位與運算符（&）

運算規(guī)則：兩個數(shù)都轉(zhuǎn)為二進制，然后從高位開始比較，如果兩個數(shù)都為1則為1，否則為0。

比如：10&30.

10轉(zhuǎn)換成二進制就是01010，30轉(zhuǎn)換成二進制就是11110。從高位開始比較得到，得到01010，即10.

public?class?HelloWorld{
????public?static?void?main(String[]?args)?{
????	???int?one?=?10?;
???????????int?two?=?20?;
???????????int?three?=?0?;????????
???????????three?=one+two;????????
???????????System.out.println(three);????????
???????????//three=0;????????
???????????three+=one;????????
???????????System.out.println(three);????????
???????????//three=0;????????
???????????three-=one;????????
???????????System.out.println(three);????????????????
???????????//three=0;????????
???????????three*=one;????????
???????????System.out.println(three);????????????????
???????????//three=0;????????
???????????three/=one;????????
???????????System.out.println(three);????????????????
???????????//three=0;????????
???????????three?&=one;????????
???????????System.out.println(three);???????????????????	
???????????}
??}

厲害的一個一個敲空格，這排版跟shi一樣

public?class?HelloWorld{????public?static?void?main(String[]?args)?{	???int?one?=?10?;????????int?two?=?20?;????????int?three?=?0?;????????three?=one+two;????????System.out.println(three);????????//three=0;????????three+=one;????????System.out.println(three);????????//three=0;????????three-=one;????????System.out.println(three);????????????????//three=0;????????three*=one;????????System.out.println(three);????????????????//three=0;????????three/=one;????????System.out.println(three);????????????????//three=0;????????three?&=one;????????System.out.println(three);???????????????????	}}

代碼如下