2<<3=?

   public static void main(String[] args) {
        // TODO Auto-generated method stub
        System.out.println("16>>3="+(16>>3));
        System.out.println("2<<3="+(2<<3));
    }

Output:

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.csharpcode .preproc { color: #cc6633; }
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16>>3=2
2<<3=16

这三个是Java的移位操作符
<< 表示带符号左移: 左移几  就是乘以  2的几次方    左移三位 就是  乘以8
>> 表示带符号右移: 右移几  就是除以  2的几次方   右移三位 就是  除以8 
>>>表示无符号右移

2<<3 = 16
计算方法如下
2 的二进制是 00000010 然后向左移3位后得到 00010000  再转换为十进制是 16

.csharpcode, .csharpcode pre
{
font-size: small;
color: black;
font-family: consolas, "Courier New", courier, monospace;
background-color: #ffffff;
/*white-space: pre;*/
}
.csharpcode pre { margin: 0em; }
.csharpcode .rem { color: #008000; }
.csharpcode .kwrd { color: #0000ff; }
.csharpcode .str { color: #006080; }
.csharpcode .op { color: #0000c0; }
.csharpcode .preproc { color: #cc6633; }
.csharpcode .asp { background-color: #ffff00; }
.csharpcode .html { color: #800000; }
.csharpcode .attr { color: #ff0000; }
.csharpcode .alt
{
background-color: #f4f4f4;
width: 100%;
margin: 0em;
}
.csharpcode .lnum { color: #606060; }