问题

我有一小段设置颜色的函数代码，看起来像这样：

private Color color = Color.CYAN;

public void setColor(Color c) {
    color = c != null ? c : color;
    repaint();
}

这是不是意味着类似于这样？

color = c;
if (c != null) {
    color = c;
} else {
    c = color;
}

我真的无法理解这段代码。请给我一些启示。

英文:

I have a small piece of code of a function to set color that looks like this:

private Color color = Color.CYAN;

public void setColor(Color c) {
		color = c != null ?c :color;
		repaint();
	}

Does it means something like this?

color = c;
if (c != null) {
        color = c;
        } else {
        c = color;
}

I can't really wrap my head around this piece of code. Please enlighten me.

答案1

得分: 2

这更像是

if (c != null) {
    color = c;
} else {
    color = color;
}

而这实际上因为 color = color; 本质上没有任何作用，所以等同于：

if (c != null) {
    color = c;
}

英文:

It's more like

if (c != null) {
    color = c;
} else {
    color = color;
}

which, in turn, because color = color; essentially does nothing, is the same as:

if (c != null) {
    color = c;
}

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