在Java中不使用类型（类名）创建新实例

Question

我找到了此代码。现在我很困惑，origin = new Point(0, 0);是什么意思。如果是实例化/对象创建，则其类型（类名）在其前面。如果是分配，为什么要使用new。

public class Rectangle {
    public int width = 0;
    public int height = 0;
    public Point origin;

    //Four constructors
    public Rectangle() {
        origin = new Point(0, 0);
    }

    public Rectangle(Point p) {
        origin = p;
    }

    public Rectangle(int w, int h) {
        this(new Point(0, 0), w, h);
    }

    public Rectangle(Point p, int w, int h) {
        origin = p;
        width = w;
        height = h;
    }

    //A method for moving the rectangle
    public void move(int x, int y) {
        origin.x = x;
        origin.y = y;
    }

    //A method for computing the area of the rectangle
    public int area() {
        return width * height;
    }
}

Answer 1

Point是变量的类型。它基本上存储两个值（x和y）。这就是简单的解释。

origin =新Point（0，0）设置变量原点的值