我现在只是在用 Java 做 OOP，而且我遇到了一些问题。我有 2 个问题，最大的是对象没有正确显示。在我的employee.java 类中，我有以下代码用于显示员工/工人。
public String getInfo() {
return firstName + " " + lastName + "\n" + address + "\n" + city +
"\n" + wageRate + "\n" + hoursWorked;
}
现在，在employeeTest.java我进行大部分处理和更新的地方，我为单独的对象创建了以下内容：
//instantiate 4 employee objects
employees worker1 = new employees();
employees worker2 = new employees();
employees worker3 = new employees();
employees worker4 = new employees();
之后，我尝试更新员工并在使用以下代码后立即显示它们（由于测试原因，它不完整）。
//declare variables to update employees
String newFirstName1, newFirstName2, newFirstName3, newFirstName4;
String newLastName1, newLastName2, newLastName3, newLastName4;
String newAddress1, newAddress2, newAddress3, newAddress4;
String newCity1, newCity2, newCity3, newCity4;
int newHoursWorked1, newHoursWorked2, newHoursWorked3, newHoursWorked4;
int newWageRate1, newWageRate2, newWageRate3, newWageRate4;
//update the employee (in progress)
System.out.println("Please enter Employee 1's first name:");
newFirstName1 = conIn.nextLine();
System.out.println("Please enter Employee 1's last name:");
newLastName1 = conIn.nextLine();
System.out.println("Please enter Employee 1's address:");
newAddress1 = conIn.nextLine();
System.out.println("Please enter Employee 1's city:");
newCity1 = conIn.nextLine();
System.out.println("Please enter Employee 1's hours worked:");
newHoursWorked1 = conIn.nextInt();
System.out.println("Please enter Employee 1's wage rate:");
newWageRate1 = conIn.nextInt();
worker1.setFirstName(newFirstName1);
worker1.setLastName(newLastName1);
//Display the employees
System.out.println("Employee 1");
System.out.println("----------------------");
System.out.println(worker1.getInfo());
System.out.println("Employee 2");
System.out.println("----------------------");
System.out.println(worker2.getInfo());
System.out.println("Employee 3");
System.out.println("----------------------");
System.out.println(worker3.getInfo());
System.out.println("Employee 4");
System.out.println("----------------------");
System.out.println(worker4.getInfo());
但是，这会更新所有工作人员。前任。我输入“John”作为名字，worker1-4都更新为名字“John”。我只想worker1更新，所以我知道它有效。
第二个问题是在执行和测试代码时跳过了以下代码。
//change the company name
String newCompanyName;
System.out.println("Please enter a new company name:");
newCompanyName = conIn.nextLine();
employees.setCompanyName(newCompanyName);
编辑 3
employeeTest.java下面的代码
/*
* To change this template, choose Tools | Templates
* and open the template in the editor.
*/
package employeerionmurphy;
import employeerionmurphy.employees.*;
import java.util.*;
/**
*
* @author Owner
*/
public class employeeTest {
/**
* @param args the command line arguments
*/
public static void main(String[] args) {
// TODO code application logic here
//declare scanner
Scanner conIn = new Scanner(System.in);
//instantiate 4 employee objects
employees worker1 = new employees();
employees worker2 = new employees();
employees worker3 = new employees();
employees worker4 = new employees();
//Display the employees
System.out.println("Employee 1");
System.out.println("----------------------");
System.out.println(worker1.getInfo());
System.out.println("Employee 2");
System.out.println("----------------------");
System.out.println(worker2.getInfo());
System.out.println("Employee 3");
System.out.println("----------------------");
System.out.println(worker3.getInfo());
System.out.println("Employee 4");
System.out.println("----------------------");
System.out.println(worker4.getInfo());
//spacer for user readability
System.out.println("");
System.out.println("--------------------------------------------");
System.out.println("");
//declare variables to update employees
String newFirstName1, newFirstName2, newFirstName3, newFirstName4;
String newLastName1, newLastName2, newLastName3, newLastName4;
String newAddress1, newAddress2, newAddress3, newAddress4;
String newCity1, newCity2, newCity3, newCity4;
int newHoursWorked1, newHoursWorked2, newHoursWorked3, newHoursWorked4;
int newWageRate1, newWageRate2, newWageRate3, newWageRate4;
//update the employee (in progress)
System.out.println("Please enter Employee 1's first name:");
newFirstName1 = conIn.nextLine();
System.out.println("Please enter Employee 1's last name:");
newLastName1 = conIn.nextLine();
System.out.println("Please enter Employee 1's address:");
newAddress1 = conIn.nextLine();
System.out.println("Please enter Employee 1's city:");
newCity1 = conIn.nextLine();
System.out.println("Please enter Employee 1's hours worked:");
newHoursWorked1 = conIn.nextInt();
System.out.println("Please enter Employee 1's wage rate:");
newWageRate1 = conIn.nextInt();
worker1.setFirstName(newFirstName1);
worker1.setLastName(newLastName1);
//spacer for user readability
System.out.println("");
System.out.println("--------------------------------------------");
System.out.println("");
//upgrade the wage rate of the employee that has a wage rate of zero
//(in progress)
//spacer for user readability
System.out.println("");
System.out.println("--------------------------------------------");
System.out.println("");
//display employees
System.out.println("Employee 1");
System.out.println("----------------------");
System.out.println(worker1.getInfo());
System.out.println("Employee 2");
System.out.println("----------------------");
System.out.println(worker2.getInfo());
System.out.println("Employee 3");
System.out.println("----------------------");
System.out.println(worker3.getInfo());
System.out.println("Employee 4");
System.out.println("----------------------");
System.out.println(worker4.getInfo());
//spacer for user readability
System.out.println("");
System.out.println("--------------------------------------------");
System.out.println("");
//display the employees name and gross pay
System.out.println(employees.getTotalPay());
//spacer for user readability
System.out.println("");
System.out.println("--------------------------------------------");
System.out.println("");
//change the company name
String newCompanyName;
System.out.println("Please enter a new company name:");
newCompanyName = conIn.nextLine();
employees.setCompanyName(newCompanyName);
//spacer for user readability
System.out.println("");
System.out.println("--------------------------------------------");
System.out.println("");
//display the employees
System.out.println("Employee 1");
System.out.println("----------------------");
System.out.println(worker1.getInfo());
System.out.println("Employee 2");
System.out.println("----------------------");
System.out.println(worker2.getInfo());
System.out.println("Employee 3");
System.out.println("----------------------");
System.out.println(worker3.getInfo());
System.out.println("Employee 4");
System.out.println("----------------------");
System.out.println(worker4.getInfo());
//spacer for user readability
System.out.println("");
System.out.println("--------------------------------------------");
System.out.println("Built by Rion Murphy");
}
}
employee.java下面的代码
/*
* To change this template, choose Tools | Templates
* and open the template in the editor.
