Specifying Access Attributes : Access Control « Class Definition « Java Tutorial

1. Java Tutorial
2. Class Definition
3. Access Control

import static java.lang.Math.sqrt;

class Point {
  public Point(double xVal, double yVal) {
    x = xVal;
    y = yVal;
  }

  public Point(final Point aPoint) {
    x = aPoint.x;
    y = aPoint.y;
  }

  public void move(double xDelta, double yDelta) {
    x += xDelta;
    y += yDelta;
  }

  public double distance(final Point aPoint) {
    return sqrt((x - aPoint.x) * (x - aPoint.x) + (y - aPoint.y) * (y - aPoint.y));
  }

  public String toString() {
    return Double.toString(x) + ", " + y;
  }

  private double x;

  private double y;
}