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1、第八章第1题分四个部分分别建四个Java文本（1）publicclassApplication{publicstaticvoidmain(String[]args){newMyFrame("对话框实践");}}（2）importjava.awt.*;importjava.awt.event.*;publicclassExceptionDialogextendsDialogimplementsActionListener{Buttonbtn;publicExceptionDialog(Framef){super(f,"Exception!
2、",true);btn=newButton("close");Labellabel=newLabel("输入格式有误!",Label.CENTER);add(label,BorderLayout.CENTER);add(btn,BorderLayout.SOUTH);btn.addActionListener(this);addWindowListener(newWindowAdapter(){publicvoidwindowClosing(WindowEvente){setVisible(false);}});pack();setLo
3、cation(500,330);setResizable(false);}publicvoidactionPerformed(ActionEvente){setVisible(false);}}（3）importjava.awt.*;importjava.awt.event.*;publicclassMyDialogextendsDialog{Buttonyes,no;Labellabel;Stringmess=null;publicMyDialog(Framef,booleanb){super(f,"信息提示",b);label=ne
4、wLabel("您输入的数字>1000!!!是否输入?");label.setAlignment(Label.CENTER);Containercon=newContainer();con.setLayout(newGridLayout(1,2));yes=newButton("OK");yes.setForeground(Color.red);no=newButton("Cancle");no.setForeground(Color.red);con.add(yes);con.add(no);add(label,BorderLayou
5、t.CENTER);add(con,BorderLayout.SOUTH);addWindowListener(newWindowAdapter(){publicvoidwindowClosing(WindowEvente){setVisible(false);}});pack();setResizable(false);setLocation(510,330);}publicvoidsetMess(Stringmess){this.mess=mess;this.label.setText("您输入的数字"+this.mess+">10
6、00!!!是否输入?");}publicStringgetMess(){returnthis.mess;}publicButtongetYes(){returnthis.yes;}publicButtongetNo(){returnthis.no;}publicvoidsetHide(){yes.setVisible(false);no.setVisible(false);}}（4）importjava.awt.*;importjava.awt.event.*;publicclassMyFrameextendsFrameimplemen
7、tsActionListener{MyDialogmodelDialog;ExceptionDialogexception;TextFieldnum;TextAreadis;publicMyFrame(Stringtitle){super(title);modelDialog=newMyDialog(this,true);exception=newExceptionDialog(this);num=newTextField(20);dis=newTextArea(10,10);dis.setEnabled(false);add(num,
8、BorderLayout.NORTH);add(dis,BorderLayout.CENTER);num.addActionListener(this);modelDialog.getYes().addAc
