什么<<在java中意思？ [英] What does << mean in java?

问题描述

我找不到什么<<在java中意味着，因为我无法在Google上搜索它，我绝对迷失了！

I can't find out what << means in java, because I can't search for it on Google I am absolutely lost!

有问题的代码是：

public int getRGB() {
    return ((red << 16) | (green << 8) | blue);
}

取自 http://java.sun.com/docs/books/tutorial/essential/concurrency/example/ImmutableRGB.java

非常感谢有人告诉我，谢谢！

Would really appreciate someone telling me, thanks!

推荐答案

位的左移

如果红色== 4（二进制为：00000100），则红色<< 16将在其右侧插入16个0位，产生：000001000000000000000000，其为小数262144

If red == 4 (which in binary is: 00000100) then red << 16 will insert sixteen 0-bits at its right, yielding: 000001000000000000000000 which is 262144 in decimal

这篇关于什么&lt;&lt;在java中意思？的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！