java 程序错误原因

class Point {
private double x;
private double y;
Point(double x1, double y1) {
x = x1;
y = y1;
}
public double getx() { return x; }
public double gety() { return y; }
public void setX(double i) { x = i; }
public void setY(double i) { y = i; }
}

class Circle {
private Point o;
private double radius;
Circle(Point p, double r) {
o = p;
radius = r;
}
Circle(double r) {
o = new Point(0.0, 0.0);
radius = r;
}

boolean contains(Point p) {
double x = p.getX() - o.getX();
double y = p.getY() - o.getY();
if(x*x + y*y > radius * radius) return false;
else return true;
}

public void setO(double x, double y) {
o.setX(x);
o.setY(y);
}
public Point getO()

//全是大小写的问题
class Point {
private double x;

private double y;

Point(double x1, double y1) {
x = x1;
y = y1;
}

public double getX() {
return x;
}

public double getY() {
return y;
}

public void setX(double i) {
x = i;
}

public void setY(double i) {
y = i;
}
}

class Circle {
private Point o;

private double radius;

Circle(Point p, double r) {
o = p;
radius = r;
}

Circle(double r) {
o = new Point(0.0, 0.0);
radius = r;
}

boolean contains(Point p) {
double x = p.getX() - o.getX();
double y = p.getY() - o.getY();
if (x * x + y * y > radius * radius)
return false;
else
return true;
}

public void setO(double x, double y) {
o.setX(x);
o.setY(y);
}