Java之大数字类

 

直接上操作,BIgInteger

import java.math.BigInteger;

public class Main {
    public static void main(String[] args) {
        BigInteger big1 = new BigInteger("4321342342342342");
        BigInteger big2 = new BigInteger("6435634324223");
        System.out.println("加法操作:" + big1.add(big2));
        System.out.println("减法操作:" + big1.subtract(big2));
        System.out.println("乘法操作:" + big1.multiply(big2));
        System.out.println("除法操作:" + big1.divide(big2));
        System.out.println("次方运算:" + big1.pow(2));    // 2次方
        BigInteger[] res = big1.divideAndRemainder(big2);   // 求余
        System.out.println("商:" + res[0] + "、余:" + res[1]);
    }
}
Java之大数字类
如果在计算中不超过数据类型的长度,不建议使用大数字类计算,因为这种方法的性能很低。

 

下面是BigDecimal:

BigDecimal可以进行小数运算。

package Demo_2_3_BigDeciaml;

import java.math.BigDecimal;
import java.math.BigInteger;

public class Main {
    public static void main(String[] args) {
        BigDecimal big1 = new BigDecimal("123123124345346.213");
        BigDecimal big2 = new BigDecimal("524576345252.542");
        System.out.println("加法操作:" + big1.add(big2));
        System.out.println("减法操作:" + big1.subtract(big2));
        System.out.println("乘法操作:" + big1.multiply(big2));
        System.out.println("次方运算:" + big1.pow(2));    // 2次方
        BigDecimal[] res = big1.divideAndRemainder(big2);   // 求余
        System.out.println("商:" + res[0] + "、余:" + res[1]);
    }
}
Java之大数字类

 


 

 

 

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