class Line {
  private int x1, y1, x2, y2;
  Line(int x1, int y1, int x2, int y2) {
    this.x1 = x1;
    this.y1 = y1;
    this.x2 = x2;
    this.y2 = y2;
  }
  public String toString() {
    return ("(" + x1 + ", " + 
                     y1 + "):(" +
                     x2 + ", " + 
                     y2 + ")" );
  }
  void translate(int dx, int dy) {
    x1 = x1 + dx;
    y1 = y1 + dy;
    x2 = x2 + dx;
    y2 = y2 + dy;
  }
  double length() {
    int dx = x1 - x2;
    int dy = y1 - y2;
    return Math.sqrt(dx * dx + dy * dy);
  }
}

class LineTest {
  public static void main(String[] args) {
    Line line1 = new Line(10,20,50,100);
    Line line2 = new Line(25,33,99,100);
    System.out.print("Line1: " + line1);
    System.out.println(", length = " + line1.length());
    System.out.print("Line2: " + line2);
    System.out.println(", length = " + line2.length());
    line1.translate(100, 200);
    System.out.print("Line1: " + line1);
    System.out.println(", length = " + line1.length());
  }
}