Question

我正在尝试运行一个类，该类根据从随机变量生成器类获得的数据执行计算。我想要的是在任何给定时间生成3个随机变量，然后在不生成另一组随机变量的情况下执行该类中的所有计算。一旦完成所有计算，就可以生成一组新的随机变量。 Computation类如下所示：

 public class Computation {



   public int meltTemp;
 //public void mTemp;
  public int mouldTemp;
public int setTemp;
public int Q;
public int volume;
public double Cp;
public int actualMouldTemp;
public double dT;
public int AMT ;//= Math.abs(dT);
public double mTemp;


  public Hashtable catalogue1;


   protected void setup() {
   //create Hashtable
   catalogue1 = new Hashtable();

    }



public double getAnswer() {


        int rand1[] = new int[3];
        int input [] = new int [2];

        ControlGUI par = new ControlGUI ();
        //input = ControlGUI.getArray();
        //catalogue am = new catalogue();



        RandomVariableGenerator var = new RandomVariableGenerator();
        rand1 = RandomVariableGenerator.getRand();
        //int rand[] = Arrays.copyOf(rand1, rand1.length);  

        meltTemp = 245;

        System.out.println("Melt Temp is  : "+ meltTemp);


        actualMouldTemp = (int)  ((0 - 51.4)+(0.302 * meltTemp) +(1.64 * rand1[0])+(0.201 * rand1[1]));

        System.out.println("The actual mould temperature is :" +actualMouldTemp + " Degrees celcius" );


        return actualMouldTemp;

 }



  public int getDiff(){

     Computation amg = new Computation();


   double  result[] = new double [4]; {

     setTemp = 55;
     dT = (actualMouldTemp - setTemp);
     AMT = (int) Math.abs(dT);

     System.out.println("The temperature difference is : "+ AMT);

     return AMT;
     }
      }

尝试使用生成的变量的下一个方法是getHeatingTime1（），它需要坦克卷的rand1 [2]：

  public double getHeatingTime1(){

   Computation jose = new Computation();

   int [] Results = new int [4];
   Results [0] = AMT;
   //Results [] = Computation.class;

   Q = 3; //heating in kW
   Cp = 4.2; //Specific heat capacity of water
   volume = 6; 

  //AMT = 
   System.out.println("AMT IS "+ Results [0]);
   long HT1 = (long) ((volume*Cp*Results [0])/Q);

   return HT1;

   }

  public double getHeatingTime2(){
 int Results [] = new int [4] ;   
   Computation cr7 = new Computation();
   //double dT = cr7.getDiff();

   Q = 9; //heating in kW
   Cp = 4.2; //Specific heat capacity of water
   volume = 6;
   //AMT = 7;
   System.out.println("AMT IS "+ Results [1]);
   long HT2 = (long) ((volume*Cp*Results [1])/Q);
   return HT2;
 }

public double getHeatingTime3(){
 int Results [] = new int [4];   
 //double AMT = getDiff();       
   Computation jt = new Computation();

   //double dT = jt.getDiff();
  // AMT = 7;
   Q = 18; //heating in kW
   Cp = 4.2; //Specific heat capacity of water
   volume = 6;
    System.out.println("AMT IS "+ Results [1]);
   long HT3 = (long) ((volume*Cp*Results [1])/Q);

   return HT3;
   }

   public double getCoolingTime(){
     // double CT = 0;  
    Computation nvh = new Computation();

    int rand1[] = new int[3];
    int rand[] = Arrays.copyOf(rand1, rand1.length);  
    //RandomVariableGenerator var = new RandomVariableGenerator();
   //rand1 = Computation;
     mouldTemp = 55;

       System.out.println("Rand 0 is "+ rand1[0]);
       System.out.println("Rand 1 is "+ rand1[1]);
       System.out.println("Rand 2 is "+ rand1[2]);

     double CT =  ((0.5/rand[2])*((mouldTemp - rand1[0])/(rand1[1] - mouldTemp)));
       double CTA = Math.abs(CT);
       return CTA;

   }
  }

随机变量生成器类如下所示：

  public class RandomVariableGenerator {

 public static int[] getRand (){
    int rand[] = new int [3];

    Random r = new Random ();
    int myRandomNumber = 0;
    //for (int i=0; i < 1 ; i++)
    myRandomNumber = r.nextInt(15) + 5;
    System.out.println("Chilled water temperature:" + myRandomNumber);
    rand[0] = myRandomNumber;

    Random rn = new Random ();
    int myNumber = 0;
    // (for int i=0; i < 1; i++)
    myNumber = rn.nextInt(25) + 50; 
    System.out.println("Heated water temperature:" + myNumber);
    rand[1]= myNumber;

    Random rm = new Random ();
    int myRandNumber = 0;
    // (for int i=0; i < 1; i++)
    myRandNumber = rm.nextInt(2) + 6; 
    System.out.println("Tank Volume:" + myRandNumber);
    rand[2]= myRandNumber;

     return rand;
 }    


}

Answer 1

你可以将所有3个随机变量设为私有和类，而不是函数。然后，当你需要一个新的集合时，调用一个重置它们的函数。

例如：

public class MyClass{
//replace these with the actual types/variables you need
int var1;
double var2;
double var3;    

/**
*Call this function when you need a new set of variables
**/
public void resetVariables(){
    //Change this to the random class you would prefer to use
    Random random = new Random(System.currentTimeMillis());
    var1 = random.nextInt();
    var2 = random.nextDouble();
    var3 = random.nextDouble();
}

//put your other functions here except remove the declarations for var1, var2, and var3
/*
    ex.
    public int myFunction(){
        Random random = new Random(System.currentTimeMillis());
        int var1 = random.nextInt();
        return var1 * 2;
    }

    becomes

    public int myFunction(){
        // use the global variable instead of the function's variable
        return var1 * 2;
    }
*/

}

Answer 2

声明一个实例int vector来保存对象（实例）级别的三个值（rndVars [3]）

public class Computation {

   public int meltTemp;
 //public void mTemp;
  public int mouldTemp;
public int setTemp;
public int Q;
public int volume;
public double Cp;
public int actualMouldTemp;
public double dT;
public int AMT ;//= Math.abs(dT);
public double mTemp;

private int [] rndVars = new int[3];

...

如果需要重置3个值，可以调用公共方法setRandomVars（）。

public void setRandomVars(){
    rndVars[0] = RandomVariableGenerator.getRand();
    rndVars[1] = RandomVariableGenerator.getRand();
    rndVars[2] = RandomVariableGenerator.getRand();
}

Computation类中的随机变量生成

2 个答案: