CODEWITHSUNDEEP
java
user2985529
user2985529

Reputation: 1

Missing body, or declare abstract java error message

I have to make an object-oriented program for an assignment, I get the same error on both line 9 and 30. I know that I'm trying to create the Celsius and Fahrenheit objects wrong, but I am not sure how to do it correctly. 

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.");
    }
    }
}

Upvotes: 0

Views: 345

Answers (1)

rgettman
rgettman

Reputation: 178243

The errors are on your constructors:

Celsius();
{

and

Fahrenheit();
{

There should be no semicolon between a constructor/method and its block. Remove those semicolons:

Celsius()
{

Fahrenheit()
{

Additionally, in Java, integer division occurs when two ints are divided, which must yield an int. Consequently, (9 / 5) will yield 1, and (5 / 9) will yield 0.

Make your variables double, and use a double literal for your constants (or cast one of them as a double), to use floating-point division:

(9.0 / 5.0)

or

( (double) 9 / 5)

Upvotes: 2

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