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System.out.println(2|0); //0010 0000 =>0010 = 2
System.out.println(2|1); //0010 0001 =>0011 = 3
System.out.println(3|2); //0011 0010 =>0011 = 3
System.out.println(3&2); //0011 0010 =>0010 = 2
/*
ÔÚjavaÖÐ0´ú±í¼Ù, 1´ú±íÕæ
00011|0010 ´ÓÓÒµ½×ó±È½Ï0|1 = 1, 1|0 = 1 ½á¹ûΪ0011
СÌáʾ:Integer.toBinaryString(7),¿ÉÒÔ»ñµÃ7µÄ¶þ½øÖÆ
*/
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