java.lang.Long.numberOfTrailingZeros() 方法返回零位以下的最低階(“最右”)數指定long值的二進位制二補數表示一位元。它返回64,如果指定的值沒有一個位元的二補數表示,換句話說,如果它等於零。
以下是java.lang.Long.numberOfTrailingZeros()方法的宣告
public static int numberOfTrailingZeros(long i)
i -- 這是long 值。
此方法返回零位以下的最低階(“最右”)數指定long值的二進位制二補數表示法,或64如果是否等於零。
NA
下面的例子顯示java.lang.Long.numberOfTrailingZeros()方法的使用。
package com.yiibai; import java.lang.*; public class LongDemo { public static void main(String[] args) { long l = 210; System.out.println("Number = " + l); /* returns the string representation of the unsigned long value represented by the argument in binary (base 2) */ System.out.println("Binary = " + Long.toBinaryString(l)); /* returns a long value with at most a single one-bit, in the position of the lowest-order ("rightmost") one-bit in the specified int value.*/ System.out.println("Lowest one bit = " + Long.lowestOneBit(l)); /*returns the number of zero bits preceding the highest-order ("leftmost")one-bit */ System.out.print("Number of leading zeros = "); System.out.println(Long.numberOfLeadingZeros(l)); /* returns the number of zero bits following the lowest-order ("rightmost") one-bit */ System.out.print("Number of trailing zeros = "); System.out.println(Long.numberOfTrailingZeros(l)); } }
讓我們來編譯和執行上面的程式,這將產生以下結果:
Number = 210 Binary = 11010010 Lowest one bit = 2 Number of leading zeros = 56 Number of trailing zeros = 1