1. Using the equals() method not only requires the values of the two BigDecimals to be equal, but also requires their scale() to be equal.
BigDecimal d1 = new BigDecimal("123.45"); BigDecimal d2 = new BigDecimal("123.45000"); System.out.println(d1.equals(d2)); // false,因为scale不同 System.out.println(d1.equals(d2.stripTrailingZeros())); // true,因为d2去除尾部0后scale变为2,与d1相同
2. Use the compareTo() method to compare the size of two numbers. It returns -1, 1 and 0 respectively according to the size of the two values, indicating less than, greater than and equal to respectively.
import java.math.BigDecimal; public class Demo { public static void main(String[] args) { BigDecimal d1 = new BigDecimal("123.45"); BigDecimal d2 = new BigDecimal("123.45000"); BigDecimal d3 = new BigDecimal("123.40"); System.out.println(d1.compareTo(d2)); // 0 System.out.println(d1.compareTo(d3));// 1 System.out.println(d3.compareTo(d2));// -1 } }
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