Need help with java. Need help with code in area where there are comments. publi
ID: 3561377 • Letter: N
Question
Need help with java. Need help with code in area where there are comments.
public class Counter
{
// PUT PRIVATE VARIABLES HERE
/**
* The default constructor for objects of class Counter. Minimum is 0 and the maximum
* is the largest possible integer.
*/
public Counter()
{
// ADD CODE FOR THE CONSTRUCTOR
}
/**
* The alternate constructor for objects of class Counter. The minimum and maximum values are given as parameters.
*/
public Counter(int min, int max)
{
// ADD CODE FOR THE ALTERNATE CONSTRUCTOR
}
/**
* Determine if two counters are in the same state
*
* @param otherObject the object to test against for equality
* @return true if the objects are in the same state
*/
public boolean equals(Object otherObject)
{
boolean result = true;
if (otherObject instanceof Counter)
{
Counter otherCounter = (Counter)otherObject;
}
return result;
}
/**
* Increases the counter by one. If after increase the Counter becomes bigger than the maximum value it should roll over to the min value.
*/
public void increase()
{
// ADD CODE TO INCREASE THE VALUE OF THE COUNTER.
}
/**
* Decreases the counter by one. If after decrease the Counter becomes less than the minimum value it should roll over to the max value.
*/
public void decrease()
{
// ADD CODE TO DECREASE THE VALUE OF THE COUNTER. If the
}
/**
* Get the value of the counter
*
* @return the current value of the counter
*/
public int value()
{
// CHANGE THE RETURN TO GIVE THE CURRENT VALUE OF THE COUNTER
return -50;
}
/**
* Accessor that allows the client to determine if the counter
* rolled over on the last count
*
* @return true if the counter rolled over
*/
public boolean rolledOver()
{
// CHANGE THE RETURN TO THE ROLLOVER STATUS OF THE COUNTER
return true;
}
/**
* Override the toString method to provide a more informative
* description of the counter
*
* @return a descriptive string about the object
*/
public String toString()
{
// CHANGE THE RETURN TO A DESCRIPTION OF THE COUNTER
return "";
}
}
Explanation / Answer
public class Counter
{
// PUT PRIVATE VARIABLES HERE
private int value;
private int min,max;
/**
* The default constructor for objects of class Counter. Minimum is 0 and the maximum
* is the largest possible integer.
*/
public Counter()
{
// ADD CODE FOR THE CONSTRUCTOR
min = 0;
max = Integer.MAX_VALUE;
value = 0;
}
/**
* The alternate constructor for objects of class Counter. The minimum and maximum values are given as parameters.
*/
public Counter(int min, int max)
{
// ADD CODE FOR THE ALTERNATE CONSTRUCTOR
this.min = min;
this.max = max;
value = min;
}
/**
* Determine if two counters are in the same state
*
* @param otherObject the object to test against for equality
* @return true if the objects are in the same state
*/
public boolean equals(Object otherObject)
{
boolean result = false;
if (otherObject instanceof Counter)
{
Counter otherCounter = (Counter)otherObject;
result = (this.value()==otherCounter.value());
}
return result;
}
/**
* Increases the counter by one. If after increase the Counter becomes bigger than the maximum value it should roll over to the min value.
*/
public void increase()
{
// ADD CODE TO INCREASE THE VALUE OF THE COUNTER.
value++;
if(value > max)
value = min;
}
/**
* Decreases the counter by one. If after decrease the Counter becomes less than the minimum value it should roll over to the max value.
*/
public void decrease()
{
// ADD CODE TO DECREASE THE VALUE OF THE COUNTER. If the
value--;
if(value>min)
value = max;
}
/**
* Get the value of the counter
*
* @return the current value of the counter
*/
public int value()
{
// CHANGE THE RETURN TO GIVE THE CURRENT VALUE OF THE COUNTER
return value;
}
/**
* Accessor that allows the client to determine if the counter
* rolled over on the last count
*
* @return true if the counter rolled over
*/
public boolean rolledOver()
{
// CHANGE THE RETURN TO THE ROLLOVER STATUS OF THE COUNTER
return (value==min || value == max);
}
/**
* Override the toString method to provide a more informative
* description of the counter
*
* @return a descriptive string about the object
*/
public String toString()
{
// CHANGE THE RETURN TO A DESCRIPTION OF THE COUNTER
return "";
}
}
public class TestCounter
{
public static void main(String[] args)
{
Counter C1 = new Counter();
C1.increase();
System.out.println("Counter1 value is "+C1.value());
Counter C2 = new Counter(3,7);
System.out.println("Counter2 value is "+C2.value());
C2.increase();
C2.increase();
C2.increase();
System.out.println("Counter2 value is "+C2.value());
System.out.println("is Counter2 rolled over ? "+ (C2.rolledOver()?"Yes":"No"));
C2.increase();
System.out.println("Counter2 value is "+C2.value());
System.out.println("is Counter2 rolled over ? "+ (C2.rolledOver()?"Yes":"No"));
C2.increase();
System.out.println("Counter2 value is "+C2.value());
}
}