《JAVA程序设计》实验报告

1、JAVA程序设计实验报告1姓名学号日期实验题目输出自己姓名年龄身高体重，通过控制台和Eclipse运行程序初稿package schooltext;public class MyselfPrint public static void main(String args) System.out.println( 18160cm100 );所遇问题及解决办法调试后的程序代码package schooltext;public class MyselfPrint public static void main(String args) System.out.println( 18160cm100 );

2、输出结果 18160cm100 JAVA程序设计实验报告2姓名杨仕琴学号54121022日期10.13实验题目打印水仙花数程序初稿public class test1 public static void main(String args) for (int j1 = 0; j1 10; j1+) for (int j2 = 0; j2 10; j2+) for (int j3 = 0; j3 10; j3+) int i=(j1+j2*10+j3*100);int o=(j1*j1*j1+j2*j2*j2+j3*j3*j3);if (i=o) System.out.println(i);所遇

3、问题及解决办法第一次输出结果：03701371153407调试后的程序代码public static void main(String args) for (int j1 = 0; j1 10; j1+) for (int j2 = 0; j2 10; j2+) for (int j3 = 1; j3 10; j3+) int i=(j1+j2*10+j3*100);int o=(j1*j1*j1+j2*j2*j2+j3*j3*j3);if (i=o) System.out.println(i);输出结果370371153407JAVA程序设计实验报告3姓名杨仕琴学号54121022日期10.

4、13实验题目编写三个类,按照命名空间规则分别放到不同包中,在代码中调用其它包中的类,并查看类文件在系统中的组织方式程序初稿package unit3_1;public class Fish public Fish()System.out.println(i am fish from package 1);package unit3_2;public class Bird public Bird()System.out.println(i am bird from package 2);package unit3_3;public class Pig public Pig()System.out

5、.println(i am pig from package 3);package unit3_3;import unit3_1.Fish;import unit3_2.Bird;public class Unit3Demo public static void main(String args) Fish f = new Fish();Bird b = new Bird();Pig p = new Pig();System.out.println(f.getClass().getResource(/).getPath();System.out.println(b.getClass().get

6、Resource(/).getPath();System.out.println(p.getClass().getResource(/).getPath();所遇问题及解决办法调试后的程序代码输出结果i am fish from package 1i am bird from package 2i am pig from package 3/C:/Users/Administrator/Desktop/jsoft/jd1210.yangshi/bin/C:/Users/Administrator/Desktop/jsoft/jd1210.yangshi/bin/C:/Users/Adminis

7、trator/Desktop/jsoft/jd1210.yangshi/bin/JAVA程序设计实验报告4姓名杨仕琴学号54121022日期10.13实验题目编写三个类ComputerTime,Plane,Car007和一个接口程序Common.要求在未来如果增加第三种交通工具,不必修改之前任何程序,只要编写新的交通工具代码.从命令行输入ComputerTime的四个参数,第一个是交通工具的类型,二到三是整数A,B,C.程序初稿package unit4;public abstract class Common2 implements Common double A = 0;double B

8、= 0;double C = 0;public void setA(double a) A = a;public void setB(double b) B = b;public void setC(double c) C = c;public abstract void TestV();package unit4;public class Plane2 extends Common2 public void TestV() double v = A + B + C;System.out.println(Plane + v);package unit4;public class Car0072

9、 extends Common2 public void TestV() double v;v = A * B / C;System.out.println(car007 + v);package unit4;public class ComputerTime2 public static void main(String args) 所遇问题及解决办法主函数传参问题,询问同学和网友获得解答调试后的程序代码package unit4;public interface Common public void TestV();package unit4;import java.util.Scanne

10、r;public class Car007 implements Common double A = 0;double B = 0;double C = 0;public void setA(double a) A = a;public void setB(double b) B = b;public void setC(double c) C = c;public void TestV() double v;v = A * B / C;System.out.println(car007 + v);package unit4;import java.util.Set;public class

