阅读下面程序段，SelectItem应用程序显示从文本域的组合框中进行选择，请在程序中的画线处添上正确的语句使得程序能够正确运行。 ... JTextField result = new JTextField（　）; JComboBox pick = new JComboBox （　）; public SelectItem（　） { super ("Select Item"); pick.addItemListener(this); pick.addItem("Navigtor"); pick.addItem("Internet Explorer"); pick.addItem("Opera"); pick.setEditable(false); result.setHorizontalAlignment(SwingConstants.CENTER); result, setEditable (false); pane.setLayout(new BorderLayout（　）); 【12】 pane.add(pick,"Center"); pane.add(result,"South"); setContentPane(pane); } public void itemStateChanged(ItemEvent evt) { Object source = evt.getSource（　）; if(source == pick) { Object newPick = evt.getItem（　）; result .setText(newPick.toString（　）+" is the selection. "); } repaint（　）; }

题库:计算机等级考试 类型:填空题 时间:2017-07-03 16:55:16 免费下载:《填空》Word试卷

阅读下面程序段，SelectItem应用程序显示从文本域的组合框中进行选择，请在程序中的画线处添上正确的语句使得程序能够正确运行。 ... JTextField result = new JTextField（　）; JComboBox pick = new JComboBox （　）; public SelectItem（　） { super ("Select Item"); pick.addItemListener(this); pick.addItem("Navigtor"); pick.addItem("Internet Explorer"); pick.addItem("Opera"); pick.setEditable(false); result.setHorizontalAlignment(SwingConstants.CENTER); result, setEditable (false); pane.setLayout(new BorderLayout（　）); 【12】 pane.add(pick,"Center"); pane.add(result,"South"); setContentPane(pane); } public void itemStateChanged(ItemEvent evt) { Object source = evt.getSource（　）; if(source == pick) { Object newPick = evt.getItem（　）; result .setText(newPick.toString（　）+" is the selection. "); } repaint（　）; }

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