JAVA 5.17习题

1.编写并测试一个代表地址的Address类，地址信息由国家、省份、城市、街道、邮编组成，并可以返回完整的地址信息。

//=================================================
// File Name       :	Address_demo
//------------------------------------------------------------------------------
// Author          :	Common


// 内部类名：Address
// 属性：
// 方法：
class Address{
	private String country;			//定义国家 
	private String province;		//定义省份
	private String city;				//定义城市
	private String street;			//定义街道
	private String  zipcode;		//定义邮编
	
	public Address(String country,String province,String city,String street,String  zipcode){		//构造方法设置地址
		this.country = country;
		this.province = province;
		this.city = city;
		this.street = street;
		this.zipcode = zipcode;
	}
	
	public String getCountry(){
		return this.country;
	}

	public void setCountry(String country) {
		this.country = country;
	}
	
	public String getProvince() {
		return this.province;
	}

	public void setProvince(String province) {
		this.province = province;
	}

	public String getCity() {
		return this.city;
	}

	public void setCity(String city) {
		this.city = city;
	}

	public String getStreet() {
		return this.street;
	}

	public void setStreet(String street) {
		this.street = street;
	}

	public String getZipcode() {
		return this.zipcode;
	}

	public void setZipcode(String zipcode) {
		this.zipcode = zipcode;
	}

	public void print(){		//1.定义全部输出方法
		System.out.println("国家"+this.country+"
"+"省份"+this.province+"
"+"城市"+this.city+"
"+"街道"+this.street+"
"+"邮编"+this.zipcode);
	}
}




//主类
//Function        : 	Address
public class Address_demo {

	public static void main(String[] args) {
		// TODO 自动生成的方法存根
		Address add = new Address("中国","福建","涵江","中山路","351111");
		add.print();
	}

}

2.定义并测试一个代表员工的employee类。员工属性包括“编号”、“姓名”、“基本薪水”、“薪水增长额”，还包括计算薪水增长额及计算增长后的工资总额的操作方法

//=================================================
// File Name       :	Employee_demo
//------------------------------------------------------------------------------
// Author          :	Common


// 类名：Employee
// 属性：
// 方法：
class Employee{
	private String id;
	private String name;
	private int basic_Salary;
	private int growth_Salary;
	
	public Employee(String id, String name, int basic_Salary, int growth_Salary) {
		this.id = id;
		this.name = name;
		this.basic_Salary = basic_Salary;
		this.growth_Salary = growth_Salary;
	}
	
	public String getId() {
		return id;
	}
	public void setId(String id) {
		this.id = id;
	}
	public String getName() {
		return name;
	}
	public void setName(String name) {
		this.name = name;
	}
	public int getBasic_Salary() {
		return basic_Salary;
	}
	public void setBasic_Salary(int basic_Salary) {
		this.basic_Salary = basic_Salary;
	}
	public int getGrowth_Salary() {
		return growth_Salary;
	}
	public void setGrowth_Salary(int growth_Salary) {
		this.growth_Salary = growth_Salary;
	}
	
	public void print(){
		System.out.println("员工编号"+this.id+"
"+"员工姓名"+this.name+"
"+"基本工资"+this.basic_Salary+"
"+"奖金"+this.growth_Salary+"
"+"总额"+(this.basic_Salary+this.growth_Salary));
	}
	
}


//主类
//Function        : 	Employee
public class Employee_demo {

	public static void main(String[] args) {
		// TODO 自动生成的方法存根
		Employee emp = new Employee("1", "Jack", 10000, 5000);
		emp.print();
	}

}

编写程序，统计处字符串“want you to know one thing”中字母n和字母o的出现次数

//=================================================
// File Name       :	string_Count_demo
//------------------------------------------------------------------------------
// Author          :	Common


// 类名：string_Count
// 属性：
// 方法：
class string_Count{
	private int num;
	private char str[];
	private char c;
	
	public string_Count(String str,char c){
		this.str = str.toCharArray();
		this.c = c;
	}
	
	public void print(){
		for(int i=0;i<this.str.length;i++){
			if(str[i] == this.c){
				this.num++;
			}
		}
		System.out.println("有"+this.c+"的个数为："+this.num+"
");
		this.num = 0;		//对num清零
	}
	
	
}

//主类
//Function        : 	string_Count
public class string_Count_demo {

	public static void main(String[] args) {
		// TODO 自动生成的方法存根
		string_Count demo = new string_Count("want you to know one thing",'n');
		demo.print();
		string_Count demo_ = new string_Count("want you to know one thing",'o');
		demo_.print();
	}

}

设计一个表示用户的user类，类中的变量有用户名/口令和记录用户个数的变量，定义类的3个构造方法（无参、为用户名赋值、为用户名和口令赋值）、获取和设置口令的方法和返回类信息的方法

