面向对象程序设计 课程实验 五
This commit is contained in:
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5236-499-4365-97-6843-2313-5993-7998-1455-9132-4886-8419-9757-997-5574
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7153-767-7764-9819-6754-3453-9423-86-5411-7717-9489-5214-5481-6695-8273
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@ -9,6 +9,7 @@ package javaAssignment_20240520;
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import java.io.*;
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public class function_01 {
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// 私有成员: 文件名
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private String fileName;
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// 构造函数, 接收需要创建的文件名
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@ -26,9 +27,9 @@ public class function_01 {
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* */
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public boolean createFile(){
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try {
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// 实例化 file 对象创建文件
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// 通过 File 实例化一个 file 对象用于创建文件
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File file = new File(fileName);
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// 判断文件是否创建成功
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// 判断是否已经存在同名文件
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if (file.createNewFile()){
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System.out.println("File : " + this.fileName + " Create Done!");
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return true;
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@ -17,9 +17,9 @@ public class function_02 {
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private int[] randomArray = new int[MaxLength];
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// 构造函数, 接收需要创建的文件名
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public function_02(String name ){
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this.fileName = name;
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}
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// public function_02(String name ){
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// this.fileName = name;
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// }
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/*
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* Function: createRandom
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@ -32,7 +32,7 @@ public class function_02 {
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* Return: int[] 整型数组
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* */
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public int[] createRandom(int min, int max){
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// 通过 SecureRandom 实例化一个 secureRandom 对象用于生成随机数
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// 通过 SecureRandom (安全随机类) 实例化一个 secureRandom 对象用于生成随机数
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SecureRandom secureRandom = new SecureRandom();
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for (int i = 0; i < MaxLength; i++){
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// 先生成 0 ~ max - min + 1 之间的随机数
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@ -50,16 +50,19 @@ public class function_02 {
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* Description:
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* 创建文件
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*
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* Input: void
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* Return: boolean 文件是否创建成功
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* Input: String name 需要创建的文件名
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* Return: boolean 文件是否创建成功
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* */
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public boolean createFile(){
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public boolean createFile(String name){
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try {
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this.fileName = name;
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// 通过 File 实例化 file 对象用于创建文件
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File file = new File(fileName);
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// 判断文件是否创建成功
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// .createNewFile 方法会检查文件是否存在, 如果不存在就创建文件并返回 true
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// 否则返回 false 即文件已存在
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if (file.createNewFile()){
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System.out.println("File : " + this.fileName + " Create Done!");
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System.out.println("File: " + this.fileName + " Create Done!");
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return true;
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} else {
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System.out.println("The file already exists!");
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@ -84,9 +87,9 @@ public class function_02 {
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try {
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// 通过 BufferedWriter 实例化 writer 对象用于向文件写入
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BufferedWriter writer = new BufferedWriter(new FileWriter(this.fileName));
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// write 方法写入数据
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// .write 方法写入数据
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writer.write(data);
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// close 方法写入完毕关闭文件
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// .close 方法写入完毕关闭文件
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writer.close();
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System.out.println("Write File Done!");
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return true;
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@ -107,7 +110,7 @@ public class function_02 {
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* */
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public int[] readFileToArray(){
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try{
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// 通过 BufferedReader 实例化 reader 对象用于读取文件内容
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// 通过 BufferedReader 类实例化 reader 对象用于读取文件内容
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BufferedReader reader = new BufferedReader(new FileReader(this.fileName));
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// 读取文件中一行的内容
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String line = reader.readLine();
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@ -115,7 +118,7 @@ public class function_02 {
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String[] strArray = line.split("-");
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// 创建整型数组
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int[] intArray = new int[MaxLength];
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for (int i = 0; i < 15; i++){
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for (int i = 0; i < MaxLength; i++){
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// 将字符串数组转换为整型赋值给整型数组
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intArray[i] = Integer.parseInt(strArray[i]);
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}
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@ -139,6 +142,7 @@ public class function_02 {
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* Return: int[] 需要排序的数组
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* */
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public void bubbleSort(int[] array){
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// 获取输入的数组长度
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int n = array.length;
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// 冒泡排序
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@ -42,20 +42,22 @@ public class test {
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* class: function_02.java
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*
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// 实例化第二个实验内容的对象
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function_02 f_2 = new function_02("file2.txt");
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// 实例化第二个实验内容的对象 f_2
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function_02 f_2 = new function_02();
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// 创建文件
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f_2.createFile();
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f_2.createFile("file2.txt");
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// 接收 createRandom 返回的随机数数组
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int[] array = f_2.createRandom(20, 9999);
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// 实例化 data 对象用转换
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// 使用 StringBuilder 类实例化一个 data 对象用于将
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// 整型数组转换为 字符串 + 分隔符的形式
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StringBuilder data = new StringBuilder();
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// 将获取到的数组转换为字符串
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for (int i = 0; i < array.length; i++){
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// .append 方法将输入的字符追加到字符串末尾
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data.append(array[i]);
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// 插入分隔符
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if (i != array.length - 1){
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@ -63,7 +65,7 @@ public class test {
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}
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}
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// 将字符串数组写入文件中
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// .toString 方法返回 data 中的字符串并将字符串数组写入文件中
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f_2.writeToFile(data.toString());
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// 读取文件中内容并返回成数组
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/*
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* Function: Java 课程实验 五 - 第二题 类 二
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* Date: 2024 05 28
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* Code by: JRNitre
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* */
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package javaAssignment_20240528;
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import java.io.PrintStream;
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public class Bank {
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// 银行名
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private String bankName;
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// 银行余额
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private static int money = 0;
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// 构造函数
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public Bank (String bankName){
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this.bankName = bankName;
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}
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// 获取银行当前余额
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public int getBankBalance (){
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return money;
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}
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// 向银行存钱
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// static 可以实现在没有实例化对象时就调用这个方法
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public static synchronized void Funds (int funds){
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money += funds;
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}
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}
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/*
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* Function: Java 课程实验 五 - 第二题 类 一
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* Date: 2024 05 28
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* Code by: JRNitre
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* */
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package javaAssignment_20240528;
