高手进来~~~

[vitasstars]

interface Mather
{
double PI=3.14159;

}

class Vitas implements Mather
{
double area(double radius)
{
return PI*radius*radius;
}
class Student
{
public static void main(String [] args)
{
Vitas a=new Vitas();

System.out.println(a.area(3));
System.out.println(Mather.PI);
System.out.println(Vitas.PI);
System.out.println(a.PI);
}
}
}

在编译的时候说main方法错了，，请高手指点指点~~~

[hmsuccess]

interface Mather  
{ 
		double PI=3.14159; 

} 

class Vitas implements Mather  
{ 
    double area(double radius) 
		{ 
				return PI*radius*radius; 
		}
} 

public class Student 
{ 
		public static void main(String [] args) 
		{ 
				Vitas a=new Vitas(); 

				System.out.println(a.area(3)); 
				System.out.println(Mather.PI); 
				System.out.println(Vitas.PI); 
				System.out.println(a.PI); 
		} 
} 
 

[nwsl]

interface Mather {
	double PI = 3.14159;

}

class Vitas implements Mather {
	double area(double radius) {
		return PI * radius * radius;
	}

	static class Student {
		public static void main(String[] args) {
			Vitas a = new Vitas();

			System.out.println(a.area(3));
			System.out.println(Mather.PI);
			System.out.println(Vitas.PI);
			System.out.println(a.PI);
		}
	}
}

[vitasstars]

[Quote=引用 5 楼 hmsuccess 的回复:]
Java code
interface Mather
{
double PI=3.14159;

}

class Vitas implements Mather
{
double area(double radius)
{
return PI*radius*radius;
}
}

public class Student
{
public static void main(String [] args)
{
Vitas a=new Vitas();

System.out.println(a.area(3));
…
[/Quote]

[zjhlht]

main方法怎么在内部类里面？

[y8t47h]

要养好的编程习惯

[healer_kx]

接分。

[hmsuccess]

class Student 应该是punlic吧

[sunhw2002]

你应该把整个Student类放到Vitas外面
然后javac,java Student就可以了

[popyy0101]

class Student
{
public static void main(String [] args)
{

这些以下的东西都应该拿到外面吧
不知道lz是不是这个意思