小编Wal*_*ker的帖子

Button button = new Button("Show Text");
button.setOnAction(new EventHandler<ActionEvent>(){
    @Override
    public void handle(ActionEvent event) {
        Platform.runLater(new Runnable(){
            @Override
            public void run() {
                field.setText("START");
            }
       });

        try {
            Thread.sleep(5000);
        } catch (InterruptedException ex) {
            Logger.getLogger(Main.class.getName()).log(Level.SEVERE, null, ex);
        }

        Platform.runLater(new Runnable(){
            @Override
            public void run() {
                field.setText("END");
            }
        });
        }
});

运行上面的代码后,field.setText("START")没有执行,我的意思是textfield没有将其文本设置为"START",为什么？怎么解决这个？