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1、1/12 封面2/12 作者：PanHongliang 仅供个人学习全国 2010 年 10 月自学考试Java 语言程序设计（一）试卷课程代码：04747 一、单项选择题(本大题共10 小题，每小题1 分，共 10 分)在每小题列出的四个备选项中只有一个是符合题目要求的，请将其代码填写在题后的括文档编码:CK3C10H1V2N1 HT10W3M9N6A7 ZU7R8S1T2I4文档编码:CK3C10H1V2N1 HT10W3M9N6A7 ZU7R8S1T2I4文档编码:CK3C10H1V2N1 HT10W3M9N6A7 ZU7R8S1T2I4文档编码:CK3C10H1V2N1 HT10W3M
2、9N6A7 ZU7R8S1T2I4文档编码:CK3C10H1V2N1 HT10W3M9N6A7 ZU7R8S1T2I4文档编码:CK3C10H1V2N1 HT10W3M9N6A7 ZU7R8S1T2I4文档编码:CK3C10H1V2N1 HT10W3M9N6A7 ZU7R8S1T2I4文档编码:CK3C10H1V2N1 HT10W3M9N6A7 ZU7R8S1T2I4文档编码:CK3C10H1V2N1 HT10W3M9N6A7 ZU7R8S1T2I4文档编码:CK3C10H1V2N1 HT10W3M9N6A7 ZU7R8S1T2I4文档编码:CK3C10H1V2N1 HT10W3M9N6A7
3、ZU7R8S1T2I4文档编码:CK3C10H1V2N1 HT10W3M9N6A7 ZU7R8S1T2I4文档编码:CK3C10H1V2N1 HT10W3M9N6A7 ZU7R8S1T2I4文档编码:CK3C10H1V2N1 HT10W3M9N6A7 ZU7R8S1T2I4文档编码:CK3C10H1V2N1 HT10W3M9N6A7 ZU7R8S1T2I4文档编码:CK3C10H1V2N1 HT10W3M9N6A7 ZU7R8S1T2I4文档编码:CK3C10H1V2N1 HT10W3M9N6A7 ZU7R8S1T2I4文档编码:CK3C10H1V2N1 HT10W3M9N6A7 ZU7R8S
4、1T2I4文档编码:CK3C10H1V2N1 HT10W3M9N6A7 ZU7R8S1T2I4文档编码:CK3C10H1V2N1 HT10W3M9N6A7 ZU7R8S1T2I4文档编码:CK3C10H1V2N1 HT10W3M9N6A7 ZU7R8S1T2I4文档编码:CK3C10H1V2N1 HT10W3M9N6A7 ZU7R8S1T2I4文档编码:CK3C10H1V2N1 HT10W3M9N6A7 ZU7R8S1T2I4文档编码:CK3C10H1V2N1 HT10W3M9N6A7 ZU7R8S1T2I4文档编码:CK3C10H1V2N1 HT10W3M9N6A7 ZU7R8S1T2I4文
5、档编码:CK3C10H1V2N1 HT10W3M9N6A7 ZU7R8S1T2I4文档编码:CK3C10H1V2N1 HT10W3M9N6A7 ZU7R8S1T2I4文档编码:CK3C10H1V2N1 HT10W3M9N6A7 ZU7R8S1T2I4文档编码:CK3C10H1V2N1 HT10W3M9N6A7 ZU7R8S1T2I4文档编码:CK3C10H1V2N1 HT10W3M9N6A7 ZU7R8S1T2I4文档编码:CK3C10H1V2N1 HT10W3M9N6A7 ZU7R8S1T2I4文档编码:CK3C10H1V2N1 HT10W3M9N6A7 ZU7R8S1T2I4文档编码:CK
6、3C10H1V2N1 HT10W3M9N6A7 ZU7R8S1T2I4文档编码:CK3C10H1V2N1 HT10W3M9N6A7 ZU7R8S1T2I4文档编码:CK3C10H1V2N1 HT10W3M9N6A7 ZU7R8S1T2I4文档编码:CK3C10H1V2N1 HT10W3M9N6A7 ZU7R8S1T2I4文档编码:CK3C10H1V2N1 HT10W3M9N6A7 ZU7R8S1T2I4文档编码:CK3C10H1V2N1 HT10W3M9N6A7 ZU7R8S1T2I4文档编码:CK3C10H1V2N1 HT10W3M9N6A7 ZU7R8S1T2I4文档编码:CK3C10H1
