Array array1 = new Array();
array1.add( new Integer( 3 ) );
array1.add( new Integer( -1 ) );
array1.add( new Integer( 2 ) );
UnaryPredicate predicate = new PositiveNumber();
int n = Counting.countIf( array1, predicate );
System.out.println( "# of positive numbers in " + array1 + " = " + n );
Array array2 = new Array();
Removing.removeCopyIf( array1, array2, predicate );
System.out.println( "Array without positive numbers = " + array2 );