2个int类型的数字拼接成1个long类型的数字

/**int型数字跟long型数字转行
 * ID转换器
 */
public class IDConverter {


    /**
     * 将2个int型数字拼接成一个long类型数字
     */
    public static long combineInt2Long(int high, int low) {
        return ((long) high << 32 & 0xFFFFFFFF00000000L) | ((long) low & 0xFFFFFFFFL);
    }

    /**
     * 将一个long类型数字，拆分成2个int型数字
     */
    public static int[] seperateLong2Int(long val) {
        int[] res = new int[2];
        res[1] = (int) (0xFFFFFFFFL & val);//低位
        res[0] = (int) ((0xFFFFFFFF00000000L & val) >> 32);//高位
        return res;
    }


    /**测试*/
    public static void main(String[] args) {
        int high =1001;
        int low =200;
        long num = IDConverter.combineInt2Long(high, low);
        System.out.println("num = " + num);
        int[] ints = IDConverter.seperateLong2Int(num);
        System.out.println("ints[0] = " + ints[0]);
        System.out.println("ints[1] = " + ints[1]);
    }

}

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