7、V2N1 HT10W3M9N6A7 ZU7R8S1T2I4文档编码:CK3C10H1V2N1 HT10W3M9N6A7 ZU7R8S1T2I4文档编码:CK3C10H1V2N1 HT10W3M9N6A7 ZU7R8S1T2I4文档编码:CK3C10H1V2N1 HT10W3M9N6A7 ZU7R8S1T2I4文档编码:CK3C10H1V2N1 HT10W3M9N6A7 ZU7R8S1T2I4文档编码:CK3C10H1V2N1 HT10W3M9N6A7 ZU7R8S1T2I4文档编码:CK3C10H1V2N1 HT10W3M9N6A7 ZU7R8S1T2I4文档编码:CK3C10H1V2N1 H
8、T10W3M9N6A7 ZU7R8S1T2I4文档编码:CK3C10H1V2N1 HT10W3M9N6A7 ZU7R8S1T2I43/12 号内。错选、多选或未选均无分。1.以下是关于Java 语言关键字的叙述，其中正确的是()A.关键字可以用来描述类的成员类型，但是不能描述普通变量B.关键字由字母(包括英文字母、下划线字符、美元字符、文字字符)和数字组成C.关键字不可以用作变量、方法、类或标号的标识符D.break 和 main 都是 Java语言的关键字2.执行以下代码，输出结果是()intx=5，y=7，u=9，v=6；System.out.println(xy?x+2：uv?u-3：v
9、+2)；A.8 B.6 C.7 D.true 3.Java语言中，只限子类或者同一包中的类的方法能访问的访问权限是()A.public B.private C.protected D.4.设有数组定义int x=1，2，3，4，5，6，；，则 x.length 的值为()A.3 B.4 C.6 D.7 5.在以下 Swing 的类中，属于容器的是()A.JApplet B.JButton C.JTextArea D.JMenu 6.在以下供选择的方法中，属于接口MouseMotionListener 的方法是()A.mouseReleased()B.mouseEntered()C.mouseE
10、xited()D.mouseMoved()7.小程序要播放音频文件，可使用类()A.Audio B.JAudio C.AudioClip D.JAudioClip 8.以下是关于线程的叙述，正确的是()A.多线程的使用可以提高设备的平行工作能力，但是使系统管理变得复杂B.同一个进程下的线程都有自己的状态、专用数据段和独立的内存资源C.线程是能独立运行的程序D.进程的执行效率比线程的执行效率高9.在 Java的类库中，包含实现输入/输出操作的包是()A.java.util B.java.io C.java.applet D.java.awt 文档编码:CK3C10H1V2N1 HT10W3M9N
11、6A7 ZU7R8S1T2I4文档编码:CK3C10H1V2N1 HT10W3M9N6A7 ZU7R8S1T2I4文档编码:CK3C10H1V2N1 HT10W3M9N6A7 ZU7R8S1T2I4文档编码:CK3C10H1V2N1 HT10W3M9N6A7 ZU7R8S1T2I4文档编码:CK3C10H1V2N1 HT10W3M9N6A7 ZU7R8S1T2I4文档编码:CK3C10H1V2N1 HT10W3M9N6A7 ZU7R8S1T2I4文档编码:CK3C10H1V2N1 HT10W3M9N6A7 ZU7R8S1T2I4文档编码:CK3C10H1V2N1 HT10W3M9N6A7 ZU
12、7R8S1T2I4文档编码:CK3C10H1V2N1 HT10W3M9N6A7 ZU7R8S1T2I4文档编码:CK3C10H1V2N1 HT10W3M9N6A7 ZU7R8S1T2I4文档编码:CK3C10H1V2N1 HT10W3M9N6A7 ZU7R8S1T2I4文档编码:CK3C10H1V2N1 HT10W3M9N6A7 ZU7R8S1T2I4文档编码:CK3C10H1V2N1 HT10W3M9N6A7 ZU7R8S1T2I4文档编码:CK3C10H1V2N1 HT10W3M9N6A7 ZU7R8S1T2I4文档编码:CK3C10H1V2N1 HT10W3M9N6A7 ZU7R8S1T
13、2I4文档编码:CK3C10H1V2N1 HT10W3M9N6A7 ZU7R8S1T2I4文档编码:CK3C10H1V2N1 HT10W3M9N6A7 ZU7R8S1T2I4文档编码:CK3C10H1V2N1 HT10W3M9N6A7 ZU7R8S1T2I4文档编码:CK3C10H1V2N1 HT10W3M9N6A7 ZU7R8S1T2I4文档编码:CK3C10H1V2N1 HT10W3M9N6A7 ZU7R8S1T2I4文档编码:CK3C10H1V2N1 HT10W3M9N6A7 ZU7R8S1T2I4文档编码:CK3C10H1V2N1 HT10W3M9N6A7 ZU7R8S1T2I4文档编
