An example of a class Coordinate

Coordinate.java

import java.lang.Math; 
public class Coordinate {
  // attributes
  private Double x;
  private Double y;

  // constructor
  // defined how to create an instance of this class
  public Coordinate(Double x, Double y) {
    this.x = x;
    this.y = y;
  }
  
  // methods
  public Double getX() {
    return x;
  }

  public void setX(Double x) {
    this.x = x;
  }

  public Double getY() {
    return y;
  }

  public void setY(Double y) {
    this.y = y;
  }

  public Double distance(Coordinate coordinate){
    Double abscissas = Math.pow((this.x - coordinate.x), 2);
    Double ordinates = Math.pow((this.y - coordinate.y), 2);
    return Math.pow((abscissas + ordinates), 0.5);
  }
}