Java programming code example of adding two large numbers

Generally, BigInteger and BigDecimal are used to realize large number operation. These two methods represent immutable arbitrary precision integers and immutable signed arbitrary precision decimal numbers (floating point numbers). It is mainly used in high-precision calculation. These two classes make large numbers and high-precision operations in Java very simple. However, this paper does not introduce the implementation of large number operation in Java through the above two methods.

The main idea is: save the two numbers in the string, and then take out each number and put it into the array. Start the calculation from the last bit, calculate the addition, and judge whether to carry. If the carry is the first bit + 1. If it exceeds the length, copy to the new array.

The code is as follows:

result:

summary

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