14、码:CK3C10H1V2N1 HT10W3M9N6A7 ZU7R8S1T2I4文档编码:CK3C10H1V2N1 HT10W3M9N6A7 ZU7R8S1T2I4文档编码:CK3C10H1V2N1 HT10W3M9N6A7 ZU7R8S1T2I4文档编码:CK3C10H1V2N1 HT10W3M9N6A7 ZU7R8S1T2I4文档编码:CK3C10H1V2N1 HT10W3M9N6A7 ZU7R8S1T2I4文档编码:CK3C10H1V2N1 HT10W3M9N6A7 ZU7R8S1T2I4文档编码:CK3C10H1V2N1 HT10W3M9N6A7 ZU7R8S1T2I4文档编码:CK3C
15、10H1V2N1 HT10W3M9N6A7 ZU7R8S1T2I4文档编码:CK3C10H1V2N1 HT10W3M9N6A7 ZU7R8S1T2I4文档编码:CK3C10H1V2N1 HT10W3M9N6A7 ZU7R8S1T2I4文档编码:CK3C10H1V2N1 HT10W3M9N6A7 ZU7R8S1T2I4文档编码:CK3C10H1V2N1 HT10W3M9N6A7 ZU7R8S1T2I4文档编码:CK3C10H1V2N1 HT10W3M9N6A7 ZU7R8S1T2I4文档编码:CK3C10H1V2N1 HT10W3M9N6A7 ZU7R8S1T2I4文档编码:CK3C10H1V2
16、N1 HT10W3M9N6A7 ZU7R8S1T2I4文档编码:CK3C10H1V2N1 HT10W3M9N6A7 ZU7R8S1T2I4文档编码:CK3C10H1V2N1 HT10W3M9N6A7 ZU7R8S1T2I4文档编码:CK3C10H1V2N1 HT10W3M9N6A7 ZU7R8S1T2I4文档编码:CK3C10H1V2N1 HT10W3M9N6A7 ZU7R8S1T2I4文档编码:CK3C10H1V2N1 HT10W3M9N6A7 ZU7R8S1T2I4文档编码:CK3C10H1V2N1 HT10W3M9N6A7 ZU7R8S1T2I4文档编码:CK3C10H1V2N1 HT1
17、0W3M9N6A7 ZU7R8S1T2I4文档编码:CK3C10H1V2N1 HT10W3M9N6A7 ZU7R8S1T2I4文档编码:CK3C10H1V2N1 HT10W3M9N6A7 ZU7R8S1T2I4文档编码:CK3C10H1V2N1 HT10W3M9N6A7 ZU7R8S1T2I4文档编码:CK3C10H1V2N1 HT10W3M9N6A7 ZU7R8S1T2I44/12 10.在编写访问数据库的Java 程序时，ResultSet 对象的作用是()A.建立新数据库连接B.用来表示与数据库的连接C.在指定的连接中处理SQL 语句D.存储查询结果二、填空题(本大题共10 小题，每小题
18、2 分，共 20 分)请在每小题的空格中填上正确答案。错填、不填均无分。11.Java语言采用多种机制来保证可移植性，其中最主要的是_。12.程序包声明的格式是_。13.当联编推迟至运行时间实现时，该联编过程称为_。14.使用默认字节字符对应表，将字符串转化为字节数组的方法是_。15.在 Swing 中，带有滚动条的面板的类名是_。16.组合框(JComboBox)是_的组合。17.在某个组件中绘图，一般应该为这个组件所属的子类重写_方法。18.多线程互斥使用_的程序段，在操作系统中称为临界段。19.在 Java语言中，文件随机访问可以利用_类实现。20.Java程序可以用纯Java 的_驱动
19、程序，实现与数据库连接。三、简答题(本大题共6 小题，每小题3 分，共 18 分)21.请使用 for 循环语句计算S=1+的值。22.请写出 Applet 类中 init()方法的功能。23.请写出空布局安置组件的两个步骤。24.在 Swing 中，对话框有几种?并请写出它们的主要区别。25.请写出用Runnable 接口实现多线程的主要工作。26.请写出用InetAddress 类，获取网址为“”的 IP 地址的 Java语句。四、程序填空题(本大题共5 小题，每空2 分，共 20 分)27.方法 booleanisPrime(intn)的功能是判断正整数n(n1)是否为质数。static
