void函数中的return语句有什么用

2022-01-19 00:00:00 return android java

我是java新手，return;是什么意思?它像 break 吗?

I m new to java, what does return; mean? is it like break ? 

  public void run() {
            if(imageViewReused(photoToLoad))
                return;
            Bitmap bmp=getBitmap(photoToLoad.url);
            memoryCache.put(photoToLoad.url, bmp);
            if(imageViewReused(photoToLoad))
                return;
            BitmapDisplayer bd=new BitmapDisplayer(bmp, photoToLoad);
            Activity a=(Activity)photoToLoad.imageView.getContext();
            a.runOnUiThread(bd);
        }

如果第二个 imageViewReused(photoToLoad) 返回 true，则 BitmapDisplayer bd=new BitmapDisplayer(bmp, photoToLoad) 不会被执行，对吧?

if the second imageViewReused(photoToLoad) returns true, BitmapDisplayer bd=new BitmapDisplayer(bmp, photoToLoad) won't be executed, right?

推荐答案

return 语句跳过函数作用域的剩余执行.

Return statement skips the remaining execution of a function scope.

值得一读:

  1. 返回:http://docs.oracle.com/javase/tutorial/java/javaOO/returnvalue.html
  2. break :http://docs.oracle.com/javase/tutorial/java/坚果和螺栓/branch.html

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