JAVA API ----- System class

java.util.Random Import; 

public class the Test { 
    public static void main (String [] args) { 



       // function_1 (); 
        function_2 (); 



    } 

    / ** 
     * The arraycopy (source array name, a starting source array to be copied element position, the target array name, starting position of the destination array element is stored, the number of elements to be copied) 
     * 
     * the first three elements of the array src, dest copied to the first three positions on the array 
     * before copying element: src array element [1,2,3,4,5], dest array element [6,7,8,9,10] 
     * after copying element: src array element [1,2,3,4,5], dest [ 1,2,3,9,10] 
     * / 
    public static void function_1 () { 
        int [] = {1,2,3,4,5} the src; 
        int [] dest = {6,7, 8,9, } 10; 

        System.arraycopy (the src, 0, dest, 0,3); // copy source array used to implement the portion of the target element to a specified position array 
        for (int i = 0; i <dest.length; i ++) {
            System.out.println (dest [I]); 
        } 
    }

    / ** 
     * 100-999 cycles generated between three digits and the number of prints, when the number of things can be divisible by 10, the end of the run the program 
     * / 

    public static void function_2 () { 
        the Random Random new new = the Random () ; 

        the while (to true) { 
            int NUM = random.nextInt (900) +100; 
            System.out.println (NUM); 
IF (NUM% 10 == 0) { 
    System.exit (0); 
} 
    } 
} 
}