Java进阶1（Java 谜题）

1.

//判断奇偶数

public static boolean isOdd(int i){

return i % 2 != 0;

}

2.

//减法精确

public static BigDecimal jian(String s1,String s2){

BigDecimal jian=new BigDecimal(s1).

subtract(new BigDecimal(s2));

return jian;

}

3.

//长整除算法

public static void  chu(){

final long MICROS_PER_DAY = 24L*60*60*1000*1000;

final long MILLIS_PER_DAY = 24L*60*60*1000;

System.out.println(MICROS_PER_DAY/MILLIS_PER_DAY);

}