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public class Test {
public static void main(String[] args) {
int result = 1;
for (int i = 1; i <= 100; i++) {
result *= i;
}
System.out.println(result);
}
}
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¶þ.ʹÓÃBigInteger´óÈÝÁ¿ÔËËãÀà
import java.math.BigInteger;
public class Test {
public static void main(String[] args) {
BigInteger result = new BigInteger("1");//Ϊresult¸³³õʼֵ£¬Îª1
for (int i = 1; i <= 100; i++) {
BigInteger num = new BigInteger(String.valueOf(i));
result = result.multiply(num);//µ÷ÓÃ×Գ˷½·¨
}
System.out.println(result);//Êä³ö½á¹û
System.out.println(String.valueOf(result).length());//Êä³ö³¤¶È
}
}
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 public class StringUtil
{
public static String convertToStringWithTrim(Object object)
{
if(null == object)
{
return null;
}

String returnStr = (String)object;

return Trim(returnStr);
}
public static String Trim(String str)
{
if(IsEmpty(str))
{
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(3)±àÒë´úÂë  compiler code
(4)ÔËÐгÌÐò  run program
µÚÒ»¸ö³ÌÐòÎļþHelloWorld.java
public class HelloWorld {
   public static void main(String[] args){
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