我已经寻找了 40 多分钟,试图在这个网站上找到可能与我的问题有关的答案,但无济于事。
我难住了。我正在尝试将程序转换为 GUI。我正在使用 Textpad,它在编译时告诉我该变量已在 main 方法中定义。然后当转换为 int 或 double 时,它告诉我它找不到符号并指向我要转换的变量。然后在我的计算过程中,它告诉我二元运算符“*”的操作数类型错误。
import javax.swing.JOptionPane;
public class PayrollGUI {
// calculates payroll
public static void main (String [] args) {
String name = JOptionPane.showInputDialog ("Employee's Name: ");
int name = Integer.parseInt(nameString);
String hours = JOptionPane.showInputDialog ("Number of hours worked in a week (e.g., 10: ");
int hours = Integer.parseInt(hoursString);
String payRate = JOptionPane.showInputDialog ("Hourly pay rate (e.g., .6.75: ");
double payRate = Double.parseDouble(payRateString);
String federalTaxRate = JOptionPane.showInputDialog ("Federal tax witholding rate (e.g., .20: ");
double federalTaxRate = Double.parseDouble(federalTaxRateString);
String stateTaxRate = JOptionPane.showInputDialog (" State tax witholding rate (e.g., .09: ");
double stateTaxRate = Double.parseDouble(stateTaxRateString);
//calculate witholdings, grosspay and netpay
double federalWitholding = federalTaxRate * (hours * payRate);
double stateWitholding = stateTaxRate * (hours * payRate);
double grossPay = hours * payRate;
double netPay = grossPay - withholdings;
double witholdings = federalWithodling + stateWitholding;
//format to keep two digit decimal
witholdings = (int) (witholdings * 100) /100.0;
netPay = (int) (netPay * 100) / 100.0;
grossPay = (int) (grossPay * 100) / 100.0;
federalWitholding = (int) (federalWitholding * 100) / 100.0;
stateWitholding = (int) (stateWitholding *100) / 100.0;
/*String output = (null);
String output = (null);*/
String output = "Employee Name: " + name +
"/nHours Worked: " + hours +
"/nPay Rate: $" + payRate +
"/nGross Pay: $" + grossPay +
"/nDeductions:" +
"/n Federal Witholding: $" + federalWitholding +
"/n State Witholding : $" + stateWitholding +
"/n Total Deductions : $" + witholdings +
"/n Net Pay: $";
JOptionPane.showMessageDialog(null, output);
}//end main
}//end Payroll