Question

You will have to write one method in the GradeHistogram class

• The method should be called printDataRow
• It has two formal parameters
  A string for the row label
  An int for how many asterisks are in the row
• The method will print
  The string that was passed in followed by a colon and a space
  The asterisks (*)
  After the last asterisk it will print a newline
  Example: the statement: printDataRow("Number of As", 7); would output the following Number of As: *******
• The class GradeHistogram is:
  • public class GradeHistogram
    {
    private String className;
    private int numAs;
    private int numBs;
    private int numCs;
    private int numDs;
    private int numFs;
      
    public GradeHistogram(String className, int numAs, int numBs, int numCs,int numDs, int numFs)
    {
    this.className = className;
    this.numAs = numAs;
    this.numBs = numBs;
    this.numCs = numCs;
    this.numDs = numDs;
    this.numFs = numFs;
    }
      
    public void setClassName(String name)
    {
    className = name;
    }
    public void setNumAs(int num)
    {
    numAs = num;
    }
    public void setNumBs(int num)
    {
    numBs = num;
    }
    public void setNumCs(int num)
    {
    numCs = num;
    }
    public void setNumDs(int num)
    {
    numDs = num;
    }
    public void setNumFs(int num)
    {
    numFs = num;
    }
      
    public String getClassName()
    {
    return className;
    }
    public int getNumAs()
    {
    return numAs;
    }
    public int getNumBs()
    {
    return numBs;
    }
    public int getNumCs()
    {
    return numCs;
    }
    public int getNumDs()
    {
    return numDs;
    }
    public int getNumFs()
    {
    return numFs;
    }
      
    public void printDataRow(String rowLabel, int numAst)
    {
    //answer goes here
    }
      
    public void printChart()
    {
    System.out.println("Class Name: " + className);
    printDataRow("Number of As", numAs);
    printDataRow("Number of Bs", numBs);
    printDataRow("Number of Cs", numCs);
    printDataRow("Number of Ds", numDs);
    printDataRow("NUmber of Fs", numFs);
      
    }
      
    }

Answer 1

The Code:

public class GradeHistogram
{
private String className;
private int numAs;
private int numBs;
private int numCs;
private int numDs;
private int numFs;

public GradeHistogram(String className, int numAs, int numBs, int numCs,int numDs, int numFs)
{
this.className = className;
this.numAs = numAs;
this.numBs = numBs;
this.numCs = numCs;
this.numDs = numDs;
this.numFs = numFs;
}

public void setClassName(String name)
{
className = name;
}
public void setNumAs(int num)
{
numAs = num;
}
public void setNumBs(int num)
{
numBs = num;
}
public void setNumCs(int num)
{
numCs = num;
}
public void setNumDs(int num)
{
numDs = num;
}
public void setNumFs(int num)
{
numFs = num;
}

public String getClassName()
{
return className;
}
public int getNumAs()
{
return numAs;
}
public int getNumBs()
{
return numBs;
}
public int getNumCs()
{
return numCs;
}
public int getNumDs()
{
return numDs;
}
public int getNumFs()
{
return numFs;
}

public void printDataRow(String rowLabel, int numAst)
{
   //printing the string first
   System.out.print(rowLabel+": ");
   //simple for loop to print the asterisks
   for(int i=1;i<=numAst;i++){
       System.out.print("*");
   }
   //new line character after all the asterisks
   System.out.println();
}

public void printChart()
{
System.out.println("Class Name: " + className);
printDataRow("Number of As", numAs);
printDataRow("Number of Bs", numBs);
printDataRow("Number of Cs", numCs);
printDataRow("Number of Ds", numDs);
printDataRow("NUmber of Fs", numFs);

}
//main method has been added to test the functions
public static void main(String args[]) {
   //Creating object to call the method printChart()
   GradeHistogram ob = new GradeHistogram("CheggIs<3",1,2,3,4,5);
   ob.printChart();
}
}

Console Output: