packagetest2.java

Java面向对象编程(随书配套源代码) 阐述了面向对象编程的思想

package chapter7;
import static java.lang.Math.*;
public class PackageTest2 
{
	public static void main(String[] args)
	{
		System.out.println(PI);
		System.out.println(sin(30));
	}
}