java基礎<math和Random>

public class mathRandom {
public static void main(String[] args) {
// TODO Auto-generated method stub
double a = 4;
double b = -3;
System.out.println("-3的絕對值"+Math.abs(b));
System.out.println("4和3的最大值："+Math.max(a, b));
System.out.println("4和-3的最小值"+Math.min(a, b));
System.out.println("-3的4次冪"+Math.pow(b, a));
System.out.println("4的開方"+Math.sqrt(a));
System.out.println("4的對數"+Math.log(a));
System.out.println("4的正玄值"+Math.sin(a));
System.out.println("4的反玄值："+Math.asin(a));
System.out.println("隨機數"+Math.random());
}

}

random用法

import java.util.Random;


public class mathRandom {


public static void main(String[] args) {
// TODO Auto-generated method stub

/*用math取隨機數的話 不太方便 我們用random取隨機數*/
// System.out.println("隨機數"+Math.random());
// ran.nextInt(10)設定取值範圍是10以內
Random ran = new Random();

for(int i = 0; i < 6; i++)//取6個隨機數
{
System.out.print( ran.nextInt(10)+" ");
}
}


}