如何在java中为变量分配非常大的数字？

Question

I'm getting "integer number too large: 1000000000001" for the following code line. How do I make it so that maxValue can hold 1 quadrillion or 1 trillion?

long maxValue = 1000000000001;      //1,000,000,000,001

Answer 1

You need to use a long literal (with an L at the end):

long maxValue = 1000000000001L; //1,000,000,000,001

Note that you don't need to use BigInteger if your numbers are between -2 ⁶³ and 2 ⁶³ -1 (inclusive). (2 ⁶³ -1 = 9223372036854775807L = 0x7fffffffffffffffL.)

Answer 2

This answer is complete.

Java Language Specification:

An integer literal is of type long if it is suffixed with an ASCII letter L or l (ell); otherwise it is of type int (§4.2.1).

Answer 3

You may check for another question and answer before you ask. Someone probably has the same question and got the best answer. See this:

Large Numbers in Java

This is probably what you need.