Hands on the Brain (ii)

One

Full "handwritten code implementation" random number generation

Example: generating 20 random numbers in a range 0~1000

1  Packagegenerate random numbers;2  Public classSuiji {3     Private Static Final intN = 20;//number of random numbers generated4     Private Static Final intleft = 0;//generate a left range of random numbers5     Private Static Final intright = 1000;//generate the right range of random numbers6     Private Static Longx0 = 1L;7     Private LongA = 1234567890L;8     Private Longc = 12345L;9     Private Longm = 2345678912L; Ten     //Generate random numbers One     Private LongRAND (LongR) A     { -     //A,c,m is constant -R = (R * A + C)% m;//xn+1= (aXn + c) mod m the         returnR; -     }      -     Private LongLittle (intLintRLongRand) {         -         returnL + rand% (R-l + 1 ); +     } -     intJishu=1; +     Private voidRecursion (intCountLongRand) {         A         if(Count >=N) { at             return; -         } -Rand =rand (RAND); -         LongR =Little (left, right, Rand);  -System.out.print (R + "");  -Recursion (+ +)count, Rand); in     } -      Public Static voidMain (string[] args) { toSuiji A =NewSuiji (); +A.recursion (0, x0); -     } the}

Operation Result:

Two, method overloading

I found that functions of the same name can be overloaded to implement different types of operations.

Two or more methods that meet the following conditions can form an "overloaded" relationship:

(1) The method name is the same;

(2) The parameter types are different, the number of parameters is different, or the order of the parameter types is different.

Note: The return value of the method cannot be used as a criterion for method overloading.

Hands on the Brain (ii)