小编use*_*987的帖子

这个程序被用来创建电影列表.电影正在添加按钮添加按钮(JButton),还有Erease按钮女巫被禁止清除Jtextfield.代码编译但它只显示空白的JFrame.我错过了什么？(Java导入存在,但是它们会占用太多空间来粘贴它们)

public class SamodzielnaListaOsob extends JFrame  implements ActionListener {

JButton add, erease;
JTextField film;
DefaultListModel<String> listFilm;

public SamodzielnaListaOsob(String title){
    super(title);

        setDefaultCloseOperation(EXIT_ON_CLOSE);


        final JTextField film = new JTextField("Tutaj wpisz tytul filmu", 10);
        film.setBorder(BorderFactory.createTitledBorder(null, "Film"));

        JPanel p1 = new JPanel();
            p1.add(film);


        JButton add = new JButton("Dodaj do listy");
            add.addActionListener(new ActionListener(){
                @Override
                public void actionPerformed(ActionEvent e) {
                            String nowyFilm = film.getText();
                                if (nowyFilm !=""){
                                    listFilm.addElement(nowyFilm);
                                    film.setText("");
                                }
                }
            });
            JButton erease = new JButton("Wyczysc pole");
                erease.addActionListener(new ActionListener(){
                    @Override
                    public void actionPerformed(ActionEvent e) { …