20、 boolean isPrime(intn)int i。if(n=2)return true。if（n%2=0）return false。for(i=3。i*i=n。i+=2)if(_)break。if(_)return true。return false。28.某小应用程序窗口中有一个文本框，一个8 行 10 列的文本区以及一个按钮，点击这个按文档编码:CK3C10H1V2N1 HT10W3M9N6A7 ZU7R8S1T2I4文档编码:CK3C10H1V2N1 HT10W3M9N6A7 ZU7R8S1T2I4文档编码:CK3C10H1V2N1 HT10W3M9N6A7 ZU7R8S1T2I4
21、文档编码:CK3C10H1V2N1 HT10W3M9N6A7 ZU7R8S1T2I4文档编码:CK3C10H1V2N1 HT10W3M9N6A7 ZU7R8S1T2I4文档编码:CK3C10H1V2N1 HT10W3M9N6A7 ZU7R8S1T2I4文档编码:CK3C10H1V2N1 HT10W3M9N6A7 ZU7R8S1T2I4文档编码:CK3C10H1V2N1 HT10W3M9N6A7 ZU7R8S1T2I4文档编码:CK3C10H1V2N1 HT10W3M9N6A7 ZU7R8S1T2I4文档编码:CK3C10H1V2N1 HT10W3M9N6A7 ZU7R8S1T2I4文档编码:C
22、K3C10H1V2N1 HT10W3M9N6A7 ZU7R8S1T2I4文档编码:CK3C10H1V2N1 HT10W3M9N6A7 ZU7R8S1T2I4文档编码:CK3C10H1V2N1 HT10W3M9N6A7 ZU7R8S1T2I4文档编码:CK3C10H1V2N1 HT10W3M9N6A7 ZU7R8S1T2I4文档编码:CK3C10H1V2N1 HT10W3M9N6A7 ZU7R8S1T2I4文档编码:CK3C10H1V2N1 HT10W3M9N6A7 ZU7R8S1T2I4文档编码:CK3C10H1V2N1 HT10W3M9N6A7 ZU7R8S1T2I4文档编码:CK3C10H
23、1V2N1 HT10W3M9N6A7 ZU7R8S1T2I4文档编码:CK3C10H1V2N1 HT10W3M9N6A7 ZU7R8S1T2I4文档编码:CK3C10H1V2N1 HT10W3M9N6A7 ZU7R8S1T2I4文档编码:CK3C10H1V2N1 HT10W3M9N6A7 ZU7R8S1T2I4文档编码:CK3C10H1V2N1 HT10W3M9N6A7 ZU7R8S1T2I4文档编码:CK3C10H1V2N1 HT10W3M9N6A7 ZU7R8S1T2I4文档编码:CK3C10H1V2N1 HT10W3M9N6A7 ZU7R8S1T2I4文档编码:CK3C10H1V2N1
24、HT10W3M9N6A7 ZU7R8S1T2I4文档编码:CK3C10H1V2N1 HT10W3M9N6A7 ZU7R8S1T2I4文档编码:CK3C10H1V2N1 HT10W3M9N6A7 ZU7R8S1T2I4文档编码:CK3C10H1V2N1 HT10W3M9N6A7 ZU7R8S1T2I4文档编码:CK3C10H1V2N1 HT10W3M9N6A7 ZU7R8S1T2I4文档编码:CK3C10H1V2N1 HT10W3M9N6A7 ZU7R8S1T2I4文档编码:CK3C10H1V2N1 HT10W3M9N6A7 ZU7R8S1T2I4文档编码:CK3C10H1V2N1 HT10W3
25、M9N6A7 ZU7R8S1T2I4文档编码:CK3C10H1V2N1 HT10W3M9N6A7 ZU7R8S1T2I4文档编码:CK3C10H1V2N1 HT10W3M9N6A7 ZU7R8S1T2I4文档编码:CK3C10H1V2N1 HT10W3M9N6A7 ZU7R8S1T2I4文档编码:CK3C10H1V2N1 HT10W3M9N6A7 ZU7R8S1T2I4文档编码:CK3C10H1V2N1 HT10W3M9N6A7 ZU7R8S1T2I4文档编码:CK3C10H1V2N1 HT10W3M9N6A7 ZU7R8S1T2I4文档编码:CK3C10H1V2N1 HT10W3M9N6A7
