• 2022-06-08 问题

    创建一个标识有“关闭”按钮的语句是( )。 A: JTextField button = new JTextField("关闭"); B: JButton button = new JButton("关闭"); C: JLabel button = new JLabel ("关闭"); D: JCheckbox button = new JCheckbox("关闭");

    创建一个标识有“关闭”按钮的语句是( )。 A: JTextField button = new JTextField("关闭"); B: JButton button = new JButton("关闭"); C: JLabel button = new JLabel ("关闭"); D: JCheckbox button = new JCheckbox("关闭");

  • 2022-07-25 问题

    新建一个流对象,下列( )选项的代码是错误的。 A: new BufferedWriter(new FileWriter("a.txt")); B: new BufferedReader(new FileInputStream("a.dat")); C: new DataOutputStream(new FileOutputStream("a.txt")); D: new ObjectInputStream(new FileInputStream("a.dat"));

    新建一个流对象,下列( )选项的代码是错误的。 A: new BufferedWriter(new FileWriter("a.txt")); B: new BufferedReader(new FileInputStream("a.dat")); C: new DataOutputStream(new FileOutputStream("a.txt")); D: new ObjectInputStream(new FileInputStream("a.dat"));

  • 2022-05-29 问题

    下列哪个选项是创建一个标识有“关闭”按钮的语句?   ( ) A: JTextField b = new JTextField("关闭");   B: JTextArea b = new JTextArea ("关闭"); C: JButton b = new JButton("关闭");   D: JCheckbox b = new JCheckbox("关闭");

    下列哪个选项是创建一个标识有“关闭”按钮的语句?   ( ) A: JTextField b = new JTextField("关闭");   B: JTextArea b = new JTextArea ("关闭"); C: JButton b = new JButton("关闭");   D: JCheckbox b = new JCheckbox("关闭");

  • 2022-06-19 问题

    点击页面的按钮,使之打开一个新窗口,加载一个网页,以下JavaScript代码中可行的是( )。 A: <input type="button" value="new" onclick="window.location='new.html';"/> B: <input type="button" value="new" onclick=" location.assign('new.html');"/> C: <form target="_blank" action="new.html"> <input type="submit" value="new"/> </form> D: <input type="button" value="new" onclick="open('new.html', '_blank') "/>

    点击页面的按钮,使之打开一个新窗口,加载一个网页,以下JavaScript代码中可行的是( )。 A: <input type="button" value="new" onclick="window.location='new.html';"/> B: <input type="button" value="new" onclick=" location.assign('new.html');"/> C: <form target="_blank" action="new.html"> <input type="submit" value="new"/> </form> D: <input type="button" value="new" onclick="open('new.html', '_blank') "/>

  • 2022-06-18 问题

    定义并初始化一个用于存放我们国家的四个直辖市的数组cityName,四个直辖市为:北京,上海,天津,重庆. 正确的是_________ A: String[] cityName=new String[4]{"北京","上海","天津","重庆"}; B: String[] cityName=new String[]{"北京","上海","天津","重庆"}; C: String[] cityName={"北京","上海","天津","重庆"}; D: String cityName = new String[4] { "北京", "上海", "天津", "重庆" };

    定义并初始化一个用于存放我们国家的四个直辖市的数组cityName,四个直辖市为:北京,上海,天津,重庆. 正确的是_________ A: String[] cityName=new String[4]{"北京","上海","天津","重庆"}; B: String[] cityName=new String[]{"北京","上海","天津","重庆"}; C: String[] cityName={"北京","上海","天津","重庆"}; D: String cityName = new String[4] { "北京", "上海", "天津", "重庆" };

  • 2022-06-11 问题

    下列定义字符串数组的语法正确的是( )? A: String[] list = new String[]{"red", "yellow", "green"}; B: String list = new String{"red", "yellow", "green"}; C: String list = {"red", "yellow", "green"}; D: String[] list = {"red", "yellow", "green"};

    下列定义字符串数组的语法正确的是( )? A: String[] list = new String[]{"red", "yellow", "green"}; B: String list = new String{"red", "yellow", "green"}; C: String list = {"red", "yellow", "green"}; D: String[] list = {"red", "yellow", "green"};

  • 2022-06-08 问题

    下面选项中,用于设置浏览器显示文本采用UTF-8编码的是 ( ) A: response.setHeader("Content-Type","text/html;charset=utf-8"); B: request.setHeader("Content-Type","text/html;charset=utf-8"); C: response.setHeader("Content-Type"," charset=utf-8"); D: request.setHeader("Content-Type"," charset=utf-8");

    下面选项中,用于设置浏览器显示文本采用UTF-8编码的是 ( ) A: response.setHeader("Content-Type","text/html;charset=utf-8"); B: request.setHeader("Content-Type","text/html;charset=utf-8"); C: response.setHeader("Content-Type"," charset=utf-8"); D: request.setHeader("Content-Type"," charset=utf-8");

  • 2022-06-29 问题

    下列代码中给出正确的在方法体内抛出异常的是( )。 A: new throw Exception(" "); B: throw new Exception(" "); C: throws IOException(); D: throws IOException;

    下列代码中给出正确的在方法体内抛出异常的是( )。 A: new throw Exception(" "); B: throw new Exception(" "); C: throws IOException(); D: throws IOException;

  • 2022-06-26 问题

    下列定义字体对象ft的语句中,正确的是___________。 A: Dim ft As New Font("隶书", 18) B: Dim ft As Font = New Font("隶书", 18) C: Dim ft As Font = ("隶书", 18) D: Dim ft("隶书", 18) As Font E: Dim ft = Font ("隶书", 18)

    下列定义字体对象ft的语句中,正确的是___________。 A: Dim ft As New Font("隶书", 18) B: Dim ft As Font = New Font("隶书", 18) C: Dim ft As Font = ("隶书", 18) D: Dim ft("隶书", 18) As Font E: Dim ft = Font ("隶书", 18)

  • 2022-05-28 问题

    下列方法中,能正确创建 JavaScript 对象的是( )。 A: var txt = new Object[name:"George",price:25] B: var txt = new Object(name:"George",price:25) C: var txt = new Object{name:"George",price:25} D: var txt = new Object({name:"George",price:25})

    下列方法中,能正确创建 JavaScript 对象的是( )。 A: var txt = new Object[name:"George",price:25] B: var txt = new Object(name:"George",price:25) C: var txt = new Object{name:"George",price:25} D: var txt = new Object({name:"George",price:25})

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