user1896464 user1896464 - 1 month ago 10
Java Question

No enclosing instance of type is accessible

I wrote this Java interface program in Eclipse, but there is a red line under MyTriangle tmp = new MyTriangle(); and when i run the program I get this error:


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;
}
}

Answer

Try this. Removed the methods for simplicity

public class Test1 {     

    public static void main( String [] args) 
    { 
        MyTriangle h1 = new MyTriangle();     
    } 
} 
class MyTriangle implements Triangle{
    int side1;
    int side2;
    int side3;

    public MyTriangle(){
        this.side1 = 1;
        this.side2 = 2;
        this.side3 = 3;
    }
}
interface Triangle{}

You have not pasted your full code, I assume your code should look something like below.

Then you should create the Instance for your main class before creating instance for your triangle as shown below

public class Test{
     class MyTriangle 
     {
      int side1,side2,side3;
      public   MyTriangle()
      {
        this.side1 = 3;
        this.side2 = 4;
        this.side3 = 5;
      } 

    }
public static void main(String[] args) 
    {   
     MyTriangle h1 = new Test(). new MyTriangle();   // Fix is here**   
     }
}

interface Triangle{}