<分区>
我在Eclipse中写了这个Java接口(interface)程序，但是在MyTriangle tmp = new MyTriangle();下面有一条红线，当我运行这个程序时，我得到了这个错误:
No enclosing instance of type Question1 is accessible. Must qualify the allocation with an enclosing instance of type Question1 (e.g. x.new A() where x is an instance of Question1).
public static void main(String[] args)
{
MyTriangle tmp = new MyTriangle();
tmp.getSides();
System.out.println();
System.out.println("The area of the triangle is " + tmp.computeArea());
}
interface Triangle
{
public void triangle();
public void iniTriangle(int side1, int side2, int side3);
public void setSides(int side1, int side2, int side3);
public void getSides();
public String typeOfTriangle();
public double computeArea();
}
class MyTriangle implements Triangle
{
private int side1,side2,side3;
public void triangle()
{
this.side1 = 3;
this.side2 = 4;
this.side3 = 5;
}
}