学步园

转载自：http://hi.baidu.com/hgaha163/blog/item/df4c368f7b9f6ceaf11f3607.html

import java.util.*;
import javax.swing.*;

public class Fudianshu {
   public static void main(String args[]){
      String k = JOptionPane.showInputDialog("请输入你的浮点数！");
      double x = Double.parseDouble(k);
      System.out.println("你输入的浮点数是："+x);
      int m = (int)x;
      double y = x - m;
      System.out.println("整数部分："+m);
      System.out.println("小数部分:"+y);
      System.exit(0);
   }
}