Cell.java

Below is the syntax highlighted version of Cell.java from §9.8 Data Analysis.

/******************************************************************************
 *  Compilation:  javac Cell.java
 *  Execution:    java Cell
 *  
 *
 ******************************************************************************/

public class Cell {
    private boolean spin;   // up (true) or down (false)

    public Cell(boolean spin) { 
        this.spin = spin;
    }

    // random spin - up with probability p
    public Cell(double p) { 
        spin = (Math.random() < p);
    }

    // flip the spin
    public void flip() { spin = !spin; }

    // +1 if up, -1 if down
    public double magnetization() {
        if (spin) return +1.0;
        else      return -1.0;
    }

    // draw cell according to value of spin
    public void draw(double x, double y) {
        if (spin) StdDraw.setPenColor(StdDraw.WHITE);
        else      StdDraw.setPenColor(StdDraw.BLUE);
        StdDraw.filledSquare(x, y, 1);
    }

    // string representation
    public String toString() {
        if (spin) return "+";
        else      return "-";
    }



    public static void main(String[] args) {
    }

}