Question

1 Write a Java method that takes an integer, n, as input and returns a reference to an array of n random doubles between 100.0 and 200.0. Just write the method.

2. You have a class A:

public class A

{

int i, double d;

public A(double d)

{

this.d=d;

this.i=10;

}

}

Answer 1

import java.io.*;

public class A
{

int i;
double d;
public A(double d)
{
this.d=d;
this.i=10;
}
public double[] random(int n)
{
double min=100,max=200;
double []res=new double[n];
//initilaize n values to array
for(int j=0;j<n;j++)
{
//if you need to round off to two decimal places use this
// Math.round(a * 100.0) / 100.0; a should be R.H.s of below statement and 100 is for 2 decimals(2 zero's)
res[j]=Math.random()*(max-min+1)+min;
}
return res;
}
   public static void main(String[] args) {
       Main m=new Main(200);
       double []res=m.random(10);
       for(int j=0;j<10;j++)
       {
       System.out.print(res[j]+" ");
       }
      
   }
}

I don't know why the constructor is present and i,d are declared but i gave the method for it

comment if any doubts