11、Plane implements Common double A = 0;double B = 0;double C = 0;public void setA(double a) A = a;public void setB(double b) B = b;public void setC(double c) C = c;public void TestV() double v = A + B + C;System.out.println(Plane + v);package unit4;public class ComputerTime public static void main(Str

12、ing args) throws InstantiationException,IllegalAccessException, ClassNotFoundException Plane com = (Plane) Class.forName(unit4.Plane).newInstance();double A = Double.parseDouble(args1);double B = Double.parseDouble(args2);double C = Double.parseDouble(args3);com.setA(A);com.setB(B);com.setC(C);com.T

13、estV();输出结果JAVA程序设计实验报告5姓名杨仕琴学号54121022日期10.13实验题目编写Calculater.java，实现一个简单计算器，要求布局，可以完成加减乘除。程序初稿package unit5;import java.awt.*;import java.awt.event.*;import javax.swing.*;import java.io.*;import java.math.*;import java.util.*;/* * Title: 用户应用界面计算器 * Description: 包含简易计算与功能更加强大的科学计算 * Copyright: Cop

14、yright (c) 2008 * Company: 四学 * author chwencong * version 1.0 */ public class Calculat static JTextField show;/设置输入区，显示区 static double opNum = 0;/存放操作数 static String opChar = =;/存放操作符 static boolean flag = true;/设置标志 public static void main(String args) new EasyFrame();/产生首界面简易计算器 所遇问题及解决办法流布局方面。解决

15、办法：看书加上问老师调试后的程序代码package unit5;import java.awt.*;import java.awt.event.*;import javax.swing.*;public class Calculater extends JFrame implements ActionListener private JPanel jPanel1,jPanel2; private JTextField resultField; private JButton s1,s2,s3,s4,s5,s6,s7,s8,s9,s0,b1,b2,b3,b4,f1,f2; private boo

16、lean end,add,sub,mul,div; private String str; private double num1,num2; public Calculater() super(Calculater); setSize(300,240); Container con=getContentPane(); con.setLayout(new BorderLayout(); jPanel1=new JPanel(); jPanel1.setLayout(new GridLayout(1,1); jPanel2=new JPanel(); jPanel2.setLayout(new

17、GridLayout(4,4); resultField=new JTextField(0); jPanel1.add(resultField); con.add(jPanel1,BorderLayout.NORTH); s1=new JButton( 1 ); s1.addActionListener(this); s2=new JButton( 2 ); s2.addActionListener(this); s3=new JButton( 3 ); s3.addActionListener(this); s4=new JButton( 4 ); s4.addActionListener(

18、this); s5=new JButton( 5 ); s5.addActionListener(this); s6=new JButton( 6 ); s6.addActionListener(this); s7=new JButton( 7 ); s7.addActionListener(this); s8=new JButton( 8 ); s8.addActionListener(this); s9=new JButton( 9 ); s9.addActionListener(this); s0=new JButton( 0 ); s0.addActionListener(this);

19、 b1=new JButton( + ); b1.addActionListener(this); b2=new JButton( - ); b2.addActionListener(this); b3=new JButton( * ); b3.addActionListener(this); b4=new JButton( / ); b4.addActionListener(this); f1=new JButton( . ); f1.addActionListener(this); f2=new JButton( = ); f2.addActionListener(this); jPane

20、l2.add(s1); jPanel2.add(s2); jPanel2.add(s3); jPanel2.add(b1); jPanel2.add(s4); jPanel2.add(s5); jPanel2.add(s6); jPanel2.add(b2); jPanel2.add(s7); jPanel2.add(s8); jPanel2.add(s9); jPanel2.add(b3); jPanel2.add(s0); jPanel2.add(f1); jPanel2.add(f2); jPanel2.add(b4); con.add(jPanel2,BorderLayout.CENT

21、ER); public void num(int i) String s = null; s=String.valueOf(i); if(end) /如果数字输入结束，则将文本框置零，重新输入 resultField.setText(0); end=false; if(resultField.getText().equals(0) /如果文本框的内容为零，则覆盖文本框的内容 resultField.setText(s); else /如果文本框的内容不为零，则在内容后面添加数字 str = resultField.getText() + s; resultField.setText(str);

