Media: Graphics, Audio,Video - Java - page 500

Program: Grapher

Grapher is a simple program that reads a table of numbers and graphs them. The input
format is two or more lines that each contain an X and a Y value. The output is an onscreen
display that can also be printed. Figure 12-7 shows the results of running it with the follow-
ing simple data; the first column is the X coordinate and the second is the Y coordinate of
each point. The program scales the data to fit the window:

1.5 5
1.7 6
1.8 8
2.2 7

Figure 12-7. Grapher in action

Example 12-13 shows the code.

Example 12-13. Grapher.java
public public class class Grapher Grapher extends extends JPanel {

private private static static final final long long serialVersionUID = - 1813143391310613248L ;

/** Multiplier for range to allow room for a border */
public

public final final static static double double BORDERFACTOR = 1.1f ;

/** The list of Point points. */
protected

protected List < Point2D > data ;

/** The minimum and maximum X values */
protected protected double double minx = Integer . MAX_VALUE , maxx = Integer . MIN_VALUE ;