java.math.BigDecimal.subtract(BigDecimal subtrahend) 返回一个BigDecimal，其值为 (this - subtrahend), 精度为 max(this.scale(), subtrahend.scale()).
声明
以下是声明java.math.BigDecimal.subtract()方法
public BigDecimal subtract(BigDecimal subtrahend)
参数
subtrahend - 此BigDecimal要减去的值
返回值
此方法返回BigDecimal对象的值减去与减数后的值，即 - subtrahend
import java.math.*;
public class BigDecimalDemo {
public static void main(String[] args) {
// create 3 BigDecimal objects
BigDecimal bg1, bg2, bg3;
bg1 = new BigDecimal("100.123");
bg2 = new BigDecimal("50.56");
// subtract bg1 with bg2 and assign result to bg3
bg3 = bg1.subtract(bg2);
String str = "The Result of Subtraction is " + bg3;
// print bg3 value
System.out.println( str );
}
}