22、 public void actionPerformed(ActionEvent e) /数字事件 if(e.getSource()=s1) num(1); else if(e.getSource()=s2) num(2); else if(e.getSource()=s3) num(3); else if(e.getSource()=s4) num(4); else if(e.getSource()=s5) num(5); else if(e.getSource()=s6) num(6); else if(e.getSource()=s7) num(7); else if(e.getSour

23、ce()=s8) num(8); else if(e.getSource()=s9) num(9); else if(e.getSource()=s0) num(0); /符号事件 else if(e.getSource()=b1) sign(1); else if(e.getSource()=b2) sign(2); else if(e.getSource()=b3) sign(3); else if(e.getSource()=b4) sign(4); /等号 else if(e.getSource()=f1) str=resultField.getText(); if(str.index

24、Of(.)= 0) try Scanner sc = new Scanner(System.in);i = sc.nextInt(); catch (InputMismatchException e) i = 0;if (i = 0) if (i != 999) sum = sum + i;System.out.println(sum); else break; else throw new MyException(i, sum);public static class MyException extends Exception public MyException(int i1, int s

25、um1) throws MyException i1 = 0;i = i1;sum = sum1;goOn();public static void main(String args) Sumget sumget = new Sumget(); try sumget.goOn(); catch (MyException e) e.printStackTrace();输出结果JAVA程序设计实验报告7姓名杨仕琴学号54121022日期10.13实验题目程序初稿package unit7;public class Book private String name;private double si

26、nglePrice;public String getName() return name;public double getSinglePrice() return singlePrice;public void setName(String name) = name;public void setSinglePrice(double singlePrice) this.singlePrice = singlePrice;package unit7;public class Books Book book;private int num;public Book getBo

27、ok() return book;public int getNum() return num;public void setBook(Book book) this.book = book;public void setNum(int num) this.num = num;package unit7;import java.util.HashMap;import java.util.Iterator;import java.util.Map;import java.util.Scanner;public class ShopCart private Map book3 = new Hash

28、Map(); /每个购物车一个单独的HashMap放东西int MaxOrder = 2;int order = 1;public Map getBook3() / 返回一个购物车中的HashMapreturn book3;public void addBooks() / 向购物车中的HashMap添加Books对象，数目不大于MaxOrderwhile (order = MaxOrder) System.out.println(请输入书名回车结束);Scanner sc1 = new Scanner(System.in);String str = sc1.next();System.out.

29、println(请输入该书单价回车结束);Scanner sc2 = new Scanner(System.in);double dou = sc2.nextDouble();System.out.println(请输入该书购买数目回车结束);Scanner sc3 = new Scanner(System.in);int i = sc3.nextInt();Books book1 = new Books();Book book2 = new Book();book2.setName(str);book2.setSinglePrice(dou);book1.setBook(book2);boo

30、k1.setNum(i);book3.put(order, book1);order+;public void getSum(HashMap bookss) /取得购物车HashMap中的信息算出总价格double sum = 0.0;Books book5 = new Books();for (Iterator iterator = bookss.keySet().iterator(); iterator.hasNext();) book5 = (Books)iterator.next();sum += (book5.getNum() * (book5.getBook().getSingle

31、Price();System.out.println(sum);package unit7;import java.util.HashMap;import java.util.Iterator;import java.util.Map;import java.util.Scanner;public class ShopCartDemo public static void main(String args) ShopCart shop=new ShopCart();/新建一个购物车shop.addBooks(); /购物车中加东西HashMap book4=(HashMap)shop.getB

32、ook3(); shop.getSum(book4); /购物车算总价所遇问题及解决办法While 条件写错，找了好久。调试后的程序代码package unit7;public class Book private String name;private double singlePrice;public String getName() return name;public double getSinglePrice() return singlePrice;public void setName(String name) = name;public void setSi

33、nglePrice(double singlePrice) this.singlePrice = singlePrice;package unit7;public class Books Book book;private int num;public Book getBook() return book;public int getNum() return num;public void setBook(Book book) this.book = book;public void setNum(int num) this.num = num;package unit7;import jav

