Static vs Non-Static Methods in Java & For Loop vs While Loop

By Bhau Automation • Java Programming Tutorial

🎯 What You Will Learn

Static Method in Java
Non-Static Method in Java
Differences between static and non-static methods
For loop vs while loop
Java examples with output
Interview questions

💡 Pro Tip: Mastering static methods and loops greatly improves your Java coding efficiency.

📌 What is a Static Method?

A static method belongs to the class and can be accessed without creating an object.

class Test {
    static void show() {
        System.out.println("Static Method");
    }
    public static void main(String[] args) {
        show();
    }
}

📌 What is a Non-Static Method?

A non-static method requires an object for execution.

class Demo {
    void display() {
        System.out.println("Non-static Method");
    }

    public static void main(String[] args) {
        Demo obj = new Demo();
        obj.display();
    }
}

📊 Difference: Static vs Non-Static Method

Feature	Static Method	Non-Static Method
Class/Object	Class based	Object based
Access	Direct	Using Object
Memory	One copy	Multiple copies
Used for	Common logic	Object logic

🔁 For Loop in Java

Used when the number of iterations is known.

for(int i=1;i<=5;i++){
    System.out.println(i);
}

🔁 While Loop in Java

Used when the number of iterations is unknown.

int i=1;
while(i<=5){
   System.out.println(i);
   i++;
}

🔍 Difference: For Loop vs While Loop

Feature	For Loop	While Loop
Use	Known iterations	Unknown iterations
Initialization	Inside loop	Outside
Readability	Compact	Readable

❓ Interview Questions

Q1: Can we overload static methods? ✅ Yes
Q2: Can static method access non-static data? ❌ No
Q3: Difference between for and while loop? ✅ Control & usage
Q4: Can main() be overloaded? ✅ Yes

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✅ Key Takeaways

Static methods do not need objects
Non-static methods need objects
For loop = count controlled
While loop = condition controlled
Both are essential in Java development

🚀 Created by Bhau Automation

Static vs Non-Static Methods in Java & For Loop vs While Loop – Complete Guide