From c5c6e02285875c63b3f25c4ebd9f3973daf9fb90 Mon Sep 17 00:00:00 2001 From: sherry <215930459@qq.com> Date: Thu, 5 Nov 2020 22:41:19 +0800 Subject: [PATCH] =?UTF-8?q?=E7=AC=AC=E4=B8=89=E6=AC=A1=E4=BD=9C=E4=B8=9A?= =?UTF-8?q?=EF=BC=8C=E5=90=8C=E6=97=B6=E6=9B=B4=E6=96=B0=E4=BA=86=E7=AC=AC?= =?UTF-8?q?=E4=B8=80=E6=AC=A1=E4=BD=9C=E4=B8=9A?= MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit --- five.java => 1029/five.java | 0 four.java => 1029/four.java | 0 one.java => 1029/one.java | 0 three.java => 1029/three.java | 0 two.java => 1029/two.java | 0 1105/Account.java | 78 +++++++++++++++++++++++++++++++++++ 1105/Course.java | 66 +++++++++++++++++++++++++++++ 1105/arrayList.java | 46 +++++++++++++++++++++ 1105/getnewDate.java | 28 +++++++++++++ 1105/main.java | 4 ++ 6.4.java | 23 ----------- scratch.java | 43 ------------------- 12 files changed, 222 insertions(+), 66 deletions(-) rename five.java => 1029/five.java (100%) rename four.java => 1029/four.java (100%) rename one.java => 1029/one.java (100%) rename three.java => 1029/three.java (100%) rename two.java => 1029/two.java (100%) create mode 100644 1105/Account.java create mode 100644 1105/Course.java create mode 100644 1105/arrayList.java create mode 100644 1105/getnewDate.java create mode 100644 1105/main.java delete mode 100644 6.4.java delete mode 100644 scratch.java diff --git a/five.java b/1029/five.java similarity index 100% rename from five.java rename to 1029/five.java diff --git a/four.java b/1029/four.java similarity index 100% rename from four.java rename to 1029/four.java diff --git a/one.java b/1029/one.java similarity index 100% rename from one.java rename to 1029/one.java diff --git a/three.java b/1029/three.java similarity index 100% rename from three.java rename to 1029/three.java diff --git a/two.java b/1029/two.java similarity index 100% rename from two.java rename to 1029/two.java diff --git a/1105/Account.java b/1105/Account.java new file mode 100644 index 0000000..f1df7f8 --- /dev/null +++ b/1105/Account.java @@ -0,0 +1,78 @@ +/*9.7 (账 户类 Account)设计一个名为 Account 的类，它包括： — 个名为 id的 int 类型私有数据域（默认值为 0)。 — 个名为 balance 的 double 类型 +私有数据域（默认值为 0>。 — 个 名 为 annuallnterestRate 的 double 类型私有数据域存储当前利率（默认值为 0)。假 + 设所有的篆户都有相同的利率。 — 个 名 为 的 Date 类型的私有数据域，存储账户的开户日期。 — 个用于创建默认账户的无参构造方法。一个用于创建带特定 + id 和初始余额的账户的构造方法。 + id、balance 和 annuallnterstRate 的访问器和修改器。 + dateCreated 的访问器。 + 一个名为 getMonthlyInterestRate()的方法，返回月利率。 — 个名为 withDraw 的方法，从账户提取特定数额。 — 个名为 deposit 的方法向账户存储特定数额。*/ + package 第三次java作业; + +import java.util.Date; +import java.util.Scanner; + +public class Account { + private int id = 0; + private double balance = 0; + private double annuallnterestRate = 0; + private Date date = new Date(); + + public int createAccount() { + System.out.println("您的账户名为" + id); + System.out.println("您的账户余额为" + balance); + return id; + } + + public void createyourAccount() { + System.out.println("请输入账户名称"); + Scanner input1 = new Scanner(System.in); + String idYours = input1.nextLine(); + System.out.println("您的账户余额为" + balance); + Scanner input2 = new Scanner(System.in); + String balanceYours = input2.nextLine(); + } + + public int getId() { + return id; + } + + public void setId() { + this.id = id; + } + + public double getBalance() { + return balance; + } + + public void setBalance() { + this.balance = balance; + } + + public double getAnnuallnterestRate() { + return annuallnterestRate; + } + + public void setAnnuallnterestRate() { + this.annuallnterestRate = annuallnterestRate; + } + + public double getMonthlyInterestRate() { + double MonthlyInterestRate = annuallnterestRate / 12; + return MonthlyInterestRate; + } + + public double withdraw() { + System.out.println("请输入您想提取的金额数量"); + Scanner input3 = new Scanner(System.in); + double withdraw = input3.nextDouble(); + balance = balance - withdraw; + return balance; + } + + public double deposit() { + System.out.println("请输入您想提取的金额数量"); + Scanner input3 = new Scanner(System.in); + double deposit = input3.nextDouble(); + balance = balance + deposit; + return balance; + } +} diff --git a/1105/Course.java b/1105/Course.java new file mode 100644 index 0000000..49843c4 --- /dev/null +++ b/1105/Course.java @@ -0,0 +1,66 @@ +/*13.13 (使得 Course 类可复制）重写程序淸单丨0-6中的 Course 类，增加一个 clone 方法，执行 +students 域上的深度复制。