34、a.util.HashMap;import java.util.Iterator;import java.util.Map;import java.util.Scanner;public class ShopCart private Map book3 = new HashMap(); /每个购物车一个单独的HashMap放东西int MaxOrder = 2;int order = 1;public Map getBook3() / 返回一个购物车中的HashMapreturn book3;public void addBooks() / 向购物车中的HashMap添加Books对象，数目不

35、大于MaxOrderwhile (order = MaxOrder) System.out.println(请输入书名回车结束);Scanner sc1 = new Scanner(System.in);String str = sc1.next();System.out.println(请输入该书单价回车结束);Scanner sc2 = new Scanner(System.in);double dou = sc2.nextDouble();System.out.println(请输入该书购买数目回车结束);Scanner sc3 = new Scanner(System.in);int

36、i = sc3.nextInt();Books book1 = new Books();Book book2 = new Book();book2.setName(str);book2.setSinglePrice(dou);book1.setBook(book2);book1.setNum(i);book3.put(order, book1);order+;public void getSum(HashMap bookss) /取得购物车HashMap中的信息算出总价格double sum = 0.0;Books book5 = new Books();for (Iterator itera

37、tor = bookss.keySet().iterator(); iterator.hasNext();) book5 = (Books)iterator.next();sum += (book5.getNum() * (book5.getBook().getSinglePrice();System.out.println(sum);package unit7;import java.util.HashMap;import java.util.Iterator;import java.util.Map;import java.util.Scanner;public class ShopCar

38、tDemo public static void main(String args) ShopCart shop=new ShopCart();/新建一个购物车shop.addBooks(); /购物车中加东西HashMap book4=(HashMap)shop.getBook3(); shop.getSum(book4); /购物车算总价输出结果JAVA程序设计实验报告8姓名杨仕琴学号54121022日期10.13实验题目程序初稿package unit8;import java.awt.*;import java.awt.event.*;import javax.swing.*;impo

39、rt java.io.*;public class ddd extends JFrame implements ActionListener JTextArea txtMessage;JButton btnRead, btnWrite;public ddd() super(文本读写);txtMessage = new JTextArea(15, 30);btnRead = new JButton(读取);btnWrite = new JButton(写入);this.setLayout(new FlowLayout();this.add(new JLabel(文件内容：);this.add(t

40、xtMessage);this.add(btnRead);this.add(btnWrite);btnRead.addActionListener(this);btnWrite.addActionListener(this);this.setSize(400, 400);this.setVisible(true);this.setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE);public static void main(String args) new ddd();public void actionPerformed(ActionEvent

41、e) JButton btn = (JButton)e.getSource();String fileName = D:test.txt;if(btn.getText().equals(读取)tryInputStream is = new FileInputStream(fileName);BufferedReader br = new BufferedReader(new InputStreamReader(is);String line = null;StringBuffer buffer = new StringBuffer();while(line = br.readLine() !=

42、 null)buffer.append(line + n);txtMessage.setText(buffer.toString();br.close();is.close();else if(btn.getText().equals(写入)tryString msg = txtMessage.getText();OutputStream os = new FileOutputStream(fileName);PrintStream ps = new PrintStream(os);ps.print(msg);ps.close();os.close(); 所遇问题及解决办法文件读写的类太多，查

43、API查很久调试后的程序代码package unit8;import java.awt.*;import java.awt.event.*;import javax.swing.*;import java.io.*;public class ddd extends JFrame implements ActionListener JTextArea txtMessage;JButton btnRead, btnWrite;public ddd() super(文本读写);txtMessage = new JTextArea(15, 30);btnRead = new JButton(读取);b

44、tnWrite = new JButton(写入);this.setLayout(new FlowLayout();this.add(new JLabel(文件内容：);this.add(txtMessage);this.add(btnRead);this.add(btnWrite);btnRead.addActionListener(this);btnWrite.addActionListener(this);this.setSize(400, 400);this.setVisible(true);this.setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE);public static void main(String args) new d