MathTest.java

package com.yingyong.day02;

public class MathTest {

public static void main(String[] args) {
    // TODO Auto-generated method stub
    System.out.println(Math.E);
    System.out.println(Math.PI);
    int x = 25;
    int y = 3;
    System.out.println(Math.sqrt(x));
    System.out.println(Math.pow(x, y));
    System.out.println(Math.log(x));  //自然对数以2.72为底
    System.out.println(Math.pow(Math.E, 3.2188758248682006));
    System.out.println(Math.sin(30*3.14 / 180));
    System.out.println(Math.random());

}

}
结果：3.2188758248682006
24.99999999999999
0.4997701026431024
0.9894380325072382