实验十八 总复习
实验时间 2018-12-30
1、实验目的与要求
(1) 综合掌握java基本程序结构；
(2) 综合掌握java面向对象程序设计特点；
(3) 综合掌握java GUI 程序设计结构；
(4) 综合掌握java多线程编程模型；
(5) 综合编程练习。
2、实验内容和步骤
任务1：填写课程课后调查问卷，网址：https://www.wjx.cn/jq/33108969.aspx。
任务2：综合编程练习
练习1：设计一个用户信息采集程序，要求如下：
（1） 用户信息输入界面如下图所示:
（1）用户点击提交按钮时，用户输入信息显示控制台界面；
（2）用户点击重置按钮后，清空用户已输入信息；
（3）点击窗口关闭，程序退出。
实验代码：
Main:
import java.awt.EventQueue; import javax.swing.JFrame; public class Mian { public static void main(String[] args) { EventQueue.invokeLater(() -> { demo page = new demo(); }); } }
WinCenter:
import java.awt.Dimension; import java.awt.Toolkit; import java.awt.Window; public class WinCenter { public static void center(Window win){ Toolkit tkit = Toolkit.getDefaultToolkit(); Dimension sSize = tkit.getScreenSize(); Dimension wSize = win.getSize(); if(wSize.height > sSize.height){ wSize.height = sSize.height; } if(wSize.width > sSize.width) { wSize.width = sSize.width; } win.setLocation((sSize.width - wSize.width)/ 2, (sSize.height - wSize.height)/ 2); } }
demo:
import java.awt.*; import java.awt.event.*; import javax.swing.*; import javax.swing.border.*; public class demo extends JFrame { public demo() { JPanel panel1 = new JPanel(); panel1.setPreferredSize(new Dimension(700, 45)); panel1.setLayout(new GridLayout(1, 4)); JLabel label1 = new JLabel("Name:"); JTextField j1 = new JTextField(""); JLabel label2 = new JLabel("Qualification:"); JComboBox<Object> j2 = new JComboBox<>(); j2.addItem("Graduate"); j2.addItem("Not Graduate"); panel1.add(label1); panel1.add(j1); panel1.add(label2); panel1.add(j2); JPanel panel2 = new JPanel(); panel2.setPreferredSize(new Dimension(700, 50)); panel2.setLayout(new GridLayout(1, 4)); JLabel label3 = new JLabel("Address:"); JTextArea j3 = new JTextArea(); JLabel label4 = new JLabel("Hobby:"); JPanel p = new JPanel(); p.setLayout(new GridLayout(3, 1)); p.setBorder(BorderFactory.createLineBorder(null)); JCheckBox c1 = new JCheckBox("Reading"); JCheckBox c2 = new JCheckBox("Singing"); JCheckBox c3 = new JCheckBox("Dancing"); p.add(c1); p.add(c2); p.add(c3); panel2.add(label3); panel2.add(j3); panel2.add(label4); panel2.add(p); JPanel panel3 = new JPanel(); panel3.setPreferredSize(new Dimension(700, 150)); FlowLayout flowLayout1 = new FlowLayout(FlowLayout.LEFT, 20, 40); panel3.setLayout(flowLayout1); JLabel label5 = new JLabel("Sex:"); JPanel p1 = new JPanel(); p1.setLayout(new GridLayout(2,1)); p1.setBorder(BorderFactory.createLineBorder(null)); ButtonGroup bu = new ButtonGroup(); JRadioButton jr1 = new JRadioButton("Male"); JRadioButton jr2 = new JRadioButton("Female"); bu.add(jr1); bu.add(jr2); p1.add(jr1); p1.add(jr2); panel3.add(label5); panel3.add(p1); add(panel1); add(panel2); add(panel3); JPanel panel4 = new JPanel(); panel4.setPreferredSize(new Dimension(700, 150)); JButton b1 = new JButton("Validate"); panel4.add(b1); JButton b2 = new JButton("Reset"); panel4.add(b2); add(panel4); FlowLayout flowLayout = new FlowLayout(); this.setLayout(flowLayout); this.setTitle("Students Detail"); this.setBounds(200, 200, 800, 400); this.setVisible(true); this.setDefaultCloseOperation(DISPOSE_ON_CLOSE); b1.addActionListener(new ActionListener() { public void actionPerformed(ActionEvent e) { // TODO 自动生成的方法存根 String xueli = j2.getSelectedItem().toString(); System.out.println("Name:" + j1.getText()); System.out.println("Qualification:" + xueli); String hobbystring = "Hobby:"; if (c1.isSelected()) { hobbystring += "Reading"; } if (c2.isSelected()) { hobbystring += "Singing"; } if (c3.isSelected()) { hobbystring += "Dancing"; } System.out.println("Address:" + j3.getText()); if (jr1.isSelected()) { System.out.println("Sex:Male"); } if (jr2.isSelected()) { System.out.println("Sex:Female"); } System.out.println(hobbystring); } }); b2.addActionListener(new ActionListener() { public void actionPerformed(ActionEvent e) { // TODO 自动生成的方法存根 j1.setText(null); j3.setText(null); j2.setSelectedIndex(0); c1.setSelected(false); c2.setSelected(false); c3.setSelected(false); bu.clearSelection(); } }); } public static void main(String args[]) { new demo(); } }
