Question

The first part is to implement one of the questions from your examination.

/*

A Range objects represents an integer range, such as

1-10 or 50701-50799. The lower and upper bounds of

a Range are given at the time the object is created.

*/

public interface Range {

    public boolean contains( int value );

    // returns true if v is ≥ lower bound and ≤ upper bound,

    // and false otherwise

    public boolean overlaps( Range other );

    // returns true if the receiver contains at least

    // one value in common with other, and false otherwise

    public int size();

    // returns the number of integers in the range

    public boolean isEquals( Range );

    // Returns if the passed in Range is equal to the range in the

    //class

}

public class PriceRange implements Range {

               // your implementations go here

}

write the code in java please and thank you

When you create your classes(es) you should create then under source directories:

            src/main/java

            src/test/java

Answer 1

package HomeworkLib;

interface Range
{
// int lowerLimit ;
   //int upperLimit ;

   public boolean contains( int value );

public boolean overlaps( Range other );

public int size();

// returns the number of integers in the range

public boolean isEquals( Range other );

// Returns if the passed in Range is equal to the range in the

//class
  
}
  
public class PriceRange implements Range {
  
  
int lowerLimit=0;
int upperLimit=0;
  
  
public PriceRange(int lowerLimit,int upperLimit)
{
this.lowerLimit=lowerLimit;
this.upperLimit=upperLimit;
  
  
}
  
  
  
public boolean contains( int value )
{
  
if(value>=lowerLimit&&value<=upperLimit)
return true;
else
return false;
}
// checks overlapping
public boolean overlaps( Range other )
  
  
{
  

PriceRange others=(PriceRange)other;

if((lowerLimit<=others.lowerLimit && upperLimit>=others.lowerLimit)||(lowerLimit<=others.upperLimit && upperLimit>=others.upperLimit))
return true;
else
return false;
}
  
// returns the number of integers in the range
public int size()
{
  
return upperLimit-lowerLimit+1;
  
}
// Returns if the passed in Range is equal to the range in the

//class
public boolean isEquals( Range other)
{
  
PriceRange others=(PriceRange)other;
if(others.lowerLimit==lowerLimit && others.upperLimit-lowerLimit==upperLimit-lowerLimit)
return true;
else
return false;
}
  
  
// test main method;
  
public static void main(String args[])
{
  
  
PriceRange r1=new PriceRange(2,5);
  
System.out.println(r1.contains(3));
System.out.println(r1.contains(9));
  
PriceRange r2=new PriceRange(3,10);
System.out.println(r1.overlaps(r2));
  
PriceRange r3=new PriceRange(20,30);
System.out.println(r1.overlaps(r3));
  
System.out.println(r1.size());
System.out.println(r1.isEquals(r2));
  
  
}

}

Sample Run:

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