4 课后答案【khdaw_lxywyl】(18)

class DiaObj implements ActionListener { Frame fr=new Frame(); TextArea txtAr2=new TextArea(8,10); TextField txtFl=new TextField(20);

Button btnSend=new Button("发送文字"); Dialog dia;

//初始化DiaObj,并定义参数fr,txtAr2 public DiaObj(Frame fr,TextArea txtAr2){ this.txtAr2=txtAr2; this.fr=fr; o dia=new Dialog(fr,"传递消息对话框..",true); dia.setSize(200,100); dia.setLayout(new FlowLayout()); c dia.add(txtFl); dia.add(btnSend); 网

btnSend.addActionListener(this); 案

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答

w dia.addWindowListener(new WindowAdapter(){ public void windowClosing(WindowEvent 后

课

awe){ dia.setVisible(false); d

//退出对话框 }} ); dia.validate(); dia.setVisible(true); } h

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public void actionPerformed(ActionEvent e){ k txtAr2.append(txtFl.getText()+"\n"); txtFl.setText("");//清空内容 w } }

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