java - 温度计类逻辑错误

Question

我正在尝试创建一个具有单个构造函数的类，该构造函数接受 double 温度(以摄氏度为单位)，如果温度小于 -273.15，则将其设置为 -273.15。它还计算不同测量单位的其他温度，但这并不重要。由于某种原因，我收到一个逻辑错误，该错误无法纠正小于 -273.15 到 -273.15 的输入。

public class TemperatureC
{


private double temperature;


public TemperatureC(double c)
{
    if (temperature < -273.15)
    {
        temperature = -273.15;
    }
    else
    {
        temperature = c;
    }
}

public TemperatureC()
{
    temperature = -273.15;
}

public double getC()
{
    return temperature;
}

public double getF()
{
    return ((temperature * 1.8) + 32);
}

public double getK()
{
    return (temperature + 273.15);
}

public void setC(double c)
{
    if (temperature >= -273.15)
    {
        temperature = c;
    }

}

}

这就是使用该类的原因。

import java.util.Scanner;

public class TemperatureTester
{
public static void main(String[] args)
{
Scanner thermometer = new Scanner(System.in);
TemperatureC temp = new TemperatureC();

System.out.printf("Please enter the initial temperature:");
double intialTemp = thermometer.nextDouble();
temp.setC(intialTemp);

System.out.println("The current temperature in Celsius is:" + temp.getC());
System.out.println("The current temperature in Fahrenheit is:" + temp.getF());
System.out.println("The current temperature in Kelvin is:" + temp.getK());

System.out.printf("Please enter a new temperature:");
double secondTemp = thermometer.nextDouble();
temp.setC(secondTemp);

System.out.println("The current temperature in Celsius is:"+ temp.getC());
System.out.println("The current temperature in Fahrenheit is:"+ temp.getF());
System.out.println("The current temperature in Kelvin is:"+ temp.getK());

}
}

这是我的错误输出:

Please enter the initial temperature:-900
The current temperature in Celsius is:-900.0
The current temperature in Fahrenheit is:-1588.0
The current temperature in Kelvin is:-626.85
Please enter a new temperature:-900
The current temperature in Celsius is:-900.0
The current temperature in Fahrenheit is:-1588.0
The current temperature in Kelvin is:-626.85

它应该将小于 -273.15 的输入纠正为 -273.15。

Answer 1

您的问题是您正在检查构造函数的默认值。首先将温度设置为 c 或对照 c 进行检查。

public TemperatureC(double c)
{

temperature = c;

if (temperature < -273.15)
{
    temperature = -273.15;
}

这应该有效，作为副作用，不再需要 else