6) What is the output of the following Java code? Why the last two lines in the output are the same?

public class VariableLengthParameters {

private static int add ( int ... items ) {

int total = 0;

for ( int i = 0; i < items.length; i++ )

total = total + items[i];

return total;

}

public static void main( String[] args ) {

System.out.println( add( new int[] { 1 } ) );

System.out.println( add( 1 ) );

System.out.println( add( new int[] { 1,2,3 } ) );

System.out.println( add( 1, 2, 3 ) );

}

}