Wu Yuxiong - born naturally develop common java class library study notes: Math and Random class

public  class MathDemo01 {
     public  static  void main (String args []) {
         // Math class methods are static methods, directly using the "class method names ()" call with the form 
        System.out.println ( "seek root: "+ the Math.sqrt (9.0 )); 
        System.out.println ( " seeking the maximum of two numbers: "+ Math.max (10,30 )); 
        System.out.println ( " find the minimum number of two value: "+ Math.min (10,30 )); 
        System.out.println ( " power of 2. 3: "Math.pow + (2,3 )); 
        System.out.println ( " rounded: "+ Math.round (33.6 )); 
    } 
};

import java.util.Random ;
public class RandomDemo01{
    public static void main(String args[]){
        Random r = new Random() ;        // 实例化Random对象
        for(int i=0;i<10;i++){
            System.out.print(r.nextInt(100) + "\t") ;
        }
    }
};