26、 ZU7R8S1T2I4文档编码:CK3C10H1V2N1 HT10W3M9N6A7 ZU7R8S1T2I4文档编码:CK3C10H1V2N1 HT10W3M9N6A7 ZU7R8S1T2I4文档编码:CK3C10H1V2N1 HT10W3M9N6A7 ZU7R8S1T2I4文档编码:CK3C10H1V2N1 HT10W3M9N6A7 ZU7R8S1T2I4文档编码:CK3C10H1V2N1 HT10W3M9N6A7 ZU7R8S1T2I4文档编码:CK3C10H1V2N1 HT10W3M9N6A7 ZU7R8S1T2I4文档编码:CK3C10H1V2N1 HT10W3M9N6A7 ZU7R8
27、S1T2I4文档编码:CK3C10H1V2N1 HT10W3M9N6A7 ZU7R8S1T2I4文档编码:CK3C10H1V2N1 HT10W3M9N6A7 ZU7R8S1T2I45/12 钮时，在文本框中输入的内容会追加到文本区中。import java.applet.*。import javax.swing.*。import java,awt.event.*。public class TextAPP extends Applet implements ActionListener JTextField input。JTextArea display。JButton append。publi
28、c void init()input=new JTextField(10)。display=new。append=new JButton(追加)。add(input)。add(display)。add(append)。input.requestFocus()。display.setLineWrap(true)。append.addActionListener(this)。public void actionPerformed(ActionEvent e),display.(input.getText()+)。29.某小应用程序有一个由3 个单选按钮组成的颜色选择组，当选中某种颜色时，窗口的背景
29、颜色将作相应的变化。这里给出的是窗口子类My Window的定义的框架以及其构造函数的定义。class MyWindow extends JFrame implements MyWindow(String s)super(s)。Container con=this.getContentPane()。con.setLayout(new GridLayout(3,2)。this.setLocation(100,100)。this.setSize(400,400)。panel 1=new Panel l()。label l=new JLabel(改变前景颜色,JLabel.CENTER)。con.a
30、dd(label 1)。con.。panel 1.box 1.addltemListener(this)。panel 1.box 2.addItemListener(this)。panel 1.box 3.addItemListener(this)。this.setVisible(true)。this.pack()。文档编码:CK3C10H1V2N1 HT10W3M9N6A7 ZU7R8S1T2I4文档编码:CK3C10H1V2N1 HT10W3M9N6A7 ZU7R8S1T2I4文档编码:CK3C10H1V2N1 HT10W3M9N6A7 ZU7R8S1T2I4文档编码:CK3C10H1V2
31、N1 HT10W3M9N6A7 ZU7R8S1T2I4文档编码:CK3C10H1V2N1 HT10W3M9N6A7 ZU7R8S1T2I4文档编码:CK3C10H1V2N1 HT10W3M9N6A7 ZU7R8S1T2I4文档编码:CK3C10H1V2N1 HT10W3M9N6A7 ZU7R8S1T2I4文档编码:CK3C10H1V2N1 HT10W3M9N6A7 ZU7R8S1T2I4文档编码:CK3C10H1V2N1 HT10W3M9N6A7 ZU7R8S1T2I4文档编码:CK3C10H1V2N1 HT10W3M9N6A7 ZU7R8S1T2I4文档编码:CK3C10H1V2N1 HT1
32、0W3M9N6A7 ZU7R8S1T2I4文档编码:CK3C10H1V2N1 HT10W3M9N6A7 ZU7R8S1T2I4文档编码:CK3C10H1V2N1 HT10W3M9N6A7 ZU7R8S1T2I4文档编码:CK3C10H1V2N1 HT10W3M9N6A7 ZU7R8S1T2I4文档编码:CK3C10H1V2N1 HT10W3M9N6A7 ZU7R8S1T2I4文档编码:CK3C10H1V2N1 HT10W3M9N6A7 ZU7R8S1T2I4文档编码:CK3C10H1V2N1 HT10W3M9N6A7 ZU7R8S1T2I4文档编码:CK3C10H1V2N1 HT10W3M9N