实验运行结果：
练习2：采用GUI界面设计以下程序：
l 编制一个程序，将身份证号.txt 中的信息读入到内存中；
l 按姓名字典序输出人员信息；
l 查询最大年龄的人员信息；
l 查询最小年龄人员信息；
l 输入你的年龄，查询身份证号.txt中年龄与你最近人的姓名、身份证号、年龄、性别和出生地；
l 查询人员中是否有你的同乡。
l 输入身份证信息，查询所提供身份证号的人员信息，要求输入一个身份证数字时，查询界面就显示满足查询条件的查询结果，且随着输入的数字的增多，查询匹配的范围逐渐缩小。
实验代码：
package 马兴德; import java.io.BufferedReader; import java.io.File; import java.io.FileInputStream; import java.io.InputStreamReader; import java.io.FileNotFoundException; import java.io.IOException; import java.util.ArrayList; import java.util.Arrays; import java.util.Collections; import java.util.Scanner; import java.awt.*; import javax.swing.*; import java.awt.event.*; public class Main extends JFrame { private static ArrayList<Student> studentlist; private static ArrayList<Student> list; private JPanel panel; private JPanel buttonPanel; private static final int DEFAULT_WITH = 800; private static final int DEFAULT_HEIGHT = 500; public Main() { studentlist = new ArrayList<>(); Scanner scanner = new Scanner(System.in); File file = new File("F:\身份证号.txt"); try { FileInputStream fis = new FileInputStream(file); BufferedReader in = new BufferedReader(new InputStreamReader(fis)); String temp = null; while ((temp = in.readLine()) != null) { Scanner linescanner = new Scanner(temp); linescanner.useDelimiter(" "); String name = linescanner.next(); String number = linescanner.next(); String sex = linescanner.next(); String age = linescanner.next(); String province =linescanner.nextLine(); Student student = new Student(); student.setName(name); student.setnumber(number); student.setsex(sex); int a = Integer.parseInt(age); student.setage(a); student.setprovince(province); studentlist.add(student); } } catch (FileNotFoundException e) { System.out.println("学生信息文件找不到"); e.printStackTrace(); } catch (IOException e) { System.out.println("学生信息文件读取错误"); e.printStackTrace(); } panel = new JPanel(); panel.setLayout(new BorderLayout()); JTextArea jt = new JTextArea(); panel.add(jt); add(panel, BorderLayout.NORTH); buttonPanel = new JPanel(); buttonPanel.setLayout(new GridLayout(1, 7)); JButton jButton = new JButton("字典排序"); JButton jButton1 = new JButton("年龄最大和年龄最小"); JLabel lab = new JLabel("猜猜你的老乡"); JTextField jt1 = new JTextField(); JLabel lab1 = new JLabel("找找同龄人（年龄相近）："); JTextField jt2 = new JTextField(); JLabel lab2 = new JLabel("输入你的身份证号码："); JTextField jt3 = new JTextField(); JButton jButton2 = new JButton("退出"); jButton.setBounds(110, 90, 60, 30); jButton1.setBounds(110, 90, 60, 30); jt1.setBounds(110, 90, 60, 30); jt2.setBounds(110, 90, 60, 30); jt3.setBounds(110, 90, 60, 30); jButton2.setBounds(110, 90, 60, 30); jButton.addActionListener(new ActionListener() { public void actionPerformed(ActionEvent e) { Collections.sort(studentlist); jt.setText(studentlist.toString()); } }); jButton1.addActionListener(new ActionListener() { public void actionPerformed(ActionEvent e) { int max = 0, min = 100; int j, k1 = 0, k2 = 0; for (int i = 1; i < studentlist.size(); i++) { j = studentlist.get(i).getage(); if (j > max) { max = j; k1 = i; } if (j < min) { min = j; k2 = i; } } jt.setText("年龄最大：" + studentlist.get(k1) + "年龄最小：" + studentlist.get(k2)); } }); jButton2.addActionListener(new