java中Math类

package frank;
import java.lang.*;
import java.nio.charset.Charset;
/**
* Math类
* */
public class App
{
public static void main(String[] args)throws Exception
{
float f1 = 1.2F;
double d1 = 2.5D;
int i = 10;
System.out.println("-----------------"+f1+"----------------------------");
System.out.println("向上取整："+Math.ceil(f1));
System.out.println("向下取整："+Math.floor(f1));
System.out.println("-----------------"+d1+"----------------------------");
System.out.println("四舍五入取整："+Math.round(d1));
System.out.println("-----------------计算平方和立方----------------------------");
System.out.println("计算"+i+"的平方："+Math.sqrt(i));
System.out.println("计算"+i+"的立方："+Math.cbrt(i));
System.out.println("返回一个0.0~1.0的随机数："+Math.random());
}
}