JAVA中面向对象中类的问题

public class Point {
private Integer pointX;
private Integer PointY;

public void display() {
    System.out.println(String.format("X轴坐标:%1$d Y轴坐标:%2$d",getPointX(),getPointY()));
}

public Integer getPointX() {
    return pointX;
}

public void setPointX(Integer pointX) {
    this.pointX = pointX;
}

public Integer getPointY() {
    return PointY;
}

public void setPointY(Integer pointY) {
    PointY = pointY;
}

}