Java large number class

The BigInteger classes and BigDecimal classes provided by Java can be used when the primary integer and floating-point precision do not meet the requirements.

Java.math.BigInteger

Java.math.BigInteger provides the method:

1. BigInteger Add (BigInteger Other)
2. BigInteger Subtract (BigInteger other)
3. BigInteger Multiply (BigInteger other)
4. BigInteger Divide (Bigintegr other)
5. int CompareTo (BigInteger other)
6. BigInteger MoD (BigInteger Other)

7. Static BigInteger valueOf (long x)

   The valueof method converts a normal value to a large value:

a＝BigInteger.valueOf(100);

Output Febonacci Series

Output Febonacci The first 100 items of the series. About 93 items will exceed the range of long:

 Public Static void  Fibonacci(){Long[] A=New Long[ -]; for(intI=0;i< -; i++) {if(i==0) {a[0]=0; System. out. Print (a[i]+"\ T");Continue; }Else if(i==1) {a[1]=1; System. out. Print (a[i]+"\ T");Continue; } a[i]=a[i-1]+a[i-2]; System. out. Print (a[i]+"\ T");if((i+1)%5==0) {System. out. println ("");} }    }

Improved:

 Public Static void Fibonacci() {biginteger[] a =Newbiginteger[ $]; for(inti =0; I < $; i++) {if(i = =0) {a[0] = biginteger.valueof (0); System. out. print (A[i] +"\ T");Continue; }Else if(i = =1) {a[1] = biginteger.valueof (1); System. out. print (A[i] +"\ T");Continue; } A[i] = A[i-1].add (A[i-2]); System. out. println ("section"+ i +"item: \ t"+ A[i] +"\ T"); }    }

Java large number class