0809第1学期java高级编程卷答案

1、2008 年2009 年第一学期Java 高级编程期末试题A 卷一、单项选择题（每题 2 分，共 30 分）1-5B C B A C6-10B B C D D11-15 C D B A A二、填空题（每题 1.5 分，共 30 分）run()X x1=new X();3. stream socket 4. 10datagram socket5. javacbytecode.classcharacter streamspublicWhat a pleasure! I am TomHow do you do?9.Appletg.setFont(f); javac aaa.javajJava App

2、licationaaa.javaMyclassJava Appletjava bbb三、简答题（共 25 分）1. What are method overloading and method overriding? Please give ex them.(10 分)les to describeAnswers:The exle of overloading： class A private Sting name,no; public void setInfo(String n)name=n; public void setInfo(String n1,String n2) name=n1;

3、no=n2; Then setInfo method is overloading.The exle of overriding:class Aprivate String name; public void pr()System.out.prln(“name is :”+name); class B extends Aprivate String no; public void pr()supr();System.out.prln(“no is:”,no);The prmethod in class B is overriding the prmethod in class A.2. (6

4、分)Answers:x2, x4 可能存在精度损失x5 整数太大3. How is an applet (TestApplet.class) deployed in a WShow code. (9 分)ge with the applet tag? PleaseAnswers:四、编程题（共 15 分）import import importpublicjava.awt.*; java.awt.event.*; javax.swing.*;class CalcuGUI public JFrame JLabel JLabelJLabelsic void main(String args)frm

5、=new JFrame();l1=new l2=newl3=newJLabel(每人需缴纳的班费); JLabel(班级总人数);JLabel(班级总的班费);JTextFieldJTextField JTextFieldt1=newt2=new t3=newJTextField(,10);JTextField(,10);JTextField(,10);t3.setEditable(false);JButton b1=new JButton(计算班费); Font f=new Font(宋体,Font.BOLD,28);JPanel JPanel JPanelJPanelp1=new p2=n

6、ew p3=newp4=newJPanel();JPanel();JPanel();JPanel();p1.setLayout(new FlowLayout();p2.setLayout(new p3.setLayout(new p4.setLayout(new l1.setFont(f); l2.setFont(f); t1.setFont(f); t2.setFont(f); b1.setFont(f); l3.setFont(f);t3.setFont(f);FlowLayout(); FlowLayout();FlowLayout();b1.addActionListener(new

7、ButtonHandler1(t1,t2,t3);p1.add(l1);p2.add(l2);p1.add(t1);p2.add(t2);p3.add(l3); p3.add(t3); p4.add(b1);GridLayout mygrid=new GridLayout(4,1); frm.setLayout(mygrid); frm.getContentPane().add(p1); frm.getContentPane().add(p2); frm.getContentPane().add(p3);frm.getContentPane().add(p4);frm.setSize(300,200);frm.setVisible(true);classButtonHandler1 implementionListenerprivate JTextField t1,t2,t3;public ButtonHandler1(JTextField t1,JTextField this.t1=t1;this.t2=t2; this.t3=t3;public void actionPerformed(ActionEvent e)