33、6A7 ZU7R8S1T2I4文档编码:CK3C10H1V2N1 HT10W3M9N6A7 ZU7R8S1T2I4文档编码:CK3C10H1V2N1 HT10W3M9N6A7 ZU7R8S1T2I4文档编码:CK3C10H1V2N1 HT10W3M9N6A7 ZU7R8S1T2I4文档编码:CK3C10H1V2N1 HT10W3M9N6A7 ZU7R8S1T2I4文档编码:CK3C10H1V2N1 HT10W3M9N6A7 ZU7R8S1T2I4文档编码:CK3C10H1V2N1 HT10W3M9N6A7 ZU7R8S1T2I4文档编码:CK3C10H1V2N1 HT10W3M9N6A7 ZU
34、7R8S1T2I4文档编码:CK3C10H1V2N1 HT10W3M9N6A7 ZU7R8S1T2I4文档编码:CK3C10H1V2N1 HT10W3M9N6A7 ZU7R8S1T2I4文档编码:CK3C10H1V2N1 HT10W3M9N6A7 ZU7R8S1T2I4文档编码:CK3C10H1V2N1 HT10W3M9N6A7 ZU7R8S1T2I4文档编码:CK3C10H1V2N1 HT10W3M9N6A7 ZU7R8S1T2I4文档编码:CK3C10H1V2N1 HT10W3M9N6A7 ZU7R8S1T2I4文档编码:CK3C10H1V2N1 HT10W3M9N6A7 ZU7R8S1T
35、2I4文档编码:CK3C10H1V2N1 HT10W3M9N6A7 ZU7R8S1T2I4文档编码:CK3C10H1V2N1 HT10W3M9N6A7 ZU7R8S1T2I4文档编码:CK3C10H1V2N1 HT10W3M9N6A7 ZU7R8S1T2I4文档编码:CK3C10H1V2N1 HT10W3M9N6A7 ZU7R8S1T2I4文档编码:CK3C10H1V2N1 HT10W3M9N6A7 ZU7R8S1T2I4文档编码:CK3C10H1V2N1 HT10W3M9N6A7 ZU7R8S1T2I4文档编码:CK3C10H1V2N1 HT10W3M9N6A7 ZU7R8S1T2I4文档编
36、码:CK3C10H1V2N1 HT10W3M9N6A7 ZU7R8S1T2I4文档编码:CK3C10H1V2N1 HT10W3M9N6A7 ZU7R8S1T2I4文档编码:CK3C10H1V2N1 HT10W3M9N6A7 ZU7R8S1T2I4文档编码:CK3C10H1V2N1 HT10W3M9N6A7 ZU7R8S1T2I4文档编码:CK3C10H1V2N1 HT10W3M9N6A7 ZU7R8S1T2I4文档编码:CK3C10H1V2N1 HT10W3M9N6A7 ZU7R8S1T2I4文档编码:CK3C10H1V2N1 HT10W3M9N6A7 ZU7R8S1T2I4文档编码:CK3C
37、10H1V2N1 HT10W3M9N6A7 ZU7R8S1T2I4文档编码:CK3C10H1V2N1 HT10W3M9N6A7 ZU7R8S1T2I46/12 30.某小应用程序的界面有两个按钮，点击“画圆”按钮，程序在窗口画一个圆，点击“画矩形”按钮，程序在窗口画一个矩形。import java.applet.*。import java.awt.*。import java.awt.event.*。import javax.swing.*。public class Class l extends Applet implements ActionListener boolean c=false。
38、int r=50,a=50,b=50。JButton bl,b2。public void init()setSize(200,200)。setBackground(Color.blue)。b1=new JButton(画圆)。b2=new JButton(画矩形)。b1.addActionListener(this)。b2.addActionListener(this)。add(b1)。add(b2)。setVisible(true)。public void(Graphics g)g.clearRect(70,100,130,200)。g.setColor(Color.red)。if(c)g.
