java练习_大数运算_BigInteger

/**
* 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;
public class test100 {
/**
* @param args
*/
static BigInteger k=BigInteger.valueOf(1);
static BigInteger j=BigInteger.valueOf(91);
static BigInteger n;
BigDecimal l=new BigDecimal("100");
static BigInteger m=new BigInteger("100");
public static void main(String[] args) {
// TODO Auto-generated method 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(String Str1,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(String Str1,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(String Str1,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(String Str1,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(String Str1,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(String Str1,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(String Str1,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(String Str1,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(String Str1,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(String Str1,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(String Str1,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;
}
public int getHashcode(String Str){
int hash=-1;
BigInteger BigInt=new BigInteger(Str);
hash=BigInt.hashCode();
return hash;
}
public boolean getIsProbablePrime(String Str,int certainty){ boolean flag=false;
BigInteger BigInt=new BigInteger(Str);
flag=BigInt.isProbablePrime(certainty);//素数
return flag;
}
}。