bigdecimal比较大小

public class TestBigDecimal {
     public static void main(String[] args) {
        BigDecimal b1 = BigDecimal.valueOf(0.00);
        BigDecimal b2 = new BigDecimal(0.00);
        BigDecimal b3 = new BigDecimal("0.00");

        System.out.println(b1);
        System.out.println(b2);
        System.out.println(b3);

        System.out.println("--------------");
        System.out.println("equals比较");
        System.out.println(contrast1(b1,b2));
        System.out.println(contrast1(b1,b3));
        System.out.println(contrast1(b2,b3));
        System.out.println(contrast1(b1,BigDecimal.ZERO));
        System.out.println(contrast1(b2,BigDecimal.ZERO));
        System.out.println(contrast1(b3,BigDecimal.ZERO));

        System.out.println("--------------");

        System.out.println("compareTo比较");
        System.out.println(contrast2(b1,b2));
        System.out.println(contrast2(b1,b3));
        System.out.println(contrast2(b2,b3));
        System.out.println(contrast2(b1,BigDecimal.ZERO));
        System.out.println(contrast2(b2,BigDecimal.ZERO));
        System.out.println(contrast2(b3,BigDecimal.ZERO));

   }

   public static boolean contrast1(BigDecimal b1,BigDecimal b2){
       return b1.equals(b2);
   }

   public static int contrast2(BigDecimal b1,BigDecimal b2){
       return b1.compareTo(b2);
    }
   }

0.0
0
0.00
--------------
equals比较
false
false
false
false
true
false
--------------
compareTo比较
0
0
0
0
0
0