Error occurred in program of multiple inheritance in java

[Ajay Bhalala]

Hi all,

I have create a program of multiple inheritance in java

My file name is 11.java
Here is my program :

class abc
{
    int a,b;
    abc()
    {
        a=b=10;
    }
    abc(int x)
    {
        a=b=x;
    }
}
class def extends abc
{
    int d,e,f;
    def()
    {
        d=e=f=15;
    }
    def(int m,int n,int o)
    {
        super(m);
        d=n;
        e=f=0;
    }
    void dis()
    {
        System.out.print(a + " " + b + " " + d + " " + e + " " + f);
    }
}
class mno extends def
{
    int m,n;
    mno()
    {
        m=n=20;
    }
    mno(int q, int r, int s, int t)
    {
        super(q,r,s);
        m=s;
        n=t;
    }
    void show()
    {
        System.out.print(m + " " + n);
    }
}
class exminh
{
    public static void main(String args[])
    {
        mno x=new mno();
        mno y=new mno();
        mno(57,67,76,81);
        x.show();
        x.dis();
        y.show();
        y.dis();
    }
}
 

I have run this but the following error occurred :-

Error :

11.java:55: cannot find symbol
symbol : method mno(int,int,int,int)
location: class exminh
                mno(57,67,76,81);
                ^
1 error

Please give me any suggestion to solve this error.

[chaarmann]

In line 55 , you are trying to call method "mno" in class "exminh", but it does not exist. Instead, you have defined it as constructor of class "mno". Sso to call it, you have to change this line to

mno z=new mno(57,67,76,81);

By the way, please get used to java coding standards! Beginners think they are not important, but experts can strongly confirm you that they are. Classes are written with a capital letter at the beginning, but methods not! That is exactly the point why this error happened to you: you thought that "mno" is a method because of lower-case, but in reality it is a class constructor that you have wrongly written with lowercase. So after correction, the correct line 55 would be:

Mno z=new Mno(57,67,76,81);

[Ajay Bhalala]

Thank you so much for solving my error and also for your great and very useful suggestion.

Your suggestion is really very useful

Thank You soooooooo much.