java - Add Function to BigDecimal variables -

i working calculations - time use bigdecimal. have created special util make easier make comparisons:

public class bigdecimalutil {      public static boolean iszero(bigdecimal value) {         return value == null?false:value.compareto(bigdecimal.zero) == 0;     }         public static boolean ispositive(bigdecimal value) {         return value == null?false:value.compareto(bigdecimal.zero) > 0;     }      public static boolean isnegative(bigdecimal value) {         return value == null?false:value.compareto(bigdecimal.zero) < 0;     }      public static boolean isequal(bigdecimal value1, bigdecimal value2) {         return value1.compareto(value2) == 0;     }      public static boolean islessthan(bigdecimal value1, bigdecimal value2) {         return value1.compareto(value2) < 0;     }      public static boolean ismorethan(bigdecimal value1, bigdecimal value2) {         return value1.compareto(value2) > 0;     } } 

but not comfortable use times. there way add functionality directly bigdecimal class?

lets this:

bigdecimal number = new bigdecimal("0"); if(number.ispositive){     //do  } 

in case ispositive function util.

it's not possible unless you're willing extend bigdecimal class, in case can try this:

public class bigdecimal2 extends bigdecimal {     public boolean ispositive() {         return compareto(bigdecimal.zero) > 0;     }     //... }