Java Basics for Beginners - Part-01

Java Interview Questions SET-01

Java Interview Questions Set-02 ARRAY

Java Interview Questions Set-03 MAP

Java Interview Question Set-04

💛" Java Basics "💚 

 Diving into the nuts and bolts of the "Java Basics" - understanding class declaration, visibility with public keyword, the efficiency of static methods, and the significance of void in method returns. Exploring main() as the program's starting point and the role of command line arguments. System.out.println() dissected for effective statement printing. 

 👉Class Keyword: 

Declares a class in Java, providing a structural foundation. 

 👉Public Keyword: 

An access modifier ensuring visibility to all parts of the program. 

 👉Static Method Advantage: 

Efficiency in memory usage as no object creation is needed to invoke static methods. 

 👉Void Return Type: 

Indicates the method doesn't return any value. 

 👉Main Method Significance: 

Marks the starting point of the program's execution. 

 👉Command Line Arguments: 

Utilizes String[] args or String args[] for flexibility in receiving input. 👉System.out.println(): Employs a hierarchy - System class, out object of PrintStream class, and println() method for statement printing. 

 👉Code Snippet: 

 public class FirstJavaProgram { 

 // Static method, no need to create an object 

static void myStaticMethod() { 

System.out.println("Inside a static method"); } 

 public static void main(String[] args) { 

// Command line arguments 

System.out.println("Command Line Arguments:"); 

for (String arg : args) { 

System.out.println(arg); 

} 

 // Invoking a static method 

myStaticMethod(); 

} 

} 

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