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e826. 获得和设置JSplitPane分开的位置
Thelocationofadividerismeasuredinpixelsfromeithertheleftedge(inthecaseofahorizontalsplitpane)orthetopedge(inthecaseofaverticalsplitpane).Therearetwowaystosetthelocationofthedivider.Thefirstistospecifyanabsolutelocationbasedonthedistanceinpixelsfromtheleftortopedge.Thesecondistospecifyaproportionallocationbasedonthedistancefromtheleftortopedge.Forexample,aproportionallocationof0setsthedividerattheleftortopedge.Aproportionallocationof1setsthedividerattherightorbottomedge.Aproportionallocationof.5s...
e788. 取消JSpinner的键盘编辑能力
//CreateanummberspinnerJSpinnerspinner=newJSpinner();//DisablekeyboardeditsinthespinnerJFormattedTextFieldtf=((JSpinner.DefaultEditor)spinner.getEditor()).getTextField();tf.setEditable(false);//Thepreviouscallsetsthebackgroundtoadisabled//color(usuallygray).Tochangethisdisabledcolor,//resetthebackgroundcolor.tf.setBackground(Color.white);//Thevalueofthespinnercanstillbeprogrammaticallychangedspinner.setValue(newInteger(100)); RelatedExamples...
e790. 设置JSpinner的边框
//CreateanumberspinnerJSpinnerspinner=newJSpinner();//GetthetextfieldJFormattedTextFieldtf=((JSpinner.DefaultEditor)spinner.getEditor()).getTextField();//Setthemargin(addtwospacestotheleftandrightsideofthevalue)inttop=0;intleft=2;intbottom=0;intright=2;Insetsinsets=newInsets(top,left,bottom,right);tf.setMargin(insets); RelatedExamples...
e787. 用JSpinner实现小时选择
//CreateacalendarobjectandinitializetoaparticularhourifdesiredCalendarcalendar=newGregorianCalendar();calendar.set(Calendar.HOUR_OF_DAY,13);//1pm//CreateadatespinnerthatcontrolsthehoursSpinnerDateModeldateModel=newSpinnerDateModel(calendar.getTime(),null,null,Calendar.HOUR_OF_DAY);JSpinnerspinner=newJSpinner(dateModel);//GetthedateformatterJFormattedTextFieldtf=((JSpinner.DefaultEditor)spinner.getEditor()).getTextField();DefaultFormatterFactoryfactory=(DefaultFormatterFactory)tf.getFormatterFact...
e793. 监听JSpinner数据变化
//CreateanummberspinnerJSpinnerspinner=newJSpinner();//Addthelistenerspinner.addChangeListener(newSpinnerListener());//Changingthevalueprogrammaticallyalsofiresaneventspinner.setValue(newInteger(100));publicclassSpinnerListenerimplementsChangeListener{publicvoidstateChanged(ChangeEventevt){JSpinnerspinner=(JSpinner)evt.getSource();//GetthenewvalueObjectvalue=spinner.getValue();}} RelatedExamples...
e791. 为JSpinner定制编辑器
Thisexamplereplacesthedefaulteditor(aJFormattedTextField)inaspinnercomponentwithacustomeditor.Thecustomeditorissimplyapanelthatdisplaysacolor.ThenameofthecolortodisplayisstoredinaSpinnerListModel.//CreateacolorspinnerColorSpinnerspinner=newColorSpinner(newString[]{"red","green","blue"});//Changetheselectedcolorspinner.setValue("blue");publicclassColorSpinnerextendsJSpinner{publicColorSpinner(String[]colorNames){super();setModel(newSpinnerListModel(colorNames));setEditor(newEditor(this));}publicc...
e786. 创建JSpinner组件
Thisexampledemonstrateshowtobuildthreekindsofspinners.Anumberspinner://CreateanumberspinnerJSpinnerspinner=newJSpinner();//Setitsvaluespinner.setValue(newInteger(100));Alistspinner://CreatealistspinnerSpinnerListModellistModel=newSpinnerListModel(newString[]{"red","green","blue"});spinner=newJSpinner(listModel);//Setitsvaluespinner.setValue("blue");Adatespinner://CreateadatespinnerSpinnerDateModeldateModel=newSpinnerDateModel();spinner=newJSpinner(dateModel);//Setitsvaluetojan12000Calendarcalend...
考虑下面两个JSP文件代码片断： test1.jsp:
<HTML> <BODY> <%pageContext.setAttribute(”ten”,newInteger(10));%> //1 </BODY> </HTML> test2.jsp: 数字为：<%=pageContext.getAttribute(”ten”)%> 以下（）放置在test1.jsp中的//1处，当请求test1.jsp时正确输出test2.jsp中的内容。 A．<jsp:includepage=”test2.jsp”/> B．<jsp:forwordpage=”test2.jsp”/> C．<%@includefile=”test2.jsp”%> D．由于pageContext对象的scope属性为page,所以test2.jsp不能访问test1.jsp定义的属性 解答：C pageContextsetAttrib...