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public class FactorialCalculator
{
	public long factorial( long number )
	{
		if(number <= 1)
			return 1;
		else
			return number * factorial( number - 1);
	}
 
	public void displayFactorials()
	{
		for ( int counter = 0; counter <= 10; counter++)
			System.out.printf( "%d! = %d\n", counter, factorial(counter));
	}
 
}
 
public class FactorialTest
{
	public static void main( String args[])
	{
		FactorialCalculator factorialCalculator = new FactorialCalculator();
		factorialCalculator.displayFactorials();
	}
 
}

Main.java:1: class FactorialCalculator is public, should be declared in a file named FactorialCalculator.java
public class FactorialCalculator
       ^
Main.java:19: class FactorialTest is public, should be declared in a file named FactorialTest.java
public class FactorialTest
       ^
2 errors

Standard output is empty