Thread: Eclipse not recognizing my method for class.

I am using Eclipse IDE. I have created a class called LineSegment. I have to implement this class in my program I am writing called LineSegmentTesterApp.
However, when trying to use the accessor method getX1, getX2, getY1, etc... I get an error saying that the method is undefined. I think I may be looking over something. Thanks in advance for th help. P.s. my first time having to create and implement my own class.

package linesegmentapp;
 
/**
 * File: LineSegment.java
 * @author Jarrod Rotolo
 * Purpose: This class describes a line segment
 * Date: March 6, 2012
 * Course: CSC 1350
 */
 
public class LineSegment 
{
    /**
     * The X coordinate of the start point of the line segment.
     */
    private double x1;
 
    /**
     * The X coordinate of the end point of the line segment.
     */
    private double x2;
 
    /**
     * The Y coordinate of the start point of the line segment.
     */
    private double y1;
 
    /**
     * The Y coordinate of the end point of the line segment.
     */
    private double y2;
 
    /**
     * Constructs and initializes a Line with coordinates (0,0)->(0,0).
     */
    public LineSegment()
    {
        x1 = 0;
        y1 = 0;
        x2 = 0;
        y2 = 0;
    }
 
    /**
     * Constructs and initializes a Line2D from the specified coordinates.
     * @param x1Val - the X coordinate of the start point
     * @param y1Val - the Y coordinate of the start point
     * @param x2Val - the X coordinate of the end point
     * @param y2Val - the Y coordinate of the end point
     */
    public LineSegment(double x1Val, double y1Val, double x2Val, double y2Val) 
    {
        x1 = x1Val;
        y1 = y1Val;
        x2 = x2Val;
        y2 = y2Val;           
    }
 
    /**
     * Returns the X coordinate of the start point in double precision.
     * @return the X coordinate of the start point in double precision.
     */
    public double getX1() 
    {
        return x1;
    }
 
    /**
     * Returns the X coordinate of the end point in double precision.
     * @return the X coordinate of the end point in double precision.
     */
    public double getX2() 
    {
        return x2;
    }
 
    /**
     * Returns the Y coordinate of the start point in double precision.
     * @return the Y coordinate of the start point in double precision.
     */
    public double getY1() 
    {
        return y1;
    }
 
    /**
     * Returns the Y coordinate of the end point in double precision.
     * @return the Y coordinate of the end point tin double precision.
     */
    public double getY2() 
    {
        return y2;
    }
 
    /**
     * Computes the length of this line segment.
     * @return the length of this line segment
     */
    public double length() 
    {
         return Math.sqrt((x2-x1)+(y2-y1));
    }
 
    /**
     * Sets the location of the end points of this Line2D to the specified double coordinates.
     */
    public void setLine(double x1Val, double y1Val, double x2Val, double y2Val) 
    {
        x1 = x1Val;
        y1 = y1Val;
        x2 = x2Val;
        y2 = y2Val;
    }                
}

package linesegmentapp;
 
/**
 * File: LineSegmentTester.java
 * @author Jarrod Rotolo
 * Purpose: This program creates a triangle using the implemented class LineSegment
 * Date: March 6, 2012
 * Course: CSC 1350
 */
 
import java.util.*;
import linesegmentapp.LineSegment;
 
 
 
public class LineSegmentTester 
{
    public static void main(String[] args) 
    {
    	double x1, x2, x3;
    	double y1, y2, y3;
 
        Scanner keyb = new Scanner(System.in);
        System.out.println("Enter the x- and y- coordinates of the first point> ");
        x1 = keyb.nextDouble();
        y1 = keyb.nextDouble();
        System.out.println("Enter the x- and y- coordinates of the second point> ");
        x2 = keyb.nextDouble();
        y2 = keyb.nextDouble();
        System.out.println("Enter the x- and y- coordinates of the third point> ");
        x3 = keyb.nextDouble();
        y3 = keyb.nextDouble();
 
        LineSegment line1 = new LineSegment(x1,y1,x2,y2);
        LineSegment line2 = new LineSegment(x2,y2,x3,y3);
        LineSegment line3 = new LineSegment(x3,y3,x1,y1);
 
        System.out.println("The sides of the triangle are");
        System.out.println("line 1:[("+getX1()+","+getY1()+")->("+getX2()+","+getY2()+")]");
        System.out.println("line 2:[("+getX2()+","+getY2()+")->("+getX3()+","+getY3()+")]");
        System.out.println("line 3:[("+getX3()+","+getY3()+")->("+getX1()+","+getY1()+")]");
 
        double perimeter = line1.length() + line2.length() + line3.length();
        double s = perimeter/2;
        double area = Math.sqrt(s*(s-line1.length())*(s-line2.length())*(s-line3.length()));
 
 
 
 
 
 
 
 
    }
}

Ah that makes sense. So I can probably get rid of the x3 y3 variables since each object will have its own coordinates [(x1,y1),(x2,y2)]

Also, make comments with // it's much cleaner

Unless you're writing a lot like method descriptions and class descriptions, but not necessary for instance fields.