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final Browser browser = new Browser();        BrowserView browserView = new BrowserView(browser);        JFrame frame = new JFrame();        frame.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);        frame.add(browserView, BorderLayout.CENTER);        frame.setSize(700, 500);        frame.setLocationRelativeTo(null);        frame.setVisible(true);        browser.addLoadListener(new LoadAdapter() {            @Override            public void onFinishLoadingFrame(FinishLoadingEvent event) {                if (event.isMainFrame()) {                    browser.executeJavaScript("alert('java調用了js')");                }            }        });        browser.loadURL("E:/workspace48/browser/test.html");