java Swing丢失异常

Question

当我启动模态对话框时，当它出现渲染异常时，该异常会出现。我可以在调用对话框的代码中捕获它吗。setVisible（）

另外，我知道线程。setUncaughtExceptionHandler，我需要从调用该对话框的代码中捕获它

请提前通知，谢谢，安德烈

public class TestSwing {
    public static void main(String[] args) {
        SwingUtilities.invokeLater(new Runnable() {
            @Override
            public void run() {
                try {
                    JDialog jDialog = new JDialog();
                    JTable table = new JTable();
                    table.setModel(new DefaultTableModel() {
                        @Override public int getColumnCount() {return 1;}
                        @Override public int getRowCount() {return 1;}
                        @Override
                        public Object getValueAt(int row, int column) {
                            throw new RuntimeException("Hello");
                        }
                    });

                    jDialog.add(table);
                    jDialog.setModal(true);
                    jDialog.pack();
                    jDialog.setVisible(true);

                    System.out.println("dialog closed");

                } catch (Exception e) {
                    e.printStackTrace();
                    System.out.println("got it");
               }

           }
        });
    }
}

Answer 1

不能，因为异常不在对话框中，而是在线程中。对话setVisible（）会等待对话框变为不可见，但不要停止当前线程。但我有一个小诀窍，它可能会帮助你获得想要的行为

public class TestSwing {
    public static void main(String[] args) {
        SwingUtilities.invokeLater(new Runnable() {
            @Override
            public void run() {
                try {
                    JDialog jDialog = new JDialog();
                    JTable table = new JTable();
                    table.setModel(new DefaultTableModel() {
                        @Override public int getColumnCount() {return 1;}
                        @Override public int getRowCount() {return 1;}
                        @Override
                        public Object getValueAt(int row, int column) {
                            throw new RuntimeException("Hello");
                        }
                    });

                    jDialog.add(table);
                    jDialog.setModal(true);
                    jDialog.pack();
                    Thread.setDefaultUncaughtExceptionHandler(new Thread.UncaughtExceptionHandler() {

                        @Override
                        public void uncaughtException(Thread t, Throwable e) {
                            jDialog.setVisible(false);
                            Thread.setDefaultUncaughtExceptionHandler(null);
                            throw new RuntimeException(e);
                        }
                    });
                    jDialog.setVisible(true);

                    System.out.println("dialog closed");

                } catch (Exception e) {
                    e.printStackTrace();
                    System.out.println("got it");
               }

           }
        });
    }
}