staticmethod.java

来自「java代码100例子」· Java 代码 · 共 29 行

import java.math.*;
public class StaticMethod
{
	double Radius;
	StaticMethod(double r)
	{
		Radius=r;
	}
	static double CircleArea(double r)
{
		return Math.PI*r*r;
	}
	double Area()
	{
		return Math.PI*Radius*Radius;
	}
	public static void main (String[] args)
	{
      System.out.println("Area="+CircleArea(2.0));	
               //dirextly access static method
		StaticMethod obj=new StaticMethod(2.0);
		System.out.println("Area="+obj.Area());	
              // access non-static method through object
              
            //  System.out.println("Area="+obj.CircleArea(2.0));
              
            	}
             }