如何对无法存储在一个变量中的大数字进行操作 [英] How can I do operations on big numbers that can't be stored in one variable
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问题描述
在Java中,我希望能够对非常大的整数进行操作(不能长时间存储),我该怎么做?
In Java, I would like to be able to do operations on really big integers (that can't be stored in a long), how can I do that?
有什么最好的方法可以解决这个问题,表现如何?我应该创建自己的包含多个长变量的数据类型吗?
What is the best way to deal with this, with good performances? Should I create my own data type that contains several long variables?
示例:
public class MyBigInteger{
private long firstPart;
private long secondPart;
...
}
public MyBigInteger add(long a, long b){
MyBigInteger res;
// WHAT CAN I DO HERE, I guess I could do something with the >> << operators, but I've never used them!
return res;
}
谢谢!
推荐答案
import java.math.BigInteger;
public class BigIntegerTest {
public BigInteger add(long a, long b){
BigInteger big1 = new BigInteger(Long.toString(a));
BigInteger big2 = new BigInteger(Long.toString(b));
return big1.add(big2);
}
/**
* @param args
*/
public static void main(String[] args) {
System.out.println(new BigIntegerTest().add(22342342424323423L, 234234234234234234L));
}
}
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