实验十八 总复习

实验时间 2018-12-30

1、实验理论知识

(1)第一个关键词:public称为访问修饰符,用于控制程序的其他部分对代码的访问级别。

第二个关键词:class表明java程序中的全部内容都包含在类中。

第三个关键词:main方法必须声明为public。

boolean(布尔)类型:用于判断逻辑条件;有两个值false和true。

return语句用于函数的终止执行或退出类的方法,并把控制权返回该方法的调用者。

break语句的三种作用:在switch语句中终止一个语句序列;使用break语句直接强行退出循环;使用break语句实现goto的功能。

(2)java面向对象程序设计:抽象;继承;封装;多态性。

继承:指子类拥有父类数据结构的方法和机制,只能是单继承。

封装性:保证程序和数据不受外部干扰且不被误用,目的在于保护信息;优点有:保护类中的信息;隐藏细节信息;提高复用率。

多态性:一个接口,多个方法;允许一个接口被多个同类使用。

对象的特点:对象具有属性和行为;对象具有变化的变化的状态;对象具有唯一性;对象都是某个类别的实例。

面向对象程序设计优点:可重用性(提高开发效率);可扩展性(便于软件修改);可管理性(将数据与功能结合)。

(3)Frame(框架):用于描述顶层窗口。

Swing(用户界面开发工具包):Swing对平台的依赖很小;swing类位于javax.swing包中;所有的swing组件都必须由事件分派线程进行配置。

JFrame:扩展于Frame类,是不绘制在swing组件上的,它的修饰部件 ( 按钮 、标题栏、图标等)由用户的窗口系统绘制。

(4)java多线程的实现方式:继承Thread类,重写run函数;实现Runnable接口,重写run函数;实现Callable接口,重写call函数。

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:

基于java诈骗骚扰电话查询系统_System

 (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。

package Project1;

import java.awt.Color;
import java.awt.Dimension;
import java.awt.FlowLayout;
import java.awt.GridLayout;
import java.awt.LayoutManager;
import java.awt.Panel;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.io.BufferedReader;
import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStreamReader;
import java.util.ArrayList;
import java.util.Timer;
import java.util.TimerTask;

import javax.swing.BorderFactory;
import javax.swing.ButtonGroup;
import javax.swing.ButtonModel;
import javax.swing.JButton;
import javax.swing.JCheckBox;
import javax.swing.JComboBox;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.JRadioButton;
import javax.swing.JTextField;

public class DemoJFrame extends JFrame {
    private JPanel jPanel1;
    private JPanel jPanel2;
    private JPanel jPanel3;
    private JPanel jPanel4;
    private JTextField fieldname;
    private JComboBox comboBox;
    private JTextField fieldadress;
    private ButtonGroup bg;
    private JRadioButton nan;
    private JRadioButton nv;
    private JCheckBox reading;
    private JCheckBox traveling;
    private JCheckBox listening;

    public DemoJFrame() {
        // 设置窗口大小
        this.setSize(600, 400);
        // 设置可见性
        this.setVisible(true);
        // 设置标题
        this.setTitle("编程练习一");
        // 设置关闭操作
        this.setDefaultCloseOperation(EXIT_ON_CLOSE);
        // 设置窗口居中
        WinCenter.center(this);
        // 创建四个面板对象
        jPanel1 = new JPanel();
        setJPanel1(jPanel1);
        jPanel2 = new JPanel();
        setJPanel2(jPanel2);
        jPanel3 = new JPanel();
        setJPanel3(jPanel3);
        jPanel4 = new JPanel();
        setJPanel4(jPanel4);
        // 设置容器的为流布局
        FlowLayout flowLayout = new FlowLayout();
        this.setLayout(flowLayout);
        // 将四个面板添加到容器中
        this.add(jPanel1);
        this.add(jPanel2);
        this.add(jPanel3);
        this.add(jPanel4);

