BigDecimal type comparison size

if(a.compareTo(b) == -1){
System.out.println(“a小于b”);
}

if(a.compareTo(b) == 0){
System.out.println(“a等于b”);
}

if(a.compareTo(b) == 1){
System.out.println(“a大于b”);
}

if(a.compareTo(b)> -1){ System.out.println("a is greater than or equal to b"); }

if(a.compareTo(b) <1){ System.out.println("a is less than or equal to b"); }