39、drawRoundRect(70,100,r,r,r,r)。else g.drawRect(70,100,a,b)。public void update(Graphics g)paint(g)。public void actionPerformed(ActionEvent e)if(e.getSource()=b1)c=true。else if(e.getSource()=b2)c=false。；31.某按钮的监视器方法actionPerformed()实现将文本区中的内容写入到文本文件myText.txt中。public void actionPerformed(ActionEvent e)
40、try int n=txtFld.getText().length()。byte buffer=new byten。文档编码:CK3C10H1V2N1 HT10W3M9N6A7 ZU7R8S1T2I4文档编码:CK3C10H1V2N1 HT10W3M9N6A7 ZU7R8S1T2I4文档编码:CK3C10H1V2N1 HT10W3M9N6A7 ZU7R8S1T2I4文档编码:CK3C10H1V2N1 HT10W3M9N6A7 ZU7R8S1T2I4文档编码:CK3C10H1V2N1 HT10W3M9N6A7 ZU7R8S1T2I4文档编码:CK3C10H1V2N1 HT10W3M9N6A7 Z
41、U7R8S1T2I4文档编码:CK3C10H1V2N1 HT10W3M9N6A7 ZU7R8S1T2I4文档编码:CK3C10H1V2N1 HT10W3M9N6A7 ZU7R8S1T2I4文档编码:CK3C10H1V2N1 HT10W3M9N6A7 ZU7R8S1T2I4文档编码:CK3C10H1V2N1 HT10W3M9N6A7 ZU7R8S1T2I4文档编码:CK3C10H1V2N1 HT10W3M9N6A7 ZU7R8S1T2I4文档编码:CK3C10H1V2N1 HT10W3M9N6A7 ZU7R8S1T2I4文档编码:CK3C10H1V2N1 HT10W3M9N6A7 ZU7R8S1
42、T2I4文档编码:CK3C10H1V2N1 HT10W3M9N6A7 ZU7R8S1T2I4文档编码:CK3C10H1V2N1 HT10W3M9N6A7 ZU7R8S1T2I4文档编码:CK3C10H1V2N1 HT10W3M9N6A7 ZU7R8S1T2I4文档编码:CK3C10H1V2N1 HT10W3M9N6A7 ZU7R8S1T2I4文档编码:CK3C10H1V2N1 HT10W3M9N6A7 ZU7R8S1T2I4文档编码:CK3C10H1V2N1 HT10W3M9N6A7 ZU7R8S1T2I4文档编码:CK3C10H1V2N1 HT10W3M9N6A7 ZU7R8S1T2I4文档
43、编码:CK3C10H1V2N1 HT10W3M9N6A7 ZU7R8S1T2I4文档编码:CK3C10H1V2N1 HT10W3M9N6A7 ZU7R8S1T2I4文档编码:CK3C10H1V2N1 HT10W3M9N6A7 ZU7R8S1T2I4文档编码:CK3C10H1V2N1 HT10W3M9N6A7 ZU7R8S1T2I4文档编码:CK3C10H1V2N1 HT10W3M9N6A7 ZU7R8S1T2I4文档编码:CK3C10H1V2N1 HT10W3M9N6A7 ZU7R8S1T2I4文档编码:CK3C10H1V2N1 HT10W3M9N6A7 ZU7R8S1T2I4文档编码:CK3
44、C10H1V2N1 HT10W3M9N6A7 ZU7R8S1T2I4文档编码:CK3C10H1V2N1 HT10W3M9N6A7 ZU7R8S1T2I4文档编码:CK3C10H1V2N1 HT10W3M9N6A7 ZU7R8S1T2I4文档编码:CK3C10H1V2N1 HT10W3M9N6A7 ZU7R8S1T2I4文档编码:CK3C10H1V2N1 HT10W3M9N6A7 ZU7R8S1T2I4文档编码:CK3C10H1V2N1 HT10W3M9N6A7 ZU7R8S1T2I4文档编码:CK3C10H1V2N1 HT10W3M9N6A7 ZU7R8S1T2I4文档编码:CK3C10H1V