    }

    /*
     * 设置面一
     */
    private void setJPanel1(JPanel jPanel) {
        // TODO 自动生成的方法存根
        jPanel.setPreferredSize(new Dimension(700, 45));
        // 给面板的布局设置为网格布局 一行4列
        jPanel.setLayout(new GridLayout(1, 4));
        JLabel name = new JLabel("name:");
        name.setSize(100, 50);
        fieldname = new JTextField("");
        fieldname.setSize(40, 20);
        JLabel study = new JLabel("study:");
        comboBox = new JComboBox();
        comboBox.addItem("junior");
        comboBox.addItem("senior");
        comboBox.addItem("bachelor");
        jPanel.add(name);
        jPanel.add(fieldname);
        jPanel.add(study);
        jPanel.add(comboBox);

    }

    /*
     * 设置面板二
     */
    private void setJPanel2(JPanel jPanel) {
        // TODO 自动生成的方法存根
        jPanel.setPreferredSize(new Dimension(700, 50));
        // 给面板的布局设置为网格布局 一行4列
        jPanel.setLayout(new GridLayout(1, 4));
        JLabel name = new JLabel("address:");
        fieldadress = new JTextField();
        fieldadress.setPreferredSize(new Dimension(50, 50));
        JLabel study = new JLabel("hobby:");
        JPanel selectBox = new JPanel();
        selectBox.setBorder(BorderFactory.createTitledBorder(""));
        selectBox.setLayout(new GridLayout(3, 1));
        reading = new JCheckBox("reading");
        traveling = new JCheckBox("traveling");
        listening = new JCheckBox("listening");
        selectBox.add(reading);
        selectBox.add(traveling);
        selectBox.add(listening);
        jPanel.add(name);
        jPanel.add(fieldadress);
        jPanel.add(study);
        jPanel.add(selectBox);
    }

    /*
     * 设置面板三
     */
    private void setJPanel3(JPanel jPanel) {
        // TODO 自动生成的方法存根
        jPanel.setPreferredSize(new Dimension(700, 150));
        FlowLayout flowLayout = new FlowLayout(FlowLayout.LEFT);
        jPanel.setLayout(flowLayout);
        JLabel sex = new JLabel("sex:");
        JPanel selectBox = new JPanel();
        selectBox.setBorder(BorderFactory.createTitledBorder(""));
        selectBox.setLayout(new GridLayout(2, 1));
        bg = new ButtonGroup();
        nan = new JRadioButton("male");
        nv = new JRadioButton("female");
        bg.add(nan);
        bg.add(nv);
        selectBox.add(nan);
        selectBox.add(nv);
        jPanel.add(sex);
        jPanel.add(selectBox);

    }

    /*
     * 设置面板四
     */
    private void setJPanel4(JPanel jPanel) {
        // TODO 自动生成的方法存根
        jPanel.setPreferredSize(new Dimension(700, 150));
        FlowLayout flowLayout = new FlowLayout(FlowLayout.CENTER, 50, 10);
        jPanel.setLayout(flowLayout);
        jPanel.setLayout(flowLayout);
        JButton sublite = new JButton("validate");
        JButton reset = new JButton("reset");
        sublite.addActionListener((e) -> valiData());
        reset.addActionListener((e) -> Reset());
        jPanel.add(sublite);
        jPanel.add(reset);
    }

    /*
     * 提交数据
     */
    private void valiData() {
        // TODO 自动生成的方法存根
        // 拿到数据
        String name = fieldname.getText().toString().trim();
        String xueli = comboBox.getSelectedItem().toString().trim();
        String address = fieldadress.getText().toString().trim();
        System.out.println(name);
        System.out.println(xueli);
        String hobbystring="";
        if (reading.isSelected()) {
            hobbystring+="reading   ";
        }
        if (traveling.isSelected()) {
            hobbystring+="traveling  ";
        }
        if (listening.isSelected()) {
            hobbystring+="listening  ";
        }
        System.out.println(address);
        if (nan.isSelected()) {
            System.out.println("男");
        }
        if (nv.isSelected()) {
            System.out.println("女");
        }
        System.out.println(hobbystring);
    }

