我在理解异常处理时遇到了麻烦，不幸的是，这确实使我感到困惑。因此，我必须使用try and catch块实现由我的老师在另一个代码中创建的异常代码。我了解大多数try和catch块，但我不知道如何使用已创建的异常并在其构造函数中打印出信息。这是她创造的例外之一
* This exception should be used when the hours worked value for an hourly employee
* is found to be less than 1 or greater than 84.
*
* When using this exception, if at all possible, pass a String containing employee SSN
* to the constructor. The SSN will then be displayed as part of the exception message,
* thus allowing the invalid record to be more easily located.
*/
public class InvalidHoursWorkedException extends Exception
{
/**
* No-arg constructor
*/
public InvalidHoursWorkedException()
{
super("\nInvalid Hours Worked");
}
/**
* The following constructor accepts the employee's SSN
* as an argument. The SSN will be displayed in the error message
* for the exception.
*/
public InvalidHoursWorkedException(String ssn)
{
super("\nHours Worked are <1.0 or >84.0 Employee cannot be processed: " + ssn );
}
}
这就是我到目前为止所拥有的。我不知道这是否正确，也不知道如何在InvalidHoursWorkedException的set方法中传递ssn变量。
public class HourlyEmployee extends Employee
/*
* You will need to add a throws clause to the class header.
* List each of the exceptions that may be thrown by the constructor
*/
{
private double hrsWorked;
private double hrlyRate;
// private double weeklyPay; // hourly pay per week
// five-argument constructor -- additional arguments are hours worked & hourly rate
public HourlyEmployee( String first, String last, String ssn,
double hours, double rate ) throws InvalidHoursWorkedException
{
super( first, last, ssn ); // pass to Employee constructor
/*
* Before executing each "set" method for hours worked, test the argument.
* If hours worked does not fall into the proper range, throw the associated exception,
* else, execute the set method.
*/
try
{
setHrsWorked( hours );
}
catch(InvalidHoursWorkedException invalidHoursWorkedException)
{
System.err.printf(invalidHoursWorkedException.getMessage());
}
// validate & store hours worked this week
setHrlyRate( rate ); // validate & store hourly rate
}// end of five item constructor
//set hours worked
public void setHrsWorked( double hours ) throws InvalidHoursWorkedException
{
if(hours < 0 && hours > 84)
throw new InvalidHoursWorkedException();
else
{
hrsWorked = hours;
}
}
这是一些注释后的更改代码。我仍然不知道是否需要在构造函数标头和set方法标头中引发异常
public HourlyEmployee( String first, String last, String ssn,
double hours, double rate ) throws InvalidHoursWorkedException
{
super( first, last, ssn ); // pass to Employee constructor
/*
* Before executing each "set" method for hours worked, test the argument.
* If hours worked does not fall into the proper range, throw the associated exception,
* else, execute the set method.
*/
try
{
setHrsWorked( hours );
}
catch(InvalidHoursWorkedException invalidHoursWorkedException)
{
throw new InvalidHoursWorkedException(ssn);
}
// validate & store hours worked this week
setHrlyRate( rate ); // validate & store hourly rate
}
我觉得我的设定方法仍然没有
public void setHrsWorked( double hours ) throws InvalidHoursWorkedException
{
if(hours < 0 && hours > 84)
throw new InvalidHoursWorkedException();
else
{
hrsWorked = hours;
}
}
最佳答案
好的，这就是您想要自己实现其他逻辑的东西
public class HourlyEmployee extends Employee
{
private double hrsWorked;
private double hrlyRate;
public HourlyEmployee(String first, String last, String ssn,
double hours, double rate) throws InvalidHoursWorkedException {
super(first, last, ssn); // pass to Employee constructor
try {
setHrsWorked(hours);
} catch (InvalidHoursWorkedException invalidHoursWorkedException) {
System.out.println(invalidHoursWorkedException.getMessage());
}
// validate & store hourly rate
}// end of five item constructor
//set hours worked
public void setHrsWorked(double hours) throws InvalidHoursWorkedException {
if (hours > 0 || hours < 84)
throw new InvalidHoursWorkedException();
else {
hrsWorked = hours;
System.out.println("Hours set to "+hrsWorked);
}
}
public static void main(String arr[])
{
try {
HourlyEmployee h = new HourlyEmployee("abc","def","xyz",100,10);
} catch (InvalidHoursWorkedException e) {
System.out.println(e.getMessage());
}
}
}
关于java - 抛出和捕获条款，我们在Stack Overflow上找到一个类似的问题：https://stackoverflow.com/questions/24392803/