Error NoSuchMethod
Please help me!!! I am new in java and I tried the next programm:
import javax.swing.JOptionPane;
class My_programm {
int a;
int b;
int S;
public static void main( String args[]) {
{
a = Integer.parseInt(JOptionPane.showInputDialog("First num"));
b = Integer.parseInt(JOptionPane.showInputDialog("Second num"));
S=a+b;
System.out.println("The Sum");
System.out.println(S);
;
}
}
}
When I run it, I get the error Exception in thread "main" java.lang.NoSuchMethodError: main
Please help me
# 1
The code you posted does not compile so it appears that the code you posted is not what you are running. For one thing, you have "My_programm" where you probably want "My_program"
When you post code, use the code tags - there's a button labeled code right next to the Spell Check button. Also, always post the full, exact error message.
# 2
Sorry! I am a newcomer!
At compilation I get the error : non-static variable __(an letter a,b,S) cannot be referenced from a static context.
import javax.swing.JOptionPane;
public class Programul_meu {
private int a;
private int b;
private int S;
public static void main( String args[]) {
{
a = Integer.parseInt(JOptionPane.showInputDialog("Primul termen al sumei"));
b = Integer.parseInt(JOptionPane.showInputDialog("Al doilea termen al sumei"));
S=a+b;
System.out.println("Suma este");
System.out.println(S);
}
}
}
IF YOU CAN HELP ME AND I AM OFFLINE, MY EMAIL ADDRES IS
bidaeusebiu@yahoo.com
# 3
import javax.swing.JOptionPane;
public class Programul_meu {
private int a;
private int b;
private int S;
public void main( String args[]) {
{
;
a = Integer.parseInt(JOptionPane.showInputDialog("Primul termen al sumei"));
b = Integer.parseInt(JOptionPane.showInputDialog("Al doilea termen al sumei"));
S=a+b;
System.out.println("Suma este");
System.out.println(S);
}
}
}
This program works to compile, but when I run it I get the error Exception in thread "main" java.lang.NoSuchMethodError: main
# 4
Look closely when you post a message. Right above the text area is a button labeled "code" Click on that button. Then paste your code between the code tags [code] and [/code]
In the code you posted, S is an instance variable. So are a & b. Instance variable means they belong to an instance of the class. You have not created an instance. You create an instance with the "new' operator.
With what I think you are trying to do, the easiest fix is to make a, b, and S part of the main method.
# 5
> This program works to compile, but when I run it I
> get the error Exception in thread "main"
> java.lang.NoSuchMethodError: main
When you launch a Java application, the JVM looks for a method inside the class you specified with a format ofpublic static void main(String[] args)
Because you did not have "static" in your main method, the JVM can not find it - therefore NoSuchMethodError:main
# 6
Thanks! I found the error and now the program works.
Now I have a question: Can I compile the *.class file in another type of file (better exe) or jar because I want to run the program by double click on a computer which havent Java Software(JDK) ?
IF I CAN , tell me more informations about how to do it!
The correct code:
import javax.swing.JOptionPane;
public class Programul_meu {
static int a;
static int b;
static int S;
public static void main( String args[]) {
{
;
a = Integer.parseInt(JOptionPane.showInputDialog("Primul termen al sumei"));
b = Integer.parseInt(JOptionPane.showInputDialog("Al doilea termen al sumei"));
S=a+b;
System.out.println("Suma este");
System.out.println(S);
}
}
}
