Java BigInteger

比眉伴天荒 2022-04-13 08:44 203阅读 0赞

### BigInteger概述 ###

可以让超过Integer范围内的数据进行运算

### 构造方法 ###

public BigInteger(String val)

### 成员方法 ###

public BigInteger add(BigInteger val)
    public BigInteger subtract(BigInteger val)
    public BigInteger multiply(BigInteger val)
    public BigInteger divide(BigInteger val)
    public BigInteger[] divideAndRemainder(BigInteger val)

### 案例 ###

import java.math.BigInteger;
    import java.util.Scanner;
    
    /** * @ClassName: BigInt * @ProjectName hp-generator * @Author zhaohp * @Date 2018/11/22 17:16 * @Description: 两个大的整数的运算 */
    
    public class BigInt { 
        BigInteger m1;
        BigInteger m2;
        BigInteger m3;
    
        BigInt(String s1, String s2) { 
            m1 = new BigInteger(s1);
            m2 = new BigInteger(s2);
        }
    
        public void add() { 
            m3 = m1.add(m2);
            System.out.println("两个数的和为：" + m3);
        }
    
        public void cut() { 
            m3 = m1.subtract(m2);
            System.out.println("两个数的差为：" + m3);
        }
    
        public void multiply() { 
            m3 = m1.multiply(m2);
            System.out.println("两个数的积为：" + m3);
        }
    
        public void divide() { 
            m3 = m1.divide(m2);
            System.out.println("两个数的商为：" + m3);
        }
    
        public static void main(String[] args) { 
            String num1 = "123456789123456789123456789";
            String num2 = "987654321987654321987654321";
            BigInt bigInt = new BigInt(num1, num2);
    
            bigInt.add();
            bigInt.cut();
            bigInt.multiply();
            bigInt.divide();
    
    
            System.out.println("请输入一个数字");
            Scanner scan = new Scanner(System.in);
            while (scan.hasNext()) { 
                BigInteger b1 = new BigInteger(scan.nextLine());
                System.out.println("请输入另一个数字");
                BigInteger b2 = new BigInteger(scan.nextLine());
                System.out.println("两个数字的和为：【"+b1.add(b2)+"】");
                System.exit(1);
            }
        }
    }