为什么我的程序不能访问Java中的数学方法？

public class Solver {
    public static void main(String[] args) {
        double angle = 1.5;
        double height = Math.sin(angle);
        System.out.print("The sine of " + angle + " is: ");
        System.out.println(height);
    }
}

当我尝试编译这个,我在终端中收到以下错误：

Solver.java:4: cannot access Math
bad class file: ./Math.java
file does not contain class Math
Please remove or make sure it appears in the correct subdirectory of the classpath.
        double height = Math.sin(angle);
                    ^
1 error

为什么我不能访问Math类？