求e^x的近似值

package com.test.common;

public class TestE {

  public static double getE(int x)
  {
    int ncount=1;
    int xcount=x;
    double count=1;
    
    int n=1;
    
    while(n<10)
    {
      ncount=ncount*n;
      xcount=xcount*x;
      count+=(double)xcount/(double)ncount;
      
      n++;
    }
    
    return count;
  }
  /**
   * @param args
   */
  public static void main(String[] args) {
    // TODO Auto-generated method stub
    System.out.println(getE(2));
  }

}