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Thread: What is wrong with this code?

  1. #1
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    Default What is wrong with this code?

    package javaapplication11;



    public class HelloApp2 {
    {
    public static void main (String [] args)
    {
    Greeter myGreeterObject = new Greeter () ;
    myGreeterObject.sayHello();
    }



    }

    }

    I can't seem to find anything wrong , but the compiler says that it doesn't have a main method?


  2. #2
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    Default The compiler says the main method does not show up here, what is wrong?

    package javaapplication11;



    import javax.swing.JOptionPane;

    public class Greeter
    {

    public void sayHello()
    {
    (JOptionPAne.showMessageDialog(null
    "Hello,World", "Greeter",
    JOptionPane.INFORMATION_MESSAGE );
    }
    }

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    Default Re: What is wrong with this code?

    Please read the forum rules. You have posted 2 topics that are basically the same. I have merged your two posts for you, but please avoid doing this again, and please use the code tags (instructions of which are again in the forum rules)

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    Default I have no idea why "class or interface is expected" , or the main method is missing?

    public static void main (String [] args)
    {
    package javaapplication11;



    public class HelloApp
    {
    static String helloMessage;

    public static void main (String [] args)
    {

    helloMessage = "Hello, World !";
    System.out.println(helloMessage);
    }
    }

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    Default Re: I have no idea why "class or interface is expected" , or the main method is missi

    public static void main(String[] args) {
    }

    is the main method why do you have 2 of them?

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    Default Re: What is wrong with this code?

    @dannyboi, this is a warning. Please do not continue to force moderators to merge your threads - keep your questions regarding this topic - whatever variations of your code they may be - in this thread only. Otherwise, you will force the moderating team to take further action

  7. #7
    Junior Member hackthisred's Avatar
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    Lightbulb Re: What is wrong with this code?

    There is a lot wrong with your code lol For one it won't do anything, because you are calling methods that don't exist. Here is a good example that accomplishes something similar to what I believe you were trying to accomplish.

    import java.util.Scanner;
     
     
    public class HelloWorldObject {
     
    	private void sayHello(String name)
    	{
    		String greeting = "\nHello "+ name +" welcome to JAVA!!!";
    		System.out.println(greeting); 
    	}
     
    	public static void main(String[] args)
    	{
    		Scanner keyboard = new Scanner(System.in);
    		System.out.println("Please enter your name...");
    		new HelloWorldObject().sayHello(keyboard.next());
    	}
    }
    f34r th3 kut3 1z

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    Default Re: I have no idea why "class or interface is expected" , or the main method is missi

    Quote Originally Posted by dannyboi View Post
    public static void main (String [] args)
    {
    package javaapplication11;



    public class HelloApp
    {
    static String helloMessage;

    public static void main (String [] args)
    {

    helloMessage = "Hello, World !";
    System.out.println(helloMessage);
    }
    }
    You have two main methods, then your class identifier, that's why your error is being thrown.

    public class Random {
     
    	public static void main(String[] args) {
    		//Here's out string instance which we use in the system.out object
    		String hello = "Hello!";
    		System.out.println(hello);
    	}
     
    }

    p.s: You don't need a static string for your helloMessage instance.

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