java一个比较垃圾的计算器

package zouYe2;


import javax.swing.*;
import java.awt.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;

public class A5 {
    public static void main(String[] args) {
        Jframe jframe = new Jframe("垃圾计算器");
        Container container = jframe.getContentPane();

        FlowLayout flowLayout = new FlowLayout();
        jframe.setLayout(flowLayout);

        Dimension dimension = new Dimension(480, 100);
        Dimension p = new Dimension(150,30);
        JTextField jTextField = new JTextField("0");

        jTextField.setPreferredSize(dimension);
        container.add(jTextField);

        String[] number = {"7", "8", "9", "4", "5", "6", "1", "2", "3", "0",};
        for (int i = 0; i < number.length; i++) {
            JButton jButton = new JButton(number[i]);
            container.add(jButton);
            jButton.setPreferredSize(p);

            jButton.addActionListener(new ActionListener() {
                @Override
                public void actionPerformed(ActionEvent e) {
                    double n2, n1;
                    n2 = Double.parseDouble(jTextField.getText());
                    n1 = Double.parseDouble(jButton.getText());
                    jTextField.setText((n2 * 10 + n1) + "");
                }
            });
        }
        JButton jButton3 = new JButton(".");
        container.add(jButton3);
        jButton3.setPreferredSize(p);
        jButton3.addActionListener(new ActionListener() {
            @Override
            public void actionPerformed(ActionEvent e) {
                double n = Double.parseDouble(jTextField.getText());
                jTextField.setText(n + ".");
            }
        });


        String[] number1 = {"+", "-", "*", "/", "%"};
        JButton jButton2 = new JButton("=");
        jButton2.setPreferredSize(p);
        for (int i = 0; i < number1.length; i++) {
            JButton jButton1 = new JButton(number1[i]);
            container.add(jButton1);
            container.add(jButton2);
            jButton1.addActionListener(new ActionListener() {
                @Override
                public void actionPerformed(ActionEvent e) {
                    double n = Double.parseDouble(jTextField.getText());
                    String chars = jButton1.getText();
                    switch (chars) {
                        case "+":
                            jTextField.setText("0");
                            jButton2.addActionListener(new ActionListener() {
                                @Override
                                public void actionPerformed(ActionEvent e) {
                                    double n1 = Double.parseDouble(jTextField.getText());
                                    jTextField.setText(n+n1+"");
                                }
                            });
                            break;
                        case "-":
                            jTextField.setText("0");
                            jButton2.addActionListener(new ActionListener() {
                                @Override
                                public void actionPerformed(ActionEvent e) {
                                    double n1 = Double.parseDouble(jTextField.getText());
                                    jTextField.setText(n-n1+"");
                                }
                            });
                            break;
                        case "*":
                            jTextField.setText("0");
                            jButton2.addActionListener(new ActionListener() {
                                @Override
                                public void actionPerformed(ActionEvent e) {
                                    double n1 = Double.parseDouble(jTextField.getText());
                                    jTextField.setText(n*n1+"");
                                }
                            });
                            break;
                        case "/":
                            jTextField.setText("0");
                            jButton2.addActionListener(new ActionListener() {
                                @Override
                                public void actionPerformed(ActionEvent e) {
                                    double n1 = Double.parseDouble(jTextField.getText());
                                    jTextField.setText(n/n1+"");
                                }
                            });
                            break;
                        case "%":
                            jTextField.setText("0");
                            jButton2.addActionListener(new ActionListener() {
                                @Override
                                public void actionPerformed(ActionEvent e) {
                                    double n1 = Double.parseDouble(jTextField.getText());
                                    jTextField.setText(n%n1+"");
                                }
                            });
                            break;
                        default:
                    }
                }
            });
           jButton1.setPreferredSize(p);
        }

        jframe.setLocationRelativeTo(null);
        jframe.setSize(600, 800);
        jframe.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
        jframe.setVisible(true);


    }
}

//目前由于用了double型导致不能计算小数

//以后能力够时会进行修复