java 用float和double指数记数法所能表示的最大和最小的数字

public class MaxMinFloatDouble {  
      
    /** 
     * @param args 
     */ 
    public static void main(String[] args) {  
        // TODO Auto-generated method stub  
        float fmax = Float.MAX_VALUE;  
        float fmin = Float.MIN_VALUE;  
        double dmax = Double.MAX_VALUE;  
        double dmin = Double.MIN_VALUE;  
          
        System.out.println(fmax);  
        System.out.println(fmin);  
        System.out.println(dmax);  
        System.out.println(dmin);  
          
        /*result: 
        3.4028235E38 
        1.4E-45 
        1.7976931348623157E308 
        4.9E-324*/ 
    }  
}