java中大数运算Biginteger类的方法调用

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/**

* 大数运算

* BigInteger

* 求91的92次方

* 求它除以100的余数

* 大数运算Biginteger类的方法调用

package com.test1;

import java.math.*;

import java.math.BigInteger;

publicclass test100 {

/**

* @param args

static BigIntegerk=BigInteger.valueOf(1);

static BigIntegerj=BigInteger.valueOf(91);

static BigIntegern;

BigDecimal l=new BigDecimal("100");

static BigIntegerm=new BigInteger("100");

publicstaticvoid main(String[] args) {

//TODO Auto-generatedmethod stub

// k=BigInteger.valueOf(1);

// k=new BigInteger("1");

for(int i=1;i<=92;i++){

k=k.multiply(j);

System.out.println(k.toString());

// n=k.remainder(m);

n=k.remainder(m);

System.out.println(n.toString());

}

//java大数运算Biginteger类的方法调用

//以下代码与本练习没有必要关系，可以删除

class BigIntegerGet

{

public String getAdd(StringStr1,String Str2){

String Str3=new String();

BigInteger BigInt1=new BigInteger(Str1);

BigInteger BigInt2=new BigInteger(Str2);

BigInt1=BigInt1.add(BigInt2);//加

Str3=BigInt1.toString();

return Str3;

}

public String getSubtract(StringStr1,String Str2){

String Str3=new String();

BigInteger BigInt1=new BigInteger(Str1);

BigInteger BigInt2=new BigInteger(Str2);

BigInt1=BigInt1.subtract(BigInt2);//减

Str3=BigInt1.toString();

return Str3;

}

public String getMultiply(StringStr1,String Str2){

String Str3=new String();

BigInteger BigInt1=new BigInteger(Str1);

BigInteger BigInt2=new BigInteger(Str2);

BigInt1=BigInt1.multiply(BigInt2);//乘

Str3=BigInt1.toString();

return Str3;

}

public String getDivide(StringStr1,String Str2){

String Str3=new String();

BigInteger BigInt1=new BigInteger(Str1);

BigInteger BigInt2=new BigInteger(Str2);

BigInt1=BigInt1.divide(BigInt2);//除

Str3=BigInt1.toString();

return Str3;

}

public String getRemainder(StringStr1,String Str2){//％

String Str3=new String();

BigInteger BigInt1=new BigInteger(Str1);

BigInteger BigInt2=new BigInteger(Str2);

BigInt1=BigInt1.remainder(BigInt2);//余数

Str3=BigInt1.toString();

return Str3;

}

public String getGcd(StringStr1,String Str2){

String Str3=new String();

BigInteger BigInt1=new BigInteger(Str1);

BigInteger BigInt2=new BigInteger(Str2);

BigInt1=BigInt1.gcd(BigInt2);//最大公约数

Str3=BigInt1.toString();

return Str3;

}

public String getPow(StringStr1,String Str2){

String Str3=new String();

BigInteger BigInt1=new BigInteger(Str1);

int Int2=Integer.valueOf(Str2);

BigInt1=BigInt1.pow(Int2);//方

Str3=BigInt1.toString();

return Str3;

}

public String getMod(StringStr1,String Str2){

String Str3=new String();

BigInteger BigInt1=new BigInteger(Str1);

BigInteger BigInt2=new BigInteger(Str2);

BigInt1=BigInt1.mod(BigInt2);//模

Str3=BigInt1.toString();

return Str3;

}

public String getModInverse(StringStr1,String Str2){

String Str3=new String();

BigInteger BigInt1=new BigInteger(Str1);

BigInteger BigInt2=new BigInteger(Str2);

BigInt1=BigInt1.modInverse(BigInt2);//倒数取模

Str3=BigInt1.toString();

return Str3;

}

public String getMax(StringStr1,String Str2){

String Str3=new String();

BigInteger BigInt1=new BigInteger(Str1);

BigInteger BigInt2=new BigInteger(Str2);

BigInt1=BigInt1.max(BigInt2);//返回较大一个数的值

Str3=BigInt1.toString();

return Str3;

}

public String getMin(StringStr1,String Str2){

String Str3=new String();

BigInteger BigInt1=new BigInteger(Str1);

BigInteger BigInt2=new BigInteger(Str2);

BigInt1=BigInt1.min(BigInt2);//返回较小一个数的值

Str3=BigInt1.toString();

return Str3;

}

publicint getHashcode(String Str){

int hash=-1;

BigInteger BigInt=new BigInteger(Str);

hash=BigInt.hashCode();

return hash;

}

publicboolean getIsProbablePrime(String Str,int certainty){

boolean flag=false;

BigInteger BigInt=new BigInteger(Str);

flag=BigInt.isProbablePrime(certainty);//素数

return flag;

}

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