Common Mistakes Java Beginners Makes

✔️ Correct Code :

public class Home{
public static void main (String[] args){
System.out.println("hello world");
}
}

❌ 1. Class name and file name don’t match.

public class home{}

my actual file name is Home.java, above the code class name is home.

File name must be Home.java

Otherwise you will get a compile error

OUTPUT ERROR:

❌ 2. Wrong main method syntax

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

✔️ What is String[] args?

• It is an array of strings
• It stores command line arguments when the program runs

OUTPUT ERROR:

❌ 3. Missing semicolon (;)

System.out.println("hello world")

👉 You must add ;
❌ Otherwise error

OUTPUT ERROR:

❌ 4. Wrong capital letters

system.out.println("Hello");

👉 Java is case-sensitive
✔️ Correct is System

OUTPUT ERROR:

❌ 5. Missing curly braces { }

public class Home {
    public static void main(String[] args) {
        System.out.println("Hi");

👉 You forgot closing }
❌ This will cause an error

OUTPUT ERROR:

❌ 6. Missing quotes

System.out.println("Hello World);

👉 Strings need quotes " "
✔️ Correct: "Hello World"

OUTPUT ERROR:

❌ 7. Confusion between print and println

System.out.print("Hi");
System.out.print("Hello");

👉 Output will be on the same line
✔️ println prints on a new line

OUTPUT :