<Double>();
	for (int i = 0; i < stringss.length; i++)
     {
	try
	{

	stack.push(Double.parseDouble(stringss[i]));}
	return true;}
		}
		catch (NumberFormatException ex)
		{

		double tmp1 = stack.pop();
		double tmp2 = stack.pop();
	return false;
}}

	}
class zep{
 public static void main(String[] args) {
ouuyy ouyyyyy = new ouuyy();
}
}