第一题：
class Address{
private String country;
private String province;
private String city;
private String street;
private int postcode;
public Address(String country,String province,String city,
String street,int postcode){
this.country = country;
this.province = province;
this.city = city;
this.street = street;
this.postcode = postcode;
}
public void print(){
System.out.println("地址： " + this.country +
this.province + this.city + this.street + "\n邮编" +
this.postcode);
}
}
public class Task16{
public static void main(String args[]){
Address ad = new Address("中国","福建省","建瓯市",
"中山街",353100);
ad.print();
}
}第二题：
class Employee{
private String number;
private String name;
private int wage;
private int growWage;
private int time;
public void setNumber(String number){
this.number = number;
}
public void setName(String name){
this.name = name;
}
public void setWage(int wage){
this.wage = wage;
}
public void setGrowWage(int growWage){
this.growWage = growWage;
}
public void setTime (int time){
this.time = time;
}
public String getNumber(){
return number;
}
public String getName(){
return name;
}
public int getWage(){
return wage;
}
public int getGrowWage(){
return growWage;
}
public int getTime(){
return time;
}
public int grow(){
return this.getTime()*this.getGrowWage();
}
public int sum(){
return this.wage + this.grow();
}
public void print(){
System.out.println("姓名： " + this.getName() +
"\n编号： " + this.getNumber() + "\n基本薪水： " +
this.getWage() + "\n薪水增长额： " + this.getGrowWage() +
"元/年" + "\n工作年限： " + this.getTime() + "\n薪水增长额： " +
this.grow() + "\n增长后工资总额： " + this.sum());
}
}
public class Task17{
public static void main(String args[]){
Employee emp = null;
emp = new Employee();
emp.setName("张三");
emp.setNumber("2001");
emp.setWage(5000);
emp.setGrowWage(100);
emp.setTime(5);
emp.grow();
emp.sum();
emp.print();
}
}第三题：
public class Task18{
public static void main(String args[]){
String st = "want you to know one thing";
char c[] = st.toCharArray();
int a = 0; //定义表示字母 n 出现的次数
int b = 0; //定义表示字母 o 出现的次数
for(int i=0;i第四题：
class Dog{
private String name;
private String colour;
private int age;
public void setName(String name){
this.name = name;
}
public void setColour(String colour){
this.colour = colour;
}
public void setAge(int age){
this.age = age;
}
public String getName(){
return name;
}
public String getColour(){
return colour;
}
public int getAge(){
return age;
}
public Dog(String name,String colour,int age){
this.name = name;
this.colour = colour;
this.age = age;
}
public void print(){
System.out.println("狗名： " + this.name + "\n狗色： " +
this.colour + "\n狗龄： " + this.age );
}
}
public class Task19{
public static void main(String args[]){
Dog dog = new Dog("张三","红色",2);
dog.print();
}
}第五题:
class User{
private String name;
private String password;
private int number;
public User(){
}
public User(String name){
this.name = name;
}
public User(String name,String password){
this.name = name;
this.password = password;
}
public void setPassword(String password){
this.password = password;
}
public String getPassword(){
return password;
}
public User fun(){
User user = new User(this.name);
user.setPassword(this.password);
return user;
}
}
第六题:
public class Task23{
public static void main(String args[]){
String a = "Java 技术学习班 20070326";
System.out.println("(1)" + a.substring(11));
String t = "MLDN JAVA";
System.out.println("(2)" + t.replace("JAVA","J2EE") );
System.out.println("(3)" + a.charAt(8-1));
System.out.println("(4)" + a.replace("0",""));
System.out.println("(5)" + a.replace(" ",""));
String sfz = "350783191010238754";
System.out.println("(6)" + sfz.substring(6,14));
}
}第七题:
class Personnel{
private String number;
private String name;
private int wage;
private String department;
public Personnel(String number){
this.number = number;
this.name = "无名氏";
this.wage = 0;
this.department = "未定";
}
public Personnel(String number,String name){
this.number = number;
this.name = name;
this.wage = 1000;
this.department = "后勤";
}
public Personnel(String number,String name,String department,int wage){
this.name = name;
this.number = number;
this.wage = wage;
this.department = department;
}
public Personnel(){
}
public void print(){
System.out.println("工号： " + this.number + "\n姓名： " +
this.name + "\n部门： " + this.department + "\n薪水： " + this.wage);
}
}
public class Task21{
public static void main(String args[]){
Personnel per1 = new Personnel();
Personnel per2 = new Personnel("20051420");
Personnel per3 = new Personnel("10056352","张老三");
Personnel per4 = new Personnel("30054520","李二狗","教育部",800);
per1.print();
per2.print();
per3.print();
per4.print();
}
}第八题：
class BankAccount{
private String name;
private double balance;
public BankAccount(String name,double balance){
this.name = name;
this.balance = balance;
}
public double lookup(){
return this.balance;
}
}
public class Task22{
public static void main(String args[]){
BankAccount ac = new BankAccount("李二",150023601.2);
System.out.println(ac.lookup());
}
}第九题：
class Book{
private String name;
private static String number;
private String price;
private static int tome;
public static String getNumber(){
return number;
}
public static int getTome(){
return tome;
}
public Book(){
tome++;
this.number = "1000" + tome;
}
}
public class Task24{
public static void main(String args[]){
Book b[] = new Book[10];
for(int i=0;i