    /*
     * 重置
     */
    private void Reset() {
        // TODO 自动生成的方法存根
        fieldadress.setText(null);//只删除旧文本
        fieldname.setText(null);
        comboBox.setSelectedIndex(0);
        reading.setSelected(false);//设置reading按钮状态为faulse
        traveling.setSelected(false);
        listening.setSelected(false);
        bg.clearSelection();//清除选中内容
    }
}
package Project1;



import java.awt.EventQueue;

import javax.swing.JFrame;

public class Main {
    public static void main(String[] args) {
        EventQueue.invokeLater(() -> {
            DemoJFrame page = new DemoJFrame();
        });
    }
}
package Project1;

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);
    }
}

基于java诈骗骚扰电话查询系统_自动生成_02

 

练习2:采用GUI界面设计以下程序:

 编制一个程序,将身份证号.txt 中的信息读入到内存中;

 按姓名字典序输出人员信息;

 查询最大年龄的人员信息;

 查询最小年龄人员信息;

 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;

 查询人员中是否有你的同乡。

 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。

 

package 身份查询;

    import java.awt.Dimension;
    import java.awt.EventQueue;
    import java.awt.Toolkit;

    import javax.swing.JFrame;

    public class Out {

         public static void main (String args[])
            {
                 Toolkit t=Toolkit.getDefaultToolkit();
                Dimension s=t.getScreenSize(); 
                EventQueue.invokeLater(() -> {
                    JFrame frame = new Main1();
                    frame.setBounds(0, 0,(int)s.getWidth(),(int)s.getHeight());
                    frame.setTitle("身份查询系统");
                    frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
                    frame.setVisible(true);
                 });        
            }
     
    }
package 身份查询;


    public class Person implements Comparable<Person> {
        private String name;
        private String ID;
        private int age;
        private String sex;
        private String birthplace;

        public String getname() {
        return name;
        }
        public void setname(String name) {
        this.name = name;
        }
        public String getID() {
        return ID;
        }
        public void setID(String ID) {
        this.ID= ID;
        }
        public int getage() {

        return age;
        }
        public void setage(int age) {
        this.age= age;
        }
        public String getsex() {
        return sex;
        }
        public void setsex(String sex) {
        this.sex= sex;
        }
        public String getbirthplace() {
        return birthplace;
        }
        public void setbirthplace(String birthplace) {
        this.birthplace= birthplace;
        }

        public int compareTo(Person o) {
           return this.name.compareTo(o.getname());

        }

        public String toString() {
            return  name+"\t"+sex+"\t"+age+"\t"+ID+"\t"+birthplace+"\n";

        }



        }

 

package 身份查询;

    import java.awt.BorderLayout;
    import java.awt.event.ActionEvent;
    import java.awt.event.ActionListener;
    import java.io.BufferedReader;
    import java.io.File;
    import java.io.FileInputStream;
    import java.io.FileNotFoundException;
    import java.io.IOException;
    import java.io.InputStreamReader;
    import java.util.*;
    import java.util.Timer;
    import javax.swing.*;

    public class Main1 extends JFrame
    {
        private static ArrayList<Person> Personlist;
        
        
        Scanner scanner = new Scanner(System.in);
        File file = new File("F:\\身份证号.txt");
        
        private JPanel Panel;
        private JLabel JLabel1;
        private JButton Button,Button2,Button3;
        private JTextArea text,text1,text2,text3;
        boolean tru=true;
        
        
        
        public  Main1() {

            
            Panel = new JPanel();Panel.setLayout(null);
            Button = new JButton("1:按姓名字典序输出人员信息");
            Button2 = new JButton("2:查询最大年龄与最小年龄人员信息");
            Button3 = new JButton("查询相近年龄");
            JLabel1 = new JLabel("输入身份证号或者地址查询");JLabel1.setBounds(900, 50, 400, 30);
            
            text=new JTextArea(30,80);text.setBounds(50, 180, 700, 700);
            text1=new JTextArea(1,30);text1.setBounds(900, 80, 400, 30);
            text2=new JTextArea(30,80);text2.setBounds(900,180,700, 700);
            text3=new JTextArea(30,80);text3.setBounds(420,100,200,40);
           
