将以下代码改错：import java.math.*; class BigIntegerExample { public static void main(String args[]) { BigInteger n1=new BigInteger("987654321987654321987654321"), n2=new BigInteger("123456789123456789123456789"), result=null; result=【代码1】//n1和n2做加法运算 System.out.println("和:"+result.toString()); result=【代码2】//n1和n2做减法运算 System.out.println("差:"+result.toString()); result=【代码3】//n1和n2做乘法运算 System.out.println("积:"+result.toString()); result=【代码4】//n1和n2做除法运算 System.out.println("商:"+result.toString()); BigInteger m=new BigInteger("1968957"), COUNT=new BigInteger("0"), ONE=new BigInteger("1"), TWO=new BigInteger("2"); System.out.println(m.toString()+"的因子有:"); for(BigInteger i=TWO;i.compareTo(m)<0;i=i.add(ONE)) { if((n1.remainder(i).compareTo(BigInteger.ZERO))==0) { COUNT=COUNT.add(ONE); System.out.print(" "+i.toString()); } } System.out.println(""); System.out.println(m.toString()+"一共有"+COUNT.toString()+"个因子"); } }

import java.math.*;

class BigIntegerExample {
public static void main(String args[]) {
BigInteger n1 = new BigInteger("987654321987654321987654321"),
n2 = new BigInteger("123456789123456789123456789"),
result = null;

result = n1.add(n2); //n1和n2做加法运算
System.out.println("和:" + result.toString());

result = n1.subtract(n2); //n1和n2做减法运算
System.out.println("差:" + result.toString());

result = n1.multiply(n2); //n1和n2做乘法运算
System.out.println("积:" + result.toString());

result = n1.divide(n2); //n1和n2做除法运算
System.out.println("商:" + result.toString());

BigInteger m = new BigInteger("1968957"),
COUNT = new BigInteger("0"),
ONE = new BigInteger("1"),
TWO = new BigInteger("2");
System.out.println(m.toString() + "的因子有:");
for (BigInteger i = TWO; i.compareTo(m) < 0; i = i.add(ONE)) {
if ((m.remainder(i).compareTo(BigInteger.ZERO)) == 0) {
COUNT = COUNT.add(ONE);
System.out.print(" " + i.toString());
}
}
System.out.println("");
System.out.println(m.toString() + "一共有" + COUNT.toString() + "个因子");
}
}