ActionListener() { public void actionPerformed(ActionEvent e) { dispose(); System.exit(0); } }); jt1.addActionListener(new ActionListener() { public void actionPerformed(ActionEvent e) { String find = jt1.getText(); String text=""; String place = find.substring(0, 3); for (int i = 0; i < studentlist.size(); i++) { if (studentlist.get(i).getprovince().substring(1, 4).equals(place)) { text+=" "+studentlist.get(i); jt.setText("老乡：" + text); } } } }); jt2.addActionListener(new ActionListener() { public void actionPerformed(ActionEvent e) { String yourage = jt2.getText(); int a = Integer.parseInt(yourage); int near = agenear(a); int value = a - studentlist.get(near).getage(); jt.setText("年龄相近：" + studentlist.get(near)); } }); jt3.addActionListener(new ActionListener() { public void actionPerformed(ActionEvent e) { list = new ArrayList<>(); Collections.sort(studentlist); String key = jt3.getText(); for (int i = 1; i < studentlist.size(); i++) { if (studentlist.get(i).getnumber().contains(key)) { list.add(studentlist.get(i)); jt.setText("emmm！你可能是： " + list); } } } }); buttonPanel.add(jButton); buttonPanel.add(jButton1); buttonPanel.add(lab); buttonPanel.add(jt1); buttonPanel.add(lab1); buttonPanel.add(jt2); buttonPanel.add(lab2); buttonPanel.add(jt3); buttonPanel.add(jButton2); add(buttonPanel, BorderLayout.SOUTH); setSize(DEFAULT_WITH, DEFAULT_HEIGHT); } public static int agenear(int age) { int j=0,min=53,value=0,k=0; for (int i = 0; i < studentlist.size(); i++) { value=studentlist.get(i).getage()-age; if(value<0) value=-value; if (value<min) { min=value; k=i; } } return k; } }
package 马兴德; import java.awt.*; import javax.swing.*; import c.v; public class ButtonTest { public static void main(String[] args) { EventQueue.invokeLater(() -> { JFrame frame = new Main(); frame.setTitle("身份证"); frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); frame.setVisible(true); }); } }
package 马兴德; public class Student implements Comparable<Student> { private String name; private String number ; private String sex ; private int age; private String province; public String getName() { return name; } public void setName(String name) { this.name = name; } public String getnumber() { return number; } public void setnumber(String number) { this.number = number; } public String getsex() { return sex ; } public void setsex(String sex ) { this.sex =sex ; } public int getage() { return age; } public void setage(int age) { // int a = Integer.parseInt(age); this.age= age; } public String getprovince() { return province; } public void setprovince(String province) { this.province=province ; } public int compareTo(Student o) { return this.name.compareTo(o.getName()); } public String toString() { return name+" "+sex+" "+age+" "+number+" "+province+" "; } }
实验结果：
练习3：采用GUI界面设计以下程序
l 编写一个计算器类，可以完成加、减、乘、除的操作
l 利用计算机类，设计一个小学生100以内数的四则运算练习程序，由计算机随机产生10道加减乘除练习题，学生输入答案，由程序检查答案是否正确，每道题正确计10分，错误不计分，10道题测试结束后给出测试总分；
l 将程序中测试练习题及学生答题结果输出到文件，文件名为test.txt。
实验源代码：
package 马兴德; import java.awt.Font; import java.awt.event.ActionEvent; import java.awt.event.ActionListener; import java.io.FileNotFoundException; import java.io.PrintWriter; import java.util.Collections; import java.util.Scanner; import javax.swing.*; import java.math.