            Button.addActionListener(new Action());Button.setBounds(50,50,300,40);
            Button2.addActionListener(new Action1());Button2.setBounds(50,100,300,40);
            Button3.addActionListener(new Action2());Button3.setBounds(650,100,120,40);
            Panel.add(JLabel1);
            Panel.add(Button);
            Panel.add(Button2);
            Panel.add(Button3);
            Panel.add(text);
            Panel.add(text2);
            Panel.add(text1);
            Panel.add(text3);
            add(Panel);
            
            
            Timer timer = new Timer();      
            TimerTask timeTask=new TimerTask() {
                
                 @Override
                public void run()
                 {             
                         // TODO Auto-generated method stub
                         text2.setText(null);
                         String place=text1.getText().toString().trim();
                         for (int i = 0; i <Personlist.size(); i++) 
                         {
                             
                             String Str=(String)Personlist.get(i).getbirthplace();
                             if(Str.contains(place)&&!place.equals("")) 
                                 {
                                 text2.append(Personlist.get(i).toString());
                                 }  
                        }      
                         for (int i = 0; i <Personlist.size(); i++) 
                         {
                             
                             String Str=(String)Personlist.get(i).getID();
                             if(Str.contains(place)&&!place.equals("")) 
                                 {
                                 text2.append(Personlist.get(i).toString());
                                 }  
                        }    
                         
                }
                
            };timer.schedule(timeTask, 0,100);
         
            Personlist = new ArrayList<>();       
            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 ID = linescanner.next();
                    String sex = linescanner.next();
                    String age = linescanner.next();
                    String place =linescanner.nextLine();
                    Person Person = new Person();
                    Person.setname(name);
                    Person.setID(ID);
                    Person.setsex(sex);
                    int a = Integer.parseInt(age);
                    Person.setage(a);
                    Person.setbirthplace(place);
                    Personlist.add(Person);

                }
            } catch (FileNotFoundException e) {
                System.out.println("查找不到信息");
                e.printStackTrace();
            } catch (IOException e) {
                System.out.println("信息读取有误");
                e.printStackTrace();
            }
     
            
        }
        
        


        private class Action implements ActionListener
        {
        public void actionPerformed(ActionEvent event)
            {        
             text.setText(null);
             Collections.sort(Personlist);
             text.append(Personlist.toString());
            }

        }         

        private class Action1 implements ActionListener
            {
            public void actionPerformed(ActionEvent event)
                {        
                text.setText(null);
                int max=0,min=100;int j,k1 = 0,k2=0;
                for(int i=1;i<Personlist.size();i++)
                {
                    j=Personlist.get(i).getage();
                   if(j>max)
                   {
                       max=j; 
                       k1=i;
                   }
                   if(j<min)
                   {
                       min=j; 
                       k2=i;
                   }
                }  
                text.append("年龄最大:   "+Personlist.get(k1)+"\n"+"年龄最小:  "+Personlist.get(k2));     
                }
       
            }          

        private class Action2 implements ActionListener
        {
        public void actionPerformed(ActionEvent event)
            {        
             text.setText(null);
             int a = Integer.parseInt(text3.getText().toString().trim());         
             int d_value=a-Personlist.get(agenear(a)).getage();
             
             for (int i = 0; i < Personlist.size(); i++)
             {
                 int p=Personlist.get(i).getage()-a;
                
                 if(p==d_value||-p==d_value) text.append(Personlist.get(i).toString());
             } 
            }

        } 
        
        
        public static int agenear(int age) {
            
            int j=0,min=53,d_value=0,k=0;
             for (int i = 0; i < Personlist.size(); i++)
             {
                 d_value=Personlist.get(i).getage()-age;
                 if(d_value<0) d_value=-d_value; 
                 if (d_value<min) 
                 {
                    min=d_value;
                    k=i;
                 }

              }    return k;
             
          }

    }

基于java诈骗骚扰电话查询系统_java_03

练习3:采用GUI界面设计以下程序

 编写一个计算器类,可以完成加、减、乘、除的操作

 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;

