# 16, large number operation (BigInteger, BigDecimal)

Source: Internet
Author: User
Tags mul

` PackageCom.lei.duixiang;ImportJava.math.BigDecimal;ImportJava.math.BigInteger; Public classBignum {/*** Large number operation (BigInteger, BigDecimal) * difference: BigDecimal added the concept of decimal, it supports the fixed-point number of any precision *@paramargs*/    //large number operation (BigInteger)     Public Static voidBigintegerdemo () {BigInteger BigInteger=NewBigInteger ("4");//instantiate a large number//take this large number plus 2 operationSYSTEM.OUT.PRINTLN ("addition Operation:" +biginteger.add (NewBigInteger ("2"))); //take this large number minus 2 operations.System.out.println ("Subtraction Operation:" +biginteger.subtract (NewBigInteger ("2"))); //take the large number by the 2 operationSystem.out.println ("Multiplication Operation:" +biginteger.multiply (NewBigInteger ("2"))); //take the large number except for the 2 operationSYSTEM.OUT.PRINTLN ("Division Operation:" +biginteger.divide (NewBigInteger ("2"))); //take the big number in addition to 3 of the quotientSystem.out.println ("Pick-up:" +biginteger.divideandremainder (NewBigInteger ("3")) ); //take the remainder of the large number except 3System.out.println ("Pick-up:" +biginteger.divideandremainder (NewBigInteger ("3")) ); //take the big number 2 timesSystem.out.println ("Do 2-square operation:" +biginteger.pow (2)); //take the opposite number of the large numberSystem.out.println ("Take the opposite number of actions:" +biginteger.negate ()); }    //large number operation (BigDecimal)    Static Final intLocation = 10; /*** Define addition method with parameters of Addend and Summand *@paramargs*/     PublicBigDecimal Add (DoubleD1,DoubleD2) {//addition//instantiating a Decimal objectBigDecimal B1 =NewBigDecimal (double.tostring (D1)); BigDecimal B2=NewBigDecimal (double.tostring (D2)); returnB1.add (B2);//Call the addition method    }         PublicBigDecimal Sub (DoubleD1,DoubleD2) {//Subtraction//instantiating a Decimal objectBigDecimal B1 =NewBigDecimal (double.tostring (D1)); BigDecimal B2=NewBigDecimal (double.tostring (D2)); returnB1.subtract (B2);//calling the subtraction method    }         PublicBigDecimal Mul (DoubleD1,DoubleD2) {//multiplication//instantiating a Decimal objectBigDecimal B1 =NewBigDecimal (double.tostring (D1)); BigDecimal B2=NewBigDecimal (double.tostring (D2)); returnB1.multiply (B2);//call the Multiplication method    }         PublicBigDecimal Div (DoubleD1,DoubleD2) {//Division                returnDiv (d1,d2,location);//calling a custom division method    }    //define the starting method, the parameters are the divisor and the divisor, and the number of digits after the quotient decimal point     PublicBigDecimal Div (DoubleD1,DoubleD2,intb) {        if(b < 0) {System.out.println ("B value must be greater than or equal to 0"); } BigDecimal B1=NewBigDecimal (double.tostring (D1)); BigDecimal B2=NewBigDecimal (double.tostring (D2)); //Call the division method, keep the B-bit after the decimal point, and round the result to the Operation        returnB1.divide (B2, B, bigdecimal.round_half_up); }        //Division                 Public Static voidMain (string[] args) {//large number operation (BigInteger)Bigintegerdemo (); System.out.println ("--------------------"); Bignum b=NewBignum (); System.out.println ("Two numbers Add Result:" +b.add (-7.5, 8.9)); System.out.println ("Two digit subtraction Result:" +b.sub (-7.5, 8.9)); System.out.println ("Two numbers Multiply results:" +b.mul (-7.5, 8.9)); System.out.println ("Two numbers divide the result, and the result is 10 bits after the decimal:" +b.div (10, 2)); System.out.println ("Divide two numbers and leave 5 decimal places:" +b.div (-7.5, 8.9,5)); }}`

16, large number operation (BigInteger, BigDecimal)

Related Keywords:

The content source of this page is from Internet, which doesn't represent Alibaba Cloud's opinion; products and services mentioned on that page don't have any relationship with Alibaba Cloud. If the content of the page makes you feel confusing, please write us an email, we will handle the problem within 5 days after receiving your email.

If you find any instances of plagiarism from the community, please send an email to: info-contact@alibabacloud.com and provide relevant evidence. A staff member will contact you within 5 working days.

## A Free Trial That Lets You Build Big!

Start building with 50+ products and up to 12 months usage for Elastic Compute Service

• #### Sales Support

1 on 1 presale consultation

• #### After-Sales Support

24/7 Technical Support 6 Free Tickets per Quarter Faster Response

• Alibaba Cloud offers highly flexible support services tailored to meet your exact needs.