A randomly selected students to answer questions

| - Demand: In a small class, of all people, randomly selected person to answer a question

 

| - realization of ideas:

1, all students enter the name of an array

2, write a statement that generates random integer

3, let the random integer where the name of the act as an array index, and outputs a corresponding name

 

Code content:

the Try Package; 

Import java.util.Scanner; 

/ ** 
* @auther Zhou Xiaolong :: 
* @Description: a random name 
* @program: Xunhuan 
* @Create: 2019-07-03 14:59 
* / 
public class {the Random 
    Scanner Scanner SC = new new static (the System.in); 
    public static void main (String [] args) { 
        // definition array, storing names 
        // Si may Hsuan Meng Xuan Lan Lan Zeng Tao Beecham Xiaotian Lin Peng Dajiuhu with a view dragons 
        String [] names = { "nine lakes", "Jenny," "can Xuan", "Da Xuan", "Meng thinking", "Lan Lan", "Zeng Tao," "will become", "laugh day "," Lin Peng "," order "," dragons "," the first floor of Heaven "}; 
        System.out.println (" Please press 0 a random draw students to answer questions "); 
        // set to receive a keyboard variable information 
        int key = sc.nextInt ();
        the while (Key == 0) { 
// System.out.println ( "start random named ******* ********");
            // set a 0 
            int Random = (int) (Math.random () * 13-1); 
            for (int I = 0; I <of names.length; I ++) { 
                IF (Random == I) { 
                    the System.out .println ( "Please ---" + names [i] + "--- answered questions"); 
                    BREAK; 
                } 

            } 
// System.out.println ( "\ n-\ n-start random ******* named ******** "); 
            System.out.println (" \ the n-\ 0 the n-click a random draw students to answer questions "); 
            Key = sc.nextInt (); 
        } 
    } 
} 


| - operation result