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将指定的位设置为一个值
//package com.nowjava; public class Main {/**来 自 NowJava.com - 时代Java**/ public static void main(String[] argv) throws Exception { byte value = 2; int bit = 2; boolean on = true; System.out.println(setBit(value, bit, on)); } /** * sets the specified bit to a value * @param value the base value * @param bit the bit number * @param on set it to on or not * @return value with the bit set */ public static byte setBit(byte value, int bit, boolean on) { if (bit < 0 || bit >= 8) throw new IllegalArgumentException("invalid bit position"); byte pos = (byte) (1 << bit); if (on) return (byte) (value | pos); else return (byte) (value & ~pos); } /** 来自 时 代 Java - nowjava.com**/ /** * sets the specified bit to a value * @param value the base value * @param bit the bit number * @param on set it to on or not * @return value with the bit set */ public static short setBit(short value, int bit, boolean on) { if (bit < 0 || bit >= 16) throw new IllegalArgumentException("invalid bit position"); short pos = (short) (1 << bit); if (on) return (short) (value | pos); else return (short) (value & ~pos); } /** * sets the specified bit to a value * @param value the base value * @param bit the bit number * @param on set it to on or not * @return value with the bit set */ public static int setBit(int value, int bit, boolean on) { if (bit < 0 || bit >= 32) throw new IllegalArgumentException("invalid bit position"); int pos = 1 << bit; if (on) return value | pos; else return value & ~pos; } /** * sets the specified bit to a value * @param value the base value * @param bit the bit number * @param on set it to on or not * @return value with the bit set */