How to Fix “class, interface, or enum expected” Error in Java with Examples?

In Java, the class interface or enum expected error is a compile-time error. There can be one of the following reasons we get “class, interface, or enum expected” error in Java: 

Case 1: Extra curly Bracket

Java

class Hello {

    public static void main(String[] args)
    {
        System.out.println("Helloworld");
    }
}
} // extra bracket.

In this case, the error can be removed by simply removing the extra bracket.

Java

class Hello {

    public static void main(String[] args)
    {
        System.out.println("Helloworld");
    }
}

Case 2: Function outside the class

Java

class Hello {
    public static void main(String args[])
    {
        System.out.println("HI");
    }
}
public static void func() { System.out.println("Hello"); }

In the earlier example, we get an error because the method func() is outside the Hello class. It can be removed by moving the closing curly braces “}” to the end of the file. In other words, move the func() method inside of​ Hello.

Java

class Hello {
    public static void main(String args[])
    {
        System.out.println("HI");
    }
    public static void func()
    {
        System.out.println("Hello");
    }
}

Case 3: Forgot to declare class at all

There might be a chance that we forgot to declare class at all. We will get this error. Check if you have declared class, interface, or enum in your java file or not.

Case 4: Declaring more than one package in the same file

Java

package A;
class A {
    void fun1() { System.out.println("Hello"); }
}
package B; //getting class interface or enum expected
public class B {
    public static void main(String[] args)
    {
        System.out.println("HI");
    }
}

We can not put different packages into the same source file. In the source file, the package statement should be the first line. 

Java

package A;
class A {
    void fun1() { System.out.println("Hello"); }
}
public class B {
    public static void main(String[] args)
    {
        System.out.println("HI");
    }
}