[填空题] 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。
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JTextField result=new JTextField();
JComboBox pick=new JComboBox();
public Selectltem()
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 newPi