Thread: return

class aa7
{
public static void main (String[] args)
{
System.out.println("HOURS IN A DAY: "+Hours(int days=2));
}
public class Hours{
   private static final int NUMBER_OF_HOURS_IN_A_DAY = 24;
 
   public int calculateHoursInDays(int days)
  {
     return days * NUMBER_OF_HOURS_IN_A_DAY;
   }
}
}

I want printout :48



Errors :

--------------------Configuration: <Default>--------------------
C:\aa7.java:5: error: '.class' expected
System.out.println("HOURS IN A DAY: "+Hours(int days=2));
^
C:\aa7.java:5: error: ';' expected
System.out.println("HOURS IN A DAY: "+Hours(int days=2));
^
2 errors

Process completed.

General output :
Error: Could not find or load main class aa7

when the error says could not load main class aa7, it probably should be an issue with the name of your file. You should know that in java, the name of the main class should be same as the file name. Here you file name should be aa7.java.

Next
System.out.println("HOURS IN A DAY: "+Hours(int days=2));
This is completely a wrong statement in java.
you do not declare anything where parameter is passed. It should only be Hours(2).

Rename public class Hours as public static class Hours and public int calculateHoursInDays(int days) as public static int calculateHoursInDays(int days)

This should help you.

Code after changes :

class b
{
public static void main (String[] args)
{
System.out.println("HOURS IN A DAY: "+Hours(2));
}
public static class Hours{
   private static final int NUMBER_OF_HOURS_IN_A_DAY = 24;
 
   public static int calculateHoursInDays(int days)
  {
     return days * NUMBER_OF_HOURS_IN_A_DAY;
   }
}
}

Output/errors :

C:\Documents and Settings\dipak\Desktop>javac b.java
b.java:5: error: cannot find symbol
System.out.println("HOURS IN A DAY: "+Hours(2));
^
symbol: method Hours(int)
location: class b
1 error

C:\Documents and Settings\dipak\Desktop>

dipakshah8944
sorry for my rude question: Are you a Java rookie? Your program is garbage. Here is how your program should be:

class b {
	public static void main (String[] args) {
		System.out.println("HOURS IN A DAY: "+Hours(2));
	}
	public static int Hours(int day)  {
		final int NUMBER_OF_HOURS_IN_A_DAY = 24;
		return day * NUMBER_OF_HOURS_IN_A_DAY;
	}
}

class b
{
public static void main (String[] args)
{
b class1 = new b();
b.Hours class2 = new b.Hours();
 
System.out.println("HOURS IN A DAY: "+ class2.calculateHoursInDays(2));
}
 
public static class Hours{
   private final int NUMBER_OF_HOURS_IN_A_DAY = 24;
 
   public  int calculateHoursInDays(int days)
  {
     return days * NUMBER_OF_HOURS_IN_A_DAY;
   }
}
}

Try this code
When you have a class within another class, this is how you call the method
b class1 = new b();
b.Hours class2 = new b.Hours();

Thanks kindk12.

Originally Posted by Voodoo

dipakshah8944
sorry for my rude question: Are you a Java rookie? Your program is garbage. Here is how your program should be:

class b {
	public static void main (String[] args) {
		System.out.println("HOURS IN A DAY: "+Hours(2));
	}
	public static int Hours(int day)  {
		final int NUMBER_OF_HOURS_IN_A_DAY = 24;
		return day * NUMBER_OF_HOURS_IN_A_DAY;
	}
}

java rookie? garbage? sorry? are these java ?