Java Inheritance: Child class not executing

February 13, 2022

I was practicing inheritance in Java, and faced the following issue:

Code for parent class:

public class FEB7 {
String address,name;
void get(String n, String a){
    name = n;
    address = a;
}
void show(){
    System.out.println("name is "+name);
    System.out.println("address is " + address);
}
public static void main(String args[]) {
    // compile time poly is method overloading, we will look at runtime poly
    FEB7 obj = new FEB7();
    obj.get("name1","address1");
    obj.show();
} }

Code for child class:

public class FEB8 extends FEB7 {
String regno;

void get(String r) {
    regno = r;
}

void showreg() {
    System.out.println("regno is " + regno);
}

public static void main(String args) {
    FEB8 obj1 = new FEB8();
    obj1.get("name2", "address2");
    obj1.get("regno1");
    obj1.show();
    obj1.showreg();
}}

Both are separate .java files. When i try to execute the parent class file, it works but for some reason i cannot even run the child class. The following message is there:

The file FEB8.java is not executable. please select a main class you want to run

How do i solve this issue?