Question

Homework: Create a Class.... from scratch

Design , implement and test a class that can be used to hold information about a musical note. Test it with an appropriate driver program.

A Note is described by two fields: the value of the note and the length of the note.

A programmer should be able to set and retrieve the length of the note and the value of the note.

The length of a note may be a sixteenth note, eight note, quarter note, half note, or a whole note.

The note's value is specified by indicating how far the note lies above or below the A note that orchestras use in tuning (A4 ). In counting "how far", you should include both the white and black notes on a piano.

The default constructor should set a note to the A above middle C (value = 0) and a length of a quarter note. Include methods to set a note to a specified length and value. Write methods to retrieve information about a note, including methods to:

1. tell you the letter name of the note (A, B , C);

2. tell you whether the note is natural or sharp (ie. white or black on the piano), and

3. tell you the frequency of the note in hertz. [[ HINT:  To calculate the frequency, use the formual 440 x 2^(n/12) where n is the note number. ]]

Feel free to include other useful methods ! No GUI interface or applet is required but the problem might extend itself to a cute applet in some way... You are encouraged to explore !

Answer 1

Solution:

code:

public class Note
{
private int length;
private int value;
public Note(int len, int val)
{
length = len;
value = val;
}
public int getLength() {
   return length;
}
public void setLength(int length) {
   this.length = length;
}
public int getValue() {
   return value;
}
public void setValue(int value) {
   this.value = value;
}
public double getFrequency (int n)
{
return (440 * 2^(n/12));
}
public char letterName(char a1, char a2, char a3)
{
   return a1;
}

}

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