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public class Point {
private float x , y ;
public Point() { this.x = this.y = 0 ;}
public Point(float a , float b) { this.x = a ; this.y = b;}
public void setX(float a) {this.x = a;}
public void setY(float a) {this.y = a;}
public float getX() {return this.x ;}
public float getY() {return this.y ;}
}