//=================================================
// File Name       :	User_demo
//------------------------------------------------------------------------------
// Author          :	Common


// 类名：user
// 属性：
// 方法：
class user{
	private String name;
	private String pwd;
	private static int user_num;	//声明成static的时候产生多个对象的时候，修改一个对象就行修改所有的对象
	
	public user() {	//构造方法无参
		user_num++;	//用静态方式访问
	}
	
	public user(String name) {	//构造方法,为用户名赋值
		this.name = name;
		user_num++;
	}

	public user(String name, String pwd) {	//构造方法,为用户名和口令赋值
		this.name = name;
		this.pwd = pwd;
		user_num++;
	}

	public String getPwd() {
		return this.pwd;
	}
	public void setPwd(String pwd) {
		this.pwd = pwd;
	}
	
	public void print(){
		System.out.println("用户名："+this.name+"
"+"密码："+this.pwd+"
"+"用户个数"+user_num);
	}
	
}


//主类
//Function        : 	user
public class User_demo {

	public static void main(String[] args) {
		// TODO 自动生成的方法存根
		user zhangsan = new user();
		zhangsan.print();
		user lisi = new user("李四");
		lisi.print();
		user wangwu = new user("王五","12345");
		wangwu.print();
		wangwu.setPwd("12345678");
		System.out.println("password:"+wangwu.getPwd());
		wangwu.print();
	}

}

字符串操作

//=================================================
// File Name       :	String_operation_demo
//------------------------------------------------------------------------------
// Author          :	Common


public class String_operation_demo {

	public static void main(String[] args) {
		// TODO 自动生成的方法存根
		String str = "Java技术学习班  20070326";
		System.out.println(str.substring(11));
		
		String str1 = "MLDN JAVA";
		String str2 = str1.replace("JAVA", "J2EE");
		System.out.println(str2);
		
		System.out.println(str.charAt(8));
		
		System.out.println(str.replace("0", ""));
		
		System.out.println(str.replace(" ", ""));
		
		String str3 = "350101199302147777";
		System.out.println("birthday:"+str3.substring(6, 14));
	}

}

编写一个公司员工类

//=================================================
// File Name       :	Cooperation_employee_demo
//------------------------------------------------------------------------------
// Author          :	Common


// 类名：Cooperation_employee
// 属性：
// 方法：
class Cooperation_employee{
	private String id;
	private String name;
	private int salary;
	private String department;
	
	public Cooperation_employee(){	//无参

	}
	
	public Cooperation_employee(String id){	//单参
		this.id = id;
		this.name = "无名氏";
		this.salary = 0;
		this.department = "未定";
	}
	
	public Cooperation_employee(String id,String name){	//双参
		this.id = id;
		this.name = name;
		this.salary = 1000;
		this.department = "后勤";
	}
	
	public Cooperation_employee(String id,String name,int salary,String department){	//4参
		this.id = id;
		this.name = name;
		this.salary = salary;
		this.department = department;
	}
	
	public void print(){
		System.out.println("员工号"+this.id+"
"+"姓名"+this.name+"
"+"薪水"+this.salary+"
"+"部门"+this.department);
	}
}


public class Cooperation_employee_demo {

	public static void main(String[] args) {
		// TODO 自动生成的方法存根
		Cooperation_employee no_1  = new Cooperation_employee();
		no_1.print();
		Cooperation_employee no_2  = new Cooperation_employee("001");
		no_2.print();
		Cooperation_employee no_3  = new Cooperation_employee("001","张三");
		no_3.print();
		Cooperation_employee no_4  = new Cooperation_employee("002","李四",1000,"开发");
		no_4.print();
	}

}

声明一个图书类、其数据成员位书名、编号（利用静态变量实现自动编号）、书价，并拥有静态数据成员册数、记录图书的总册数，在构造方法中利用此静态变量为对象的编号赋值，在主方法中定义对象数组，并求出总册数

//=================================================
// File Name       :	book_demo
//------------------------------------------------------------------------------
// Author          :	Common


// 类名：book
// 属性：
// 方法：
class book{
	private String name;
	private String id;
	private double price;
	private static int count;
	
	public book(String name,double price){
		count++;
		this.name = name;
		this.price = price;
		this.id = "000"+count;
	}
	
	public void print(){
		System.out.println("书名:"+this.name+"
"+"ID:"+this.id+"
"+"价格:"+this.price+"
"+"书的总数"+count);
	}
	
}

public class book_demo {

	public static void main(String[] args) {
		// TODO 自动生成的方法存根
		book[] book_array = new book[10];
		for(int i=0;i<book_array.length;i++){
			book_array[i] = new book("JAVA编程思想",19.8);
		}
		book_array[1].print();
	}

}