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  • Java笔记1(位运算)

    1、位运算:| 操作符使用
    public class WeiHuoTest{
           public static void main(String[] args){
                   int number1 = 10;
                  int number2 = 8;
      /*
        number1: 10
        0000 0000 0000 0000 0000 0000 0000 1010
        number2: 8
        0000 0000 0000 0000 0000 0000 0000 1000
      -----------------------------------------
      0000 0000 0000 0000 0000 0000 0000 1010
      0000 0000 0000 0000 0000 0000 0000 1000
      ---------------------------------------
      0000 0000 0000 0000 0000 0000 0000 1010 --->10
       
      */
      System.out.println(number1|number2);
     }
    }

    2、位运算符:& 的操作 

    public class WeiYuTest{  

          public static void main(String[] args){   

                       int number1 = 10;  

                       int number2 = 8;

            /*     number1: 10   

                                 0000 0000 0000 0000 0000 0000 0000 1010    

                    number2: 8    

                                 0000 0000 0000 0000 0000 0000 0000 1000   

                       ------------------------------------------  

                                 0000 0000 0000 0000 0000 0000 0000 1010   

                                 0000 0000 0000 0000 0000 0000 0000 1000   

                         ---------------------------------------  

                                 0000 0000 0000 0000 0000 0000 0000 1000----->8

      */

      System.out.println(number1&number2);  } }

    3、位运算符:^ 异或操作符的使用

     public class WeiYiHuoTest{

                public static void main(String[] args){  

                                int number1 = 10;   int number2 = 8;

      /*     number1: 10    

                      0000 0000 0000 0000 0000 0000 0000 1010   

               number2: 8    

                      0000 0000 0000 0000 0000 0000 0000 1000  

                                   -----------------------------------------   

                      0000 0000 0000 0000 0000 0000 0000 1010    

                      0000 0000 0000 0000 0000 0000 0000 1000    

                                     ---------------------------------------    

                      0000 0000 0000 0000 0000 0000 0000 0010---->2   */

      System.out.println(number1^number2);  } }

    4、位运算符:>>、<<操作符的使用

     public class WeiYiDong{

                  public static void main(String[] args){   

                                   int number = 8;

      /* 右移  

                        0000 0000 0000 0000 0000 0000 0000 1000   

                        0000 0000 0000 0000 0000 0000 0000 0010    ---->2   */

                      System.out.println(number>>2);   

     /* 左移   

                        0000 0000 0000 0000 0000 0000 0000 1000  

                        0000 0000 0000 0000 0000 0000 0010 0000    ---->32   */              System.out.println(number<<2);

                                 int number1 = -8;   

    /* 右移  

                         1000 0000 0000 0000 0000 0000 0000 1000  

                         1000 0000 0000 0000 0000 0000 0000 0010      -2    */  

                   System.out.println(number1>>2);    } }

    5、位运算:>>>无符号的右移

     public class WeiWfh{  

            public static void main(String[] args){   

                                    int number = -10;

      /*  

          1000 0000 0000 0000 0000 0000 0000 1010(原码)   

          1111 1111 1111 1111 1111 1111 1111 0101(反码)  

     +                                                                  1  

               ------------------------------------------  

           1111 1111 1111 1111 1111 1111 1111 0110 (补码)  

           0011 1111 1111 1111 1111 1111 1111 1101  移位后的(正数)

                ----------------------------------------   

            0011 1111 1111 1111 1111 1111 1111 1101(正数的原码)

         */

      System.out.println(number>>>2);  } }

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  • 原文地址:https://www.cnblogs.com/Ly426/p/4718535.html
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