Java

<code>package Function;
/**
 * This interface defines a function
 * @author
 */

public interface Function {
/**
 * The smallest difference between two values
 * which is used to check and see if the difference
 * equals zero
 */
    public static double EPSILON = 0.000000001;  // nano
/**
 * Returns the range value for this function given
 * the domain value <code>inValue</code>
 * @param inValue
 * @return
 */
    public double getValue( double inValue );

}

package Function;<br />
/**<br />
 * This interface defines a function<br />
 * @ <br />
 */<br />
<br />
public interface Function {<br />
/**<br />
 * The smallest difference between two values<br />
 * which is used to check and see if the difference<br />
 * equals zero<br />
 */<br />
    public static double EPSILON = 0.000000001;  // nano<br />
/**<br />
 * Returns the range value for this function given<br />
 * the domain value <code>inValue</code><br />
 * @param inValue<br />
 * @return<br />
 */<br />
    public double getValue( double inValue );<br />
<br />
}

<code>/*
 *
 *
 * To change this template, choose Tools | Template Manager
 * and open the template in the editor.
 */

package Function;

/**
 *
 * @author 
 */
public class Main {
    
    /** Creates a new instance of Main */
    public Main() {
    }
    
    /**
     *
     * @param args
     */
    public static void main(String[] args) {
        //three constrctors are called through f, g, andh//
      Function f = new LinearFunction();
      Function g = new LinearFunction(2);
      Function h = new LinearFunction(3, 6);
      
     f.getYIntercept(1.0); 
             
      System.out.println("Y intercept="+f.getSlope());

      System.out.println("Slope="+f.setSlope());

        f.setSlope(2.0);

        

        

      for (int i = 0 ; i<10; i++ ){
          
        System.out.print("f(" +i+ ")="+f.getValue(i)+ "    ");
        System.out.print("g(" +i+ ")="+g.getValue(i)+ "    ");
        System.out.println("h(" +i+ ")="+h.getValue(i)+ "    ");
        
     
      }
      
    
      System.out.println();
    
}
}