java核心技术之 ArrayList应用【职员薪水管理系统】

你的名字 2022-10-01 03:50 141阅读 0赞

职员薪水管理系统需求如下：

![0_1310751324C33D.gif][]

/\*\*  
\* author:kevin  
\* date:20110-7-15  
\* function:use ArrayList to build a system of EmployeeSalaryMangement ,  
\* the system is useful for manager to add new employee'information,delete employee'information,  
\* update employee'information,and show employee'information.  
\* it's  easy to obtain the OOP.  
\* \*/  
import java.util.ArrayList;  
import java.io.\*;

public class EmployeeSalary \{

public static void main(String\[\] args) throws Exception\{

//create object EmpManage  
  EmpManage empm = new EmpManage();  
    
  InputStreamReader isr = new InputStreamReader(System.in);  
  BufferedReader br = new BufferedReader(isr);  
  //create a menu  
  while(true)  
  \{  
   System.out.println("select what you want to do");  
   System.out.println("select 1:insert new employee");  
   System.out.println("select 2:show information");  
   System.out.println("select 3:delete employee");  
   System.out.println("select 4:update salary");  
   System.out.println("select 5:excit");  
     
   String oper= br.readLine();  
   if (oper.equals("1"))\{  
    System.out.println("input number:");  
      
    String empNo =  br.readLine();  
      
    System.out.println("input name:");  
      
    String empName =  br.readLine();  
      
    System.out.println("input salary:");  
      
    float salary=Float.parseFloat(br.readLine());  
      
    Emp emp = new Emp(empNo,empName,salary);  
      
    empm.addEmp(emp);  
      
   \}else if (oper.equals("2"))\{  
    System.out.println("input number:");  
      
    String empNo =  br.readLine();  
     
    empm.showEmp(empNo);  
   \}else if (oper.equals("3"))\{  
    System.out.println("input number:");  
      
    String empNo =  br.readLine();  
     
    empm.delEmp(empNo);  
   \}else if (oper.equals("4"))\{  
    System.out.println("input number:");  
      
    String empNo =  br.readLine();  
      
    System.out.println("input new salary:");  
      
    float newSalary =Float.parseFloat(br.readLine()) ;  
      
    empm.updateEmp(empNo, newSalary);  
   \}else if (oper.equals("5"))\{  
    //exit system.  
    System.exit(0);  
   \}  
     
  \}

//\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*

//class  Employee  
class Emp  
\{  
 private String empNo;  //employee number  
 private String empName; //employee name  
 private float salary; //employee salary  
   
 public String getEmpNo() \{  
  return empNo;  
 \}  
 public void setEmpNo(String empNo) \{  
  this.empNo = empNo;  
 \}  
 public String getEmpName() \{  
  return empName;  
 \}  
 public void setEmpName(String empName) \{  
  this.empName = empName;  
 \}  
 public float getSalary() \{  
  return salary;  
 \}  
 public void setSalary(float salary) \{  
  this.salary = salary;  
 \}

public Emp(String empNo,String empName,float salary)  
 \{  
  this.empNo = empNo;  
  this.empName = empName;  
  this.salary = salary;  
    
    
 \}

//\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*

//class  EmployeeSalaryManage

class  EmpManage  
\{   
 private ArrayList al = null;  
   
 public EmpManage()  
 \{  
  al = new ArrayList();  
 \}  
 //insert new employee  
 public void addEmp(Emp emp)  
 \{  
  al.add(emp);  
 \}  
 //show information  
 public void showEmp(String empNo)  
 \{   
  for (int i= 0 ;i<al.size();i++)  
  \{

//get object  
   Emp emp = (Emp)al.get(i);  
   if(emp.getEmpNo().equals(empNo))  
   \{  
    System.out.println("The employee is founded:");  
    System.out.println("The employee'number:"+emp.getEmpNo());  
    System.out.println("The employee'name:"+emp.getEmpName());  
    System.out.println("The employee'salary:"+emp.getSalary());  
      
   \}  
  \}  
 \}  
 //delete employee  
 public void delEmp(String empNo)  
 \{  
  for (int i= 0 ;i<al.size();i++)  
  \{

//get object  
   Emp emp = (Emp)al.get(i);  
   if(emp.getEmpNo().equals(empNo))  
   \{  
    System.out.println("The employee which number is "+emp.getEmpNo()  
      +"is deleted successfully");  
    al.remove(i);  
     
   \}  
  \}  
 \}  
   
 //update employee  
 public void updateEmp(String empNo,float newSalary)  
 \{  
  for (int i= 0 ;i<al.size();i++)  
  \{

//get object  
   Emp emp = (Emp)al.get(i);  
   if(emp.getEmpNo().equals(empNo))  
   \{  
    emp.setSalary(newSalary);  
    System.out.println("update successfully");  
   \}  
  \}  
 \}

[0_1310751324C33D.gif]: /images/20220705/f24dbfc30627464da0a3f7044a3f7511.png