test.java

来自「Java the UML Way 书中所有源码」· Java 代码 · 共 21 行

 class test
 {
	 public static void main(String[] args);
	 public int nextInt(int n) {
     if (n<=0)
                throw new IllegalArgumentException("n must be positive");

     if ((n & -n) == n)  // i.e., n is a power of 2
         return (int)((n * (long)next(31)) >> 31);

     int bits, val;
     do {
         bits = next(31);
         val = bits % n;
     } while(bits - val + (n-1) < 0);
     return val;
	 System.out.println("the random number is n:" + n);

 }