java𞓜、&、>、

package aa;

public class BitUtils {
          
        /** 
         *            
 
         *   ： 0000 1011      0      1,   2       0
 
         *  
         * @param source 
         *                   
         * @param pos 
         *                 (0<=pos<=7) 
         * @return       (0 or 1) 
         */  
        public static byte getBitValue(byte source, int pos) {  
            return (byte) ((source >> pos) & 1);  
        }  
          
      
        /** 
         *                
 
         *  : 0000 1011       0000 1111,    2         1
 
         *  
         * @param source 
         *                   
         * @param pos 
         *                 (0<=pos<=7) 
         * @param value 
         *                  0,   1,     0    1  ,     0    0   
         *  
         * @return         
         */  
        public static byte setBitValue(byte source, int pos, byte value) {  
      
            byte mask = (byte) (1 << pos);  
            if (value > 0) {  
                source |= mask;  
            } else {  
                source &= (~mask);  
            }  
      
            return source;  
        }  
          
      
        /** 
         *            
 
         *  ： 0000 1011     3    ,     0000 0011;    2   ,     0000 1111
 
         *  
         * @param source 
         *  
         * @param pos 
         *                 (0<=pos<=7) 
         *  
         * @return         
         */  
        public static byte reverseBitValue(byte source, int pos) {  
            byte mask = (byte) (1 << pos);  
            return (byte) (source ^ mask);  
        }  
          
      
        /** 
         *              1
 
         *  
         * @param source 00001011
         *                   
         * @param pos 
         *                 (0<=pos<=7) 
         * @return true         1, false          0 
         */  
        public static boolean checkBitValue(byte source, int pos) {  
      
            source = (byte) (source >>> pos);  
      
            return (source & 1) == 1;  
        }  
      
        /** 
         *        
 
         *  
         * @param args 
         */  
        public static void main(String[] args) {  
      
            //      11 (    0000 1011)      
            byte source = 11;  
      
            //   2     ,      0000 1011  
            for (byte i = 7; i >= 0; i--) {  
                System.out.printf("%d ", getBitValue(source, i));  
            }  
      
            //   6   1    ,     75 (0100 1011)  
            System.out.println("
" + setBitValue(source, 6, (byte) 1));  
      
            //   6      ,     75(0100 1011)  
            System.out.println(reverseBitValue(source, 6));  
      
            //    6    1，    false  
            System.out.println(checkBitValue(source, 6));  
      
            //    1  ,      0 1 3  
            for (byte i = 0; i < 8; i++) {  
                if (checkBitValue(source, i)) {  
                    System.out.printf("%d ", i);  
                }  
            }  
      
    }  
}

 
転載先:https://www.cnblogs.com/wangchaoyu/p/8865696.html