問題描述

好的，所以我正在為一個 Java 類進行分配，其中一部分是確定一個點是否在矩形的尺寸范圍內.所以我創建了這段代碼:

ok, so i'm doing an assignment for a Java class and one part of the assignment is to find out if a point is within the dimensions of a rectangle. so I created this code:

public boolean contains(Point p) {
    return (this.getLocation().getX() < p.getX() && this.getLocation().getY() < p.getY() &&
            this.getLocation().getX() + this.getWidth() > p.getX()  &&
            this.getLocation().getY() + this.getHeight() > p.getY());
}

我也創建了一個 Point 類，這就是我要求 Point p 參數的原因.為了測試這個 boolean 我在我的 Main 類中創建了一個簡單的 if 語句:

I created a Point class as well, which is why I asked for a Point p parameter. To test this boolean I created a simple if statement in my Main class:

//check if one rectangle's point is inside another
if (rectangle.contains(rectangle2.getLocation()))
    System.out.println("the point is in the rectangle");

點的位置是(6,7).矩形 1 的點、寬和高分別為 (4,5)、9 和 3.我知道這一點在第一個矩形內，但是 println 語句沒有顯示，這意味著我創建的 boolean 肯定有問題，但我沒有'沒有看到錯誤，也許我的頭是多云的，但有人可以向我指出這里有什么問題嗎?

The location of the point is (6,7). The point, width, and height of rectangle 1 is (4,5), 9, and 3, respectively. I know for a fact that this point is inside the first rectangle, but the println statement is not showing, meaning there must be a problem with the boolean i created but I don't see an error, maybe my head is cloudy but can someone point out to me what's wrong here?

附:這都是控制臺工作，我不是在處理一些 GUI 或圖形編程.

P.S. this is all Console work, i'm not dealing with some GUI or graphics programming.

推薦答案

我覺得沒問題.我會檢查你的測試用例是否真的有你認為的數字；我還會檢查您的訪問器是否都返回了正確的值(我無法告訴您我將 getX() 實現為 {return this.y;} 的次數).除此之外，這是任何人的猜測.

It looks ok to me. I would check that your test case actually has the numbers you think it does; I would also check that your accessors are all returning the right values (I can't tell you the number of times I've implemented getX() as {return this.y;}). Other than that it's anyone's guess.

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