45、2N1 HT10W3M9N6A7 ZU7R8S1T2I4文档编码:CK3C10H1V2N1 HT10W3M9N6A7 ZU7R8S1T2I4文档编码:CK3C10H1V2N1 HT10W3M9N6A7 ZU7R8S1T2I4文档编码:CK3C10H1V2N1 HT10W3M9N6A7 ZU7R8S1T2I4文档编码:CK3C10H1V2N1 HT10W3M9N6A7 ZU7R8S1T2I4文档编码:CK3C10H1V2N1 HT10W3M9N6A7 ZU7R8S1T2I4文档编码:CK3C10H1V2N1 HT10W3M9N6A7 ZU7R8S1T2I4文档编码:CK3C10H1V2N1 HT
46、10W3M9N6A7 ZU7R8S1T2I4文档编码:CK3C10H1V2N1 HT10W3M9N6A7 ZU7R8S1T2I4文档编码:CK3C10H1V2N1 HT10W3M9N6A7 ZU7R8S1T2I4文档编码:CK3C10H1V2N1 HT10W3M9N6A7 ZU7R8S1T2I4文档编码:CK3C10H1V2N1 HT10W3M9N6A7 ZU7R8S1T2I4文档编码:CK3C10H1V2N1 HT10W3M9N6A7 ZU7R8S1T2I4文档编码:CK3C10H1V2N1 HT10W3M9N6A7 ZU7R8S1T2I47/12 buffer=txtFid.getText
47、().getBytes()。FileOutputStream wf=new(myText.txt)。wf.write(buffer,0,n)。catch(IOException ioe)txtFld.setText(ioe.toString()。五、程序分析题(本大题共5 小题，每小题4 分，共 20 分)32.阅读下列程序，请写出该程序的输出结果。public class A int m=5。static int n=3。public static void main(String args)A obj 1=new A()。A obj2=new A()。objl.m*=2。objl.n*=4
48、。obj2.m+=1。obj2.n+=6。System.out.println(obj 1.m=+obj 1.m)。System.out.println(obj 1.n=+obj 1.n)。System.out.println(obj2.m=+obj2.m)。System.out.println(obj2.n=+obj2.n)。33.阅读下列程序，请写出该程序的输出结果。class Test33 static int merger(int a,int b,int c)int i=0,j=0,k=0。while(i a.length&j b.length)if(ai bj)ck+=ai+。els
49、e ck+=bj+。while(i a.length)ck+=ai+。while(j b.length)ck+=bj+。return k。public static void main(String args)int a=3,6,9。int b=1,2,5。int c=new int100。int p=merger(a,b,c)。文档编码:CK3C10H1V2N1 HT10W3M9N6A7 ZU7R8S1T2I4文档编码:CK3C10H1V2N1 HT10W3M9N6A7 ZU7R8S1T2I4文档编码:CK3C10H1V2N1 HT10W3M9N6A7 ZU7R8S1T2I4文档编码:CK3
50、C10H1V2N1 HT10W3M9N6A7 ZU7R8S1T2I4文档编码:CK3C10H1V2N1 HT10W3M9N6A7 ZU7R8S1T2I4文档编码:CK3C10H1V2N1 HT10W3M9N6A7 ZU7R8S1T2I4文档编码:CK3C10H1V2N1 HT10W3M9N6A7 ZU7R8S1T2I4文档编码:CK3C10H1V2N1 HT10W3M9N6A7 ZU7R8S1T2I4文档编码:CK3C10H1V2N1 HT10W3M9N6A7 ZU7R8S1T2I4文档编码:CK3C10H1V2N1 HT10W3M9N6A7 ZU7R8S1T2I4文档编码:CK3C10H1V