*/ + +package 第三次java作业; + +//在10-6的基础上，使用Cloneable接口 +public class Course implements Cloneable {//以下的数据域和方法来自10-6的要求 + private String courseName; + private String[] students = new String[100]; + private int numberOfStudents; + + public Course(String courseName) { + this.courseName = courseName; + } + + //从这门课添加一个学生 + public void addStudent(String student) { + students[numberOfStudents] = student; + numberOfStudents++;//学生总数增加 + } + + //返回这门课的学生 + public String[] getStudents() { + return students; + } + + //返回这门课的学生人数 + public int getNumberOfStudents() { + return numberOfStudents; + } + + //返回课程名 + public String getCourseName() { + return courseName; + } + + //从这门课程中删除一个学生 + public void dropStudent(String student) {//根据名字，遍历找出要drop的学生 + if (student == null) { + System.out.println("请输入删除的学生姓名"); + } + ; + for (int i = 0; i < numberOfStudents; i++) { + if (students[i] == student) {//如果找到 + for (int j = i + 1; j < numberOfStudents; i++, j++) {//将该学生后面的 + students[i] = students[j]; + } + } + numberOfStudents--;//学生总数减少一个 + } + } + + @Override + public Object clone() throws CloneNotSupportedException { + try { + Course course1 = (Course) super.clone(); + course1.students = new String[100]; + System.arraycopy(students, 0, course1.students, 0, 100); + course1.courseName = courseName; + course1.numberOfStudents = numberOfStudents; + return course1; + } catch (CloneNotSupportedException ex) { + return null; + } + } +} diff --git a/1105/arrayList.java b/1105/arrayList.java new file mode 100644 index 0000000..438f61c --- /dev/null +++ b/1105/arrayList.java @@ -0,0 +1,46 @@ +/*13.3 (排 序 ArrayList ) 编写以下方法，对 ArrayList 里面保存的数字进行排序。 +public static void sort(ArrayList list)*/ + +package 第三次java作业; +import java.util.ArrayList; +import java.util.Arrays; + +public class arrayList { + public static void main(String[] args) { + Integer[] number = {1, 2, 5, 9, 20, 15, 17}; + ArrayList list = new ArrayList<>(Arrays.asList(number));//创建arrayList + + System.out.println("最初的ArrayList：" + list); + sort(list); + System.out.println("升序排列的ArrayList：" + list);//打印原来的和排序后的动态数组 + + //测试 + list.add(100); + list.add(18);//list加入两个新的整数 + System.out.println("加入新元素的ArrayList：" + list);//打印新的list + sort(list); + System.out.println("升序排列的ArrayList：" + list);//对list进行排序 + } + + public static void sort(ArrayList list) { + Number temp = list.get(0); + + if (list.isEmpty() || list.size() == 0) {//ArrayList为空，程序结束 + System.out.println("Arraylist为空"); + return; + } + + if(list.size()==1) System.out.println(list);//Arraylist只有一个元素，不用排序 + + + for (int i = 0; i < list.size(); i++) {//进行冒泡排序 + for (int j = 0; j < list.size()-i-1; j++) { + if (list.get(j).doubleValue() > list.get(j + 1).doubleValue()) {//如果下标j的值>j+1的，两者交换，否则不变 + temp = list.get(j); + list.set(j, list.get(j + 1)); + var set = list.set(j + 1, temp); + } + } + } + } +} \ No newline at end of file diff --git a/1105/getnewDate.java b/1105/getnewDate.java new file mode 100644 index 0000000..6a2925e --- /dev/null +++ b/1105/getnewDate.java @@ -0,0 +1,28 @@ +/*9.3 (使用曰期类 Date) 编写程序创建一个 Date 对象，设置它的流逝时间分别为 10000、100000、 +1000000、10000000、100000000、1000000000、10000000000、100000000000, 然后使用 +toStringO 方法分别显示上述日期。*/ +import java.util.Date; + +public class getnewDate { + //用于显示日期 + public static void printDate(long l, Date date) { + System.out.println("流逝时间为"+l + ": " +","+"，"+"则日期为"); + System.out.println(date.toString()); + } + public static void main(String[] args) { + long l = 10000;//用于记录最新的流逝时间 + + Date date = new Date(l);//新建一个data + printDate(l, date);//调用printData函数输出时间流流逝的日期 + l *= 10;//流逝时间变为10000 + + //通过for循环让l不断增加，循环输出新的时间 + for(int i = 0; i < 7; i++) { + date.setTime(l);//setTime重新设定流失时间 + printDate(l, date); + l *= 10; + } + } + +} + diff --git a/1105/main.java b/1105/main.java new file mode 100644 index 0000000..5ead2ad --- /dev/null +++ b/1105/main.java @@ -0,0 +1,4 @@ +package 第三次java作业; + +public class main { +} diff --git a/6.4.java b/6.4.java deleted file mode 100644 index f7332a7..0000000 --- a/6.4.java +++ /dev/null @@ -1,23 +0,0 @@ -import java.util.Scanner; - -class Scratch { - public static void main(String[] args) { - System.out.println("请输入一个整数"); - Scanner input = new Scanner(System.in); - int number = input.nextInt(); - System.out.println(number + "反向数为" + reverse(number)); - - } - - public static int reverse(int number) { - int temp = 0; - int a = 0; - while (number != 0) { - a = number % 10; - number = number / 10; - temp = temp * 10 + a; - - } - return temp; - } -} \ No newline at end of file diff --git a/scratch.java b/scratch.java deleted file mode 100644 index ca51309..0000000 --- a/scratch.java +++ /dev/null @@ -1,43 +0,0 @@ -class Scratch { - public static void main(String[] args) { - import java.util.Scanner; -/** - * @author 冰樱梦 - * 时间：2018年12月 - * 题目：求矩阵主对角线元素的和 - * - */ - public class Exercise08_02 { - public static void main(String[] args){ - Scanner input=new Scanner(System.in); - System.out.println("Enter the arrays row: "); - int row=input.nextInt(); - System.out.println("Enter the arrays column: "); - int col=input.nextInt(); - double[][] list=new double[row][col]; - for(int i=0;i