Java打印出所有的水仙花数的实现代码

public class exp2{  public static void main(String args[]){    int i=0;    math mymath = new math();    for(i=100;i<=999;i++)      if(mymath.shuixianhua(i)==true)      System.out.println(i);  }}class math{  public int f(int x)  {    if(x==1 || x==2)      return 1;    else      return f(x-1)+f(x-2);  }  public boolean iszhishu(int x)  {    for(int i=2;i<=x/2;i++)      if (x % 2==0 )       return false;    return true;  }  public boolean shuixianhua(int x)  {    int i=0,j=0,k=0;    i=x / 100;    j=(x % 100) /10;    k=x % 10;    if(x==i*i*i+j*j*j+k*k*k)     return true;    else     return false;     }}