我正在编写一个程序,用于收集员工的名字、姓氏和销售额。我的所有基础功能都运行良好,但我有一个问题。在我的 while 循环中,我对其进行了编程,因此如果用户输入“add”,那么它将调用我在不同类中创建的方法,并将他们输入的任何数字添加到员工当前的销售总额中,减法也是如此。但是如果我需要编写一个 if 语句来检查减法是否不成功以及是否显示“错误”。
public class EmployeeInfo
{
//class constants
//class variables
private String firstName;
private String lastName;
private int itemsSold;
private int employeeTotal;
public EmployeeInfo(String first, String last, int sold)
{
//local constants
//local variables
/******************** Start Constructor *****************/
//Calls the first and last name, and the amount of items sold
firstName = first;
lastName = last;
itemsSold = sold;
}//End constructor
public void addition(int itemsSold)
{
//local constants
//local variables
/******************** Start main method *****************/
//Adds the items sold to the employee total
employeeTotal = itemsSold + employeeTotal;
}//end addition
public void subtraction(int itemsSold)
{
//local constants
//local variables
/******************** Start main method *****************/
//Subtracts the items not sold to the employee total
employeeTotal = (employeeTotal - itemsSold);
}//end subtraction
public boolean booleanMethod(boolean result)
{
//local constants
//local variables
/******************** Start main method *****************/
if(employeeTotal < 0)
{
result = false;
}
else
{
result = true;
}
return result;
}//End booleanMethod
public String toString()
{
//local constants
//local variables
/******************************************************/
return String.format(Util.setLeft(45,"Eployee Name and Sales Figures") + "\n\n" + Util.setLeft(40, "First Name: ") + Util.setRight(30, firstName) +
"\n" + Util.setLeft(40, "Last Name : ") + Util.setRight(30, lastName) + "\n" + Util.setLeft(40, "Items Sold: ") + Util.setRight(30, Integer.toString(employeeTotal)));
}//end to string
}//end employeeInfo
这是使用 booleanMethod 方法的类的一部分
while(soldItems != QUIT)
{
//Clear screen then prompt the user to add or subtract
System.out.print("\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n");
System.out.print(Util.setLeft(35, "Add or Subtract: "));
input = Keyboard.readString();
System.out.print("\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n");
//if the user enters add the program will add to the employee total
if(input.equals(ADD))
{
info.addition(soldItems);
}
//else the program will subtract from the employee total
else
{
info.subtraction(soldItems);
if (info.booleanMethod(false))
{
System.out.print("Error");
System.out.print("\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n");
}
}
该工具成功完成,但它不显示错误消息,它只显示我的行,询问另一个销售数据,我如何让它实际工作?
最佳答案
首先放置减法
的责任来执行验证...
public boolean subtraction(int itemsSold)
{
//local constants
//local variables
/******************** Start main method *****************/
//Subtracts the items not sold to the employee total
employeeTotal = (employeeTotal - itemsSold);
return employeeTotal < 0;
}//end subtraction
然后简单地使用返回结果来确定应该做什么...
if (!info.subtraction(soldItems)) {
//...
}
恕我直言,减法
实际上应该在达到可能的无效状态之前停止,例如......
public boolean subtraction(int itemsSold)
{
//local constants
//local variables
/******************** Start main method *****************/
if (employeeTotal - itemsSold >= 0) {
//Subtracts the items not sold to the employee total
employeeTotal = (employeeTotal - itemsSold);
return true;
}
return false;
}//end subtraction
关于java - 如何将一个类中 boolean 方法的结果获取到Java中另一个类的if语句中?,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/47274060/