1.写一个名为Rectangle的类表示矩形。其属性包括宽width、高height和颜色color,width和height都是double型的,而color则是String类型的。要求该类具有:

(1) 使用构造函数完成各属性的初始赋值

(2) 使用get…()和set…()的形式完成属性的访问及修改

(3) 提供计算面积的getArea()方法和计算周长的getLength()方法

Rectangle

 1 package cn.work.day0917.demo01;
 2
 3 public class Rectangle {
 4
 5     private double width;
 6     private double height;
 7     private String color;
 8
 9     Rectangle(double width, double height, String color) {
10         this.width = width;
11         this.height = height;
12         this.color = color;
13     }
14
15     public void setColor(String color) {
16         this.color = color;
17     }
18
19     public void setWidth(double width){
20         this.width=width;
21     }
22
23     public void setHeight(double height){
24         this.height=height;
25     }
26
27     public String getColor(){
28         return color;
29     }
30
31     public double getWidth() {
32         return width;
33     }
34
35     public double getHeight() {
36         return height;
37     }
38
39     public double getArea(){
40         return width*height;
41     }
42
43     public double getLength(){
44         return (width*height)*2;
45     }
46 }
47
48 package cn.work.day0917.demo01;
49
50 public class Demo01 {
51
52     public static void main(String[] args) {
53         Rectangle rectangle=new Rectangle(10.0,20.0,"yellow");
54         System.out.println("矩形的面积是:"+rectangle.getArea());
55         System.out.println("矩形的周长是:"+rectangle.getLength());
56     }
57 }

2.银行的账户记录Account有账户的唯一性标识(11个长度的字符和数字的组合),用户的姓名,开户日期,账户密码(六位的数字,可以用0开头),当前的余额。银行规定新开一个账户时,银行方面提供一个标识符、账户初始密码123456,客户提供姓名,开户时客户可以直接存入一笔初始账户金额,不提供时初始余额为0。定义该类,并要求该类提供如下方法:存款、取款、变更密码、可以分别查询账户的标识、姓名、开户日期、当前余额等信息。

Bank

 1 public class Bank {
 2     private String aco;
 3     private String name;
 4     private String time;
 5     private double num;
 6     private int[] password;
 7
 8     public Bank(String aco, String name, String time, double num, int[] password) {
 9         this.aco = aco;
10         this.name = name;
11         this.time = time;
12         this.num = num;
13         this.password = password;
14     }
15
16     public String getAco() {
17         return aco;
18     }
19
20     public void setAco(String aco) {
21         this.aco = aco;
22     }
23
24     public String getName() {
25         return name;
26     }
27
28     public void setName(String name) {
29         this.name = name;
30     }
31
32     public String getTime() {
33         return time;
34     }
35
36     public void setTime(String time) {
37         this.time = time;
38     }
39
40     public double getNum() {
41         return num;
42     }
43
44     public void setNum(double num) {
45         this.num = num;
46     }
47
48     public int[] getPassword() {
49         return password;
50     }
51
52     public void setPassword(int[] password) {
53         this.password = password;
54     }
55
56
57     public void Cun(double num){
58         this.num=this.num+num;
59     }
60
61     public void Qu(double num){
62         this.num=this.num-num;
63     }
64
65
66     public String kaiHuTime(){
67         //getInstance()
68         //使用默认时区和语言环境获得一个日历。
69         //getTime()
70         //返回一个表示此 Calendar 时间值(从历元至现在的毫秒偏移量)的 Date 对象。
71         Date currDate= Calendar.getInstance().getTime();
72         SimpleDate sdf=new SimpleDate("yyyy-MM-dd");
73         this.time=sdf.format(currDate);
74         return time;
75     }
76
77 }

总结:多去刷题,在做题的时候,认真去审题。

02-01 17:11