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public class Customer implements Runnable{
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// 用户姓名
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private String customerName;
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// 存取次数
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private int customerNum;
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// 构造函数
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public Customer (String customerName){
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this.customerName = customerName;
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}
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// 重写 run 方法
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@Override
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public void run (){
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// 重复指定次数
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for (int i = 0; i < this.customerNum; i++){
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// 输出用户存款信息
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System.out.println("User: " + this.customerName + " Deposit 100");
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// 调用存款方法
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deposit(100);
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}
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}
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// 存款方法
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private synchronized void deposit (int amount){
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Bank.Funds(amount);
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}
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// 设置存款次数
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public void setDepositNum(int num){
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this.customerNum = num;
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}
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}
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/*
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* Function: Java 课程实验 五 - 第一题 类
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* Date: 2024 05 28
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* Code by: JRNitre
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* */
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package javaAssignment_20240528;
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public class FlightSystem implements Runnable{
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// 售票窗口名
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private String windowName;
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// 剩余票数
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private int tickets = 20;
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// 构造函数
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public FlightSystem(String windowName){
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this.windowName = windowName;
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}
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// 重写 run 方法
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@Override
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public void run (){
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while (tickets > 0){
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Tickets();
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}
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}
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// 售票方法
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private synchronized void Tickets (){
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if (this.tickets > 0){
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--this.tickets;
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System.out.println("Window: " + this.windowName + " Tickets were sold successfully Now remainder" + this.tickets);
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}
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}
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}
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/*
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* Function: Java 课程实验 五
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* Date: 2024 05 28
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* Code by: JRNitre
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* */
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package javaAssignment_20240528;
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public class test {
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public static void main (String[] args){
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/*
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* 用 Runnable 接口程序来模拟航班售票系统
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* 1. 实现3个售票窗口发售某次航班的20张机票
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* 2. 一个售票窗口用一个线程来表示。
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*
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* Class: FlightSystem
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*
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FlightSystem window_1 = new FlightSystem("Window_alpha");
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FlightSystem window_2 = new FlightSystem("Window_bravo");
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FlightSystem window_3 = new FlightSystem("Window_charlie");
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Thread t_1 = new Thread(window_1);
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Thread t_2 = new Thread(window_2);
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Thread t_3 = new Thread(window_3);
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t_1.start();
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t_2.start();
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t_3.start();
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*/
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/* ( つ•̀ω•́)つ :-D */
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/*
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* 1. 设某家银行可接受用户的存款,每进行一次存款,便可计算机出存款的总额。
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* 2. 现有两名顾客,每人分3次、每次存入100元。
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*
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* Class
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* 1. Bank.java
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* 2. Customer.java
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*
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// 通过 Bank 类实例化 b_1 对象
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Bank b_1 = new Bank("Best Nigger Bank");
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// 通过 Customer 实例化两个用户对象
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Customer c_1 = new Customer("Todd");
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Customer c_2 = new Customer("KoDick");
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// 调用其中的方法设置每个人的存款次数
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c_1.setDepositNum(3);
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c_2.setDepositNum(3);
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// 通过 Thread 实例化两个线程类
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Thread t_1 = new Thread(c_1);
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Thread t_2 = new Thread(c_2);
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// 在开始存款前输出一次银行当前的余额
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System.out.println("Now Bank Balance: " + b_1.getBankBalance());
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// 开始执行两个线程
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t_1.start();
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t_2.start();
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// 等待两个线程执行完毕
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try {
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t_1.join();
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t_2.join();
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} catch (InterruptedException e){
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e.printStackTrace();
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}
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// 输出当前银行余额
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System.out.println("Now Bank Balance: " + b_1.getBankBalance());
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*/
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}
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}
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package javaImplementsTemplate_20240514;
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package javaPackage_20240514;
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public class Bus implements Charge{
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@Override
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package javaImplementsTemplate_20240514;
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package javaPackage_20240514;
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public interface Charge {
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public void charge();
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package javaImplementsTemplate_20240514;
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package javaPackage_20240514;
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public class Cinema implements Charge, Play{
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package javaImplementsTemplate_20240514;
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package javaPackage_20240514;
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public interface Play {
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public void play();
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package javaImplementsTemplate_20240514;
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package javaPackage_20240514;
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public class Taxi implements Play{
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* Code by: JRNitre
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* */
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package javaImplementsTemplate_20240514;
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package javaPackage_20240514;
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public class test {
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package javaPackage_20240524;
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import java.security.SecureRandom;
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public class function {
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private int ArrayMaxLength;
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public int[] createRandomArray(int num, int min, int max){
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this.ArrayMaxLength = num;
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int[] array = new int[this.ArrayMaxLength];
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SecureRandom secureRandom = new SecureRandom();
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for (int i = 0; i < this.ArrayMaxLength; i++){
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array[i] = min + secureRandom.nextInt(max - min + 1);
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}
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return array;
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}
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}
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package javaPackage_20240524;
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public class test {
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public static void main (String[] args){
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/*
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* 1. 产生 15 个 20~9999 之间的随机整数
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* 2. 利用 BufferedWriter 类将其写入文件 file2.txt 中
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* 3. 读取该文件中的数据并升序排序
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*/
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function f_1 = new function();
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f_1.createRandomArray(15, 20, 9999);
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}
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}
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