Java软贱攻城狮

范例：四舍五入：public static long round(double a)数据小数位>0.5才进位，<=0.5不进位public class Demo { public static void main(String[] args) { System.out.println(Math.round(15.5)); System.out.println(Math.rou...

范例：随机产生10个0~99正整数import java.util.Random;public class Demo { public static void main(String[] args) { Random ran = new Random(); for (int i = 0; i < 10; i++) { System.out.print(ran.nextIn...

范例：import java.math.BigInteger;public class Demo { public static void main(String[] args) { BigInteger bigA = new BigInteger("35564564178895"); BigInteger bigB = new BigInteger("16544664623186"...

范例：import java.math.BigDecimal;class MyMath { public static double divide(double num, int scal) { BigDecimal bigA = new BigDecimal(num); BigDecimal bigB = new BigDecimal(1); return bigA.divid...