*/
package employeerionmurphy;
import java.util.*;
/**
*
* @author Owner
*/
public class employees {
//declare variables
static String firstName;
static String lastName;
static String address;
static String city;
static int hoursWorked;
static int wageRate;
final double OVERTIME = 40.00;
public static String companyName = "Grand Company";
//declare a constructor to initalize all fields to null
public employees() {
}
//declare a constructor to hold the actual values in the variables.
public employees(String newFirstName, String newLastName,
String newAddress, String newCity, int newHoursWorked, int newWageRate) {
firstName = newFirstName;
lastName = newLastName;
address = newAddress;
city = newCity;
hoursWorked = newHoursWorked;
wageRate = newWageRate;
}
//accessors for the variables
public String getFirstName() {
return firstName;
}
public String getLastName() {
return lastName;
}
public String getAddress() {
return address;
}
public String getCity() {
return city;
}
public int getHoursWorked() {
return hoursWorked;
}
public int getWageRate() {
return wageRate;
}
//mutators for hoursWorked and wageRate
public void setHoursWorked(int newHoursWorked) {
hoursWorked = newHoursWorked;
}
public void setWageRate(int newWageRate) {
wageRate = newWageRate;
}
//mutators for the string variables
public void setFirstName(String newFirstName) {
firstName = newFirstName;
}
public void setLastName(String newLastName) {
lastName = newLastName;
}
public void setAddress(String newAddress) {
address = newAddress;
}
public void setCity(String newCity) {
city = newCity;
}
//company name mutator
public String getCompanyName() {
return companyName;
}
public static void setCompanyName(String newCompanyName) {
companyName = newCompanyName;
}
//printing out employee information
public String getInfo() {
return firstName + " " + lastName + "\n" + address + "\n" + city + "\n" + wageRate + "\n" + hoursWorked;
}
//printing out employee name and totalPay
public static String getTotalPay() {
//calculate total pay
double totalPay;
int overtimeHours;
if (hoursWorked > 40) {
overtimeHours = hoursWorked - 40;
totalPay = (overtimeHours * (wageRate * 1.5)) + (40 * wageRate);
} else {
totalPay = hoursWorked * wageRate;
}
//return the name and the total pay of employee
return firstName + " " + lastName + "\n" + totalPay;
}
//console operations done below
public static void main(String[] args) {
// TODO code application logic here
//Prompt user for all data (use previous mutators to set hoursWorked and wageRate
Scanner conIn = new Scanner(System.in);
System.out.println("Please enter your first name: ");
firstName = conIn.nextLine();
System.out.println("Please enter your last name: ");
lastName = conIn.next();
// Errors detected in the below line of code, will repair at a later date
//
System.out.println("Please enter your address: ");
address = conIn.nextLine();
System.out.println("Please enter your city: ");
city = conIn.nextLine();
System.out.println("Please enter your hours worked: ");
hoursWorked = conIn.nextInt();
System.out.println("Please enter your wage rate: ");
wageRate = conIn.nextInt();
System.out.println("");
//spacer for user readability
System.out.println("");
System.out.println("--------------------------------------------");
System.out.println("");
//print the fields to the console (except the constant)
System.out.println("First Name: " + firstName);
System.out.println("Last Name: " + lastName);
System.out.println("Address: " + address);
System.out.println("City: " + city);
System.out.println("Hours Worked: " + hoursWorked);
System.out.println("Wage Rate: " + wageRate);
System.out.println("Company Name: " + companyName);
//spacer for user readability
System.out.println("");
System.out.println("--------------------------------------------");
System.out.println("");
//calculate and return gross pay (time and a half over 40 hours)
double totalPay;
int overtimeHours;
if (hoursWorked > 40) {
overtimeHours = hoursWorked - 40;
totalPay = (overtimeHours * (wageRate * 1.5)) + (40 * wageRate);
} else {
totalPay = hoursWorked * wageRate;
}
System.out.println("The total pay for " + hoursWorked + " hours is " + totalPay);
//spacer for user readability
System.out.println("");
System.out.println("--------------------------------------------");
System.out.println("");
}
}