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。

import java.awt.Dimension;
import java.awt.EventQueue;
import java.awt.Toolkit;

import javax.swing.JFrame;

public class Test {

     public static void main (String args[])
        {
             Toolkit t=Toolkit.getDefaultToolkit();
            Dimension s=t.getScreenSize(); 
            EventQueue.invokeLater(() -> {
                JFrame frame = new Demo();
                frame.setBounds(0, 0,(int)s.getWidth()/2,(int)s.getHeight()/2);
                frame.setTitle("计算");
                frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
                frame.setVisible(true);
             });        
        }
 
}
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 jisuan extends JFrame {
    
    private String[] c=new String[10];
    private String[] c1=new String[10];
    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 Demo()  {
        JPanel Panel = new JPanel();//创建具有双缓冲和流布局的新 JPanel。 
        Panel.setLayout(null);
        JLabel JLabel1=new JLabel("");//创建具有制定文本的标签1
        JLabel1.setBounds(500, 800, 400, 30);//给定标签1的大小(x,y,height,width)
        JLabel1.setFont(new Font("Courier",Font.PLAIN,35));//根据指定名称、样式和磅值大小,创建一个 Font。 
        JButton Button = new JButton("生成题目");//创建“生成题目”按钮
        Button.setBounds(50,150,150,50);Button.setFont(new Font("Courier",Font.PLAIN,20)); //规定按钮大小和按钮中字体风格等
        Button.addActionListener(new Action());//动作监听器,在有新动作时产生回应
        JButton Button2 = new JButton("确定答案");//创建“确定答案”按钮
        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");//创建“读出文件”按钮
        Button3.setBounds(500,150,150,50);Button3.setFont(new Font("Courier",Font.PLAIN,20));
        Button3.addActionListener(new Action2());
         text=new JTextArea(30,80);//构造30行,80列的new TextArea
         text.setBounds(30, 50, 200, 50);//组件位置
         text.setFont(new Font("Courier",Font.PLAIN,35));//文本域中字体名称样式磅值大小
         text1=new JTextArea(30,80);
         text1.setBounds(270, 50, 200, 50);
         text1.setFont(new Font("Courier",Font.PLAIN,35));
        
         //两个空的文本域
         Panel.add(text);
         Panel.add(text1);
         
         //将三个按钮和一个标签添加到面板
         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<10) {
        
        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 0:
          while(a<b){  b = (int) Math.round(Math.random() * 100);a = (int) Math.round(Math.random() * 100); }  
          c[i]=(i+":"+a+"/"+b+"=");
            list[i]=Math.floorDiv(a, b);
            text.setText(i+":"+a+"/"+b+"=");
            i++;
            
          break; 
      case 1:
          c[i]=(i+":"+a+"*"+b+"=");
          list[i]=Math.multiplyExact(a, b);
          text.setText(i+":"+a+"*"+b+"=");        
         i++;
          break;
      case 2:
          c[i]=(i+":"+a+"+"+b+"=");
          list[i]=Math.addExact(a, b);
         text.setText(i+":"+a+"+"+b+"=");
         i++;
          break ;
      case 3:
          while(a<=b){  b = (int) Math.round(Math.random() * 100);a = (int) Math.round(Math.random() * 100); }    
          c[i]=(i+":"+a+"-"+b+"=");
          text.setText(i+":"+a+"-"+b+"=");
          list[i]=Math.subtractExact(a, b);i++;

          break ;
          }
        }
      }
    }      
    private class Action1 implements ActionListener
    {
    public void actionPerformed(ActionEvent event)
        {    
        if(i<10) {
        text.setText(null);        
        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) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
        for(int counter=0;counter<10;counter++)
        {
            out.println(c[counter]+c1[counter]);
        }
        out.println("成绩"+sum);
        out.close();

        }

    }   
}

 

基于java诈骗骚扰电话查询系统_System_04

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。

实验总结:这学期学习java的基本概念,程序设计的特点

通过本学期的java课程学习,从刚开始到现在慢慢的学习、了解、熟悉java,在这个学习过程当中幸好有老师和助教的耐心讲解,在我们不懂得时候老师与助教相互配合,不仅在课堂上详细讲解,还在课下我们不懂的地方助教会每周固定时间答疑,在平时如果有问题老师和助教会热心解答回复我们的疑惑之处。