Web如果你想得到5,你只需要保留最低有效的4位(并将所有剩余的重置为0): int x = 10;System.out.println (~x & 0xf); 对于更一般的解决方案,如果只想对n最低有效位求反(其中n-1是输入数字中最高1位的索引),并保留所有较高的位0,可以使用Lino的建议: System.out.println (~x & ((Integer.highestOneBit(x) << 1) - 1)); Webjava.lang.Long.highestOneBit() 方法在指定long值返回一个long值至多单个1位,在最高位(“最左”)1位的位置。它返回零,如果指定的值没有一个位在其二进制补码表示法,即,如果它等于零。 声明. 以下是java.lang.Long.highestOneBit()方法的声明. public static long highestOneBit (long i ...
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Web29 de jul. de 2013 · 1、在写代码的过程中,偶尔使用到了 Integer.highestOneBit(i)这个函数调用。 使用的第一感觉就是这个函数是干什么用的,通过查看文档得知,这个函数的作用是取 i 这个数的二进制形式最左边的最高一位且高位后面全部补零,最后返回int型的结果。 WebBe careful with the number representations. This recipe works fine for positive 32 bit integers. But std::log2() returns nan for negative arguments and int(nan) evaluates to 0x80000000 which is the largest negative int. This can be observed for g++7.3 but I am afraid that this is not portable. pop shower bss
java - Code for displaying the smallest power of 2 greater than …
WebLong Wrapper Class in Java. The Long class wraps a value of the primitive type long in an object. An object of type Long contains a single field whose type is long. In addition, this class provides several methods for converting a long to a String and a String to a long, as well as other constants and methods useful when dealing with a long. WebThe highestOneBit(int i) method simply returns the int value with a single one-bit, in the position of the highest-order one-bit in the specified value, or zero if the specified value is itself equal to zer0. Compatibility Version : Requires Java 1.5 and up. Exception : N/A. WebRetorna um int valor com no máximo um único bit, na posição de um bit de ordem mais alta ("leftmost") no valor especificado int . sharis of sacramento