我必须为分配创建一个面向对象的程序，我在第 9 行和第 30 行都得到相同的错误。我知道我试图创建错误的摄氏和华氏对象，但我不知道该怎么做正确。
import java.io.*;
class Celsius
{
String inData;
int celsius;
int temperature;
Celsius();
{
InputStreamReader inStream = new InputStreamReader (System.in);
BufferedReader stdin = new BufferedReader (inStream);
System.out.println("Enter a temperature in degres fahrenheit.");
inData = stdin.readLine();
temperature = Integer.parseInt(inData);
celsius = (5 / 9) * (temperature - 32);
System.out.println("Your temperature in degrees celsius is: " + celsius);
}
}
class Fahrenheit
{
String inData;
int fahrenheit;
int temperature;
Fahrenheit();
{
InputStreamReader inStream = new InputStreamReader (System.in);
BufferedReader stdin = new BufferedReader (inStream);
System.out.println("Enter a temperature in degrees celsius.");
inData = stdin.readLine();
temperature = Integer.parseInt(inData);
fahrenheit = (9 / 5) * temperature + 32;
System.out.println("Your temperature in degrees fahrenheit is: " + fahrenheit);
}
}
class TemperatureTest
{
public static void main(String[] args) throws IOException
{
InputStreamReader inStream = new InputStreamReader (System.in);
BufferedReader stdin = new BufferedReader (inStream);
String inData;
int selection;
System.out.println("Input 1 to convert fahrenheit to celsius");
System.out.println("Input 2 to convert celsius to fahrenheit");
inData = stdin.readLine();
selection = Integer.parseInt(inData);
if (selection == 1)
{
Celsius c1 = new Celsius();
}
if (selection == 2)
{
Fahrenheit f1 = new Fahrenheit();
}
if (selection != 1 & selection != 2)
{
System.out.println("Invalid selection.");
}
}
}