1) A method to generate a list of integer values between 0 and 99(inclusive). Me

Question

1) A method to generate a list of integer values between 0 and 99(inclusive).
Method signature:
public static int[] generateList(int size) // size is length of the array

2) A method to print the list.
Method signature:
public static void printArray(int[] list, int numberPerLine)

3)A method to create a histogram of the values in list. The method should create the histogram based on the following range:
0-9
10-19
20-29
30-39
40-49
50-59
60-69
70-79
80-89
90-99
Method header is:
Public static int[] histogram(int[] list)

4) A method to print the histogram graph (*=10)

5) Write a main method to generate a list of 100 values. Print the list (10 values per line). Print the histogram graph.

6) Modify main method to generate a list of 1000 values. Print the histogram graph.

Explanation / Answer

please rate -thanks

1* = 10 numbers what about 11 numbers or 12 numbers--how many starts? I rounded 11 to 2 starts etc

import java.util.*;
public class histogram
{
public static void main(String[] args)
    { int i, n,intervals=10;
        n=1000;                            //number of numbers to generate
        int[]numbers=new int[n];
      numbers =generateList( n);
        int[] hist=new int[intervals];
        hist=histogram(numbers);
        drawhist(intervals,hist);
                  }
public static void printArray(int[] numbers,int line)
        {System.out.println("Numbers generated");
        for(int i=0;i<numbers.length;i++)
        { System.out.print(numbers[i]+" ");
        if((i+1)%line==0)
              System.out.println();
                }
        }       
public static void drawhist(int intervals, int hist[])
{int i,j;
System.out.println(" Histogram ---------------------------");
for(i=0;i<intervals;i++)
    {System.out.print(i*10+"-"+(i*10+9)+" | ");
    int stars=hist[i]%10;
         if(stars>0)
              stars=1;
    for(j=0;j<hist[i]/10+stars;j++)
         System.out.print("*");
    System.out.println();
    }
}   

public static int[] histogram(int numbers[])
{int i;
int[] h=new int[10];
for(i=0;i<10;i++)
       h[i]=0;
for(i=0;i<numbers.length;i++)
     if(numbers[i]>=90)
          h[9]++;
    else if(numbers[i]>=80)
          h[8]++;
        else if(numbers[i]>=70)
          h[7]++;
      else if(numbers[i]>=60)
          h[6]++;
        else if(numbers[i]>=50)
            h[5]++;
        else if(numbers[i]>=40)
            h[4]++;
        else if(numbers[i]>=30)
            h[3]++;
       else if(numbers[i]>=20)
            h[2]++;
      else if(numbers[i]>=10)
            h[1]++;
      else
            h[0]++;
   
return h;

}   
public static int[] generateList(int size) // size is length of the array   { Random generator = new Random();
    {int i;
    Random generator=new Random();
    int[]numbers=new int[size];
    for(i=0;i<size;i++)
         numbers[i]=generator.nextInt(100 );
    return numbers;
}
   
}

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