Java中BigDecimal如何比较大小呢?

BigDecimal比较大小的实现思路

BigDecimal类
   提供compareTo()方法来比较两个数的大小

例
  a = b返回0
  a < b返回-1
  a > b返回1

使用这三种比较返回的结果 

import java.math.BigDecimal;

public class Application {
    public static void main(String[] args) {
        BigDecimal a = new BigDecimal(10);
        BigDecimal b = new BigDecimal(5);

        if (a.compareTo(b) == 0)
            System.out.println("a = b");

        if (a.compareTo(b) == -1)
            System.out.println("a < b");

        if (a.compareTo(b) == 1)
            System.out.println("a > b");

        if (a.compareTo(b) != 0)
            System.out.println("a != b");

        if (a.compareTo(b) != -1)
            System.out.println("a >= b");

        if (a.compareTo(b) != 1)
            System.out.println("a <= b");
    }
}