*; public class n extends JFrame { private String[] c=new String[10]; private String[] c1=new String[11]; private int[] list=new int[10]; int i=0,i1=0,sum = 0; private PrintWriter out = null; private JTextArea text,text1; private int counter; public n() { JPanel Panel = new JPanel();Panel.setLayout(null); JLabel JLabel1=new JLabel("...");JLabel1.setBounds(500, 800, 400, 30);JLabel1.setFont(new Font("Courier",Font.PLAIN,35)); JButton Button = new JButton("题目");Button.setBounds(50,150,150,50);Button.setFont(new Font("Courier",Font.PLAIN,20)); Button.addActionListener(new Action()); JButton Button2 = new JButton("确定");Button2.setBounds(300,150,150,50);Button2.setFont(new Font("Courier",Font.PLAIN,20));Button2.addActionListener(new Action1()); JButton Button3 = new JButton("读出文件");Button3.setBounds(500,150,150,50);Button3.setFont(new Font("Courier",Font.PLAIN,20));Button3.addActionListener(new Action2()); text=new JTextArea(30,80);text.setBounds(30, 50, 200, 50);text.setFont(new Font("Courier",Font.PLAIN,35)); text1=new JTextArea(30,80);text1.setBounds(270, 50, 200, 50);text1.setFont(new Font("Courier",Font.PLAIN,35)); Panel.add(text); Panel.add(text1); Panel.add(Button); Panel.add(Button2); Panel.add(Button3); Panel.add(JLabel1); add(Panel); } private class Action implements ActionListener { public void actionPerformed(ActionEvent event) { text1.setText("0"); if(i<11) { int a = 1+(int)(Math.random() * 99); int b = 1+(int)(Math.random() * 99); int m= (int) Math.round(Math.random() * 3); switch(m) { case 1: while(a<b){ b = (int) Math.round(Math.random() * 100);a = (int) Math.round(Math.random() * 100); } c[i]=((i+1)+":"+a+"/"+b+"="); list[(i+1)]=Math.floorDiv(a, b); text.setText((i+1)+":"+a+"/"+b+"="); i++; break; case 2: c[i]=((i+1)+":"+a+"*"+b+"="); list[(i+1)]=Math.multiplyExact(a, b); text.setText((i+1)+":"+a+"*"+b+"="); i++; break; case 3: c[i]=((i+1)+":"+a+"+"+b+"="); list[(i+1)]=Math.addExact(a, b); text.setText((i+1)+":"+a+"+"+b+"="); i++; break ; case 4: while(a<=b){ b = (int) Math.round(Math.random() * 100);a = (int) Math.round(Math.random() * 100); } c[i]=((i+1)+":"+a+"-"+b+"="); text.setText((i+1)+":"+a+"-"+b+"="); list[(i+1)]=Math.subtractExact(a, b); i++; break ; } } } } private class Action1 implements ActionListener { public void actionPerformed(ActionEvent event) { if(i<10) { String daan=text1.getText().toString().trim(); int a = Integer.parseInt(daan); if(text1.getText()!=" ") { if(list[i1]==a) sum+=10; } c1[i1]=daan; i1++; } } } private class Action2 implements ActionListener { public void actionPerformed(ActionEvent event) { try { out = new PrintWriter("text.txt"); } catch (FileNotFoundException e) { e.printStackTrace(); } for(int counter=0;counter<10;counter++) { out.println(c[counter]+c1[counter]); } out.println("成绩"+sum); out.close(); } } }
package 马兴德; import java.awt.Dimension; import java.awt.EventQueue; import java.awt.Toolkit; import javax.swing.JFrame; public class d{ public static void main (String args[]) { Toolkit t=Toolkit.getDefaultToolkit(); Dimension s=t.getScreenSize(); EventQueue.invokeLater(() -> { JFrame frame = new n(); frame.setBounds(0, 0,(int)s.getWidth()/2,(int)s.getHeight()/2); frame.setTitle("大师"); frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); frame.setVisible(true); }); } }
任务3：本学期课程已结束，请汇总《面向对象程序设计课程学习进度条》的数据，统计个人专业能力提升的数据。并从学习内容、学习方法、学习心得几个方面进行课程学习总结，也希望你对课程的不足提出建议和意见。
总结：
刚开始拿到这本厚厚的Java书的时候有点慌张，害怕太多而且最主要的还害怕学不会，可是一开始老师就告诉我们刚开始听不懂不要着急，听一两章就会慢慢进入状态。这节课最大的一个特色是老师为了辅助我们学习为我们请了一个助教，这个助教是我们的学长也是学生，所以我们也就没什么压力，这种学习模式是我以前没接触到过的，所以我希望以后再条件允许的情况下，老师还为下一届的学弟学妹也请一个助教来辅助他们学习。
谈及这学期所学到的知识，我认为有难的知识也有简单的知识，尤其是当我学到继承、接口、lambda表达式与内部类和GUI设计界面这三部分知识内容的时候，我感觉特别难，每次的作业下来，都要请教同学好几次才能勉强把作业写出来，而在后面通过老师提的建议，我们可以通过各种资源来自助学习，尤其是看视频来学习，我认为这对我帮助真的特别大，视频中所讲到的有些知识的方法我感觉要比书本的知识通俗易懂，所以我感觉我的学习负担也会相对减轻；我最感兴趣的还是GUI设计界面，虽然学的不是很透彻，但是我依然很有兴趣，我认为我可以通过这个来设计一个我想要一个什么样的界面就设计一个什么样的界面，这就是最吸引我的地方。最后，还是要感谢老师和学长在一学期以来给我们提供的帮助，对我们的悉心教导。