Error: Main Method Not Found in Class Calculate, Please Define the Main Method As: Public Static Void Main(String[] Args)

Main method not found even if I've declared it

As said in my comments, looks like you've declared a String class among your own classes. To prove this, I've created a basic example:

class String {
}

public class CarelessMain {
    public static void main(String[] args) {
        System.out.println("won't get printed");
    }
    public static void main(java.lang.String[] args) {
        System.out.println("worked");
    }
}

If you execute this code, it will print "worked" in the console. If you comment the second main method, the application will throw an error with this message (similar for your environment):

Error: Main method not found in class edu.home.poc.component.CarelessMain, please define the main method as:

public static void main(String[] args)

Why can not pass int as argument in main method

The error tell evething. either you forget to declare main method or somthing missing in main method declaration. In Java Programming The main() method is a special method that serves as the externally exposed entrance point by which a Java program can be run. To compile a Java program, you doesn't really need a main() method in your program. But, while execution JVM searches for the main() method and starts executing from it.

You declare int argument in main method but it shoud be String[] args. now one question arise in your mind Why String args[]? because When you run a Java program from a command line, you are allowed to pass data into that program as comnand line arguments.Your Java program will run from a main() method, and the arguments you typed on the command line will appear to the Java program as Strings in that array.

Here down is right syntex:

public static void main(String[] args) {
    // Some code inside main function....
}

And your code should be:

public class Main {
    static void printSomeNumber()
    {
        int a = 10;
        int b = 20;
        System.out.printf("%d %d", a, b);
    }
    public static void main(String args[]) {  
        printSomeNumber();  
    }
}

Error :: Main method not found in class

To start a java program you need the main method which not define in your code you can make it like this :

public class Test {

    public void printPhoto(int width, int height, boolean inColor) {
        System.out.println("Width = " + width + " cm");
        System.out.println("Height = " + height + " cm");
        if (inColor) {
            System.out.println("Print is Full color.");
        } else {
            System.out.println("Print is black and white.");
        }
        // printPhoto(10, 20, false); // Avoid a Stack Overflow due the recursive call
    }

    //main class
    public static void main(String[] args) {
        Test tst = new Test();//create a new instance of your class
        tst.printPhoto(0, 0, true);//call your method with some values        
    }

}

Error - ''Main method not found in class Node, please define the main method as.... in the following code:

I suspect you've named the java file as "Node.java" instead of "BinaryTree.java", the code throws error since there isn't any main function in class Node (that you're trying to run) but in class BinaryTree. The problem shall resolve if you rename your file to BinaryTree.

Error: Main method not found in class TextBook, please define the main method as: public static void main(String[] args)

You can only run java file with main method.

In your case, you can only run DemoBook.java

---

Related Topics