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Which is the best use case for a record?

1 week ago | [YT] | 8

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Records vs Classes

Which of the following cannot be done with a record?

2 weeks ago | [YT] | 6

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record Product(String name, double price) {
Product {
if (price < 0) {
throw new IllegalArgumentException("Price must be positive");
}
}
}

2 weeks ago | [YT] | 3

Code With Nikita

🎉 Happy New Year 2026! 🎉
Is naye saal mein
✨ naye goals
✨ nayi energy
✨ aur nayi kamyabi

aap sabke saath ho 💙

Thank you itna pyaar aur support dene ke liye 🙏
Umeed hai aane wala saal
aur bhi achha content, positivity aur growth lekar aayega 🚀

💫 Stay happy, stay motivated! 💫

2 weeks ago | [YT] | 3

Code With Nikita

Why are records considered immutable?

2 weeks ago | [YT] | 4

Code With Nikita

Which of the following is a valid record declaration?

2 weeks ago | [YT] | 5

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What is a Java record mainly used for?

3 weeks ago | [YT] | 7

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😳 “90% Java Devs Ye Feature Use Hi Nahi Karte”
👉 Java Records – Proper Explanation

🔹 Step 1: Record kya hota hai?
record User(String name, int age) {}


📌 Record = special class (Java 16+)

Is 1 line se Java automatically bana deta hai:

✔️ private final String name;
✔️ private final int age;
✔️ Constructor
✔️ name() getter
✔️ age() getter
✔️ equals()
✔️ hashCode()
✔️ toString()

👉 Matlab POJO ka 90% kaam khud ho gaya.

🔹 Step 2: Object kaise banega?
User u = new User("Rahul", 25);


✔️ Constructor automatically available
✔️ Values set ho jaati hain
✔️ Fields final hoti hain (change nahi ho sakti)

❌ Ye allowed nahi hai:

u.age = 30; // ❌ Compile-time error


📌 Record = Immutable

🔹 Step 3: Print karne pe kya hota hai?
System.out.println(u);

🔥 Output:
User[name=Rahul, age=25]


📌 Java ne toString() khud generate kiya
📌 Clean & readable output

🔹 Step 4: Getters kaise milte hain?

❌ Old Java:

u.getName();
u.getAge();


✅ Record:

u.name();
u.age();


📌 Getter ka naam field ke naam jaisa hi hota hai

🔹 Step 5: Old Java vs Record (Clear Difference)
❌ Old Java POJO
class User {
private String name;
private int age;

public User(String name, int age) {
this.name = name;
this.age = age;
}

public String getName() { return name; }
public int getAge() { return age; }

@Override
public String toString() {
return "User{name='" + name + "', age=" + age + "}";
}
}


😵 30–40 lines

✅ Record Version
record User(String name, int age) {}


😎 1 line

4 weeks ago | [YT] | 6

Code With Nikita

Agar aap Java Developer ho, ye MISS nahi kar sakte
Object o = "Java";

String result = switch (o) {
case String s && s.length() > 3 -> "Long String";
case String s -> "Short String";
default -> "Unknown";
};
Explanation:
1️⃣ Object o = "Java";
➡️ Variable o ka type Object hai, but actual value String hai.

2️⃣ switch (o)
➡️ Ab Java type check bhi karega aur value check bhi.

3️⃣ case String s && s.length() > 3
➡️ Matlab:

Agar o String ho

Aur uski length 3 se zyada ho
➡️ Toh automatically String s mil jaayega
👉 No casting needed

4️⃣ "Java" ki length = 4
➡️ Condition match ho gayi
➡️ Result = "Long String"

📌 Why this is IMPORTANT?

❌ Old Java:
if (o instanceof String) {
String s = (String) o;
if (s.length() > 3) {
...
}
}

Modern Java:
case String s && s.length() > 3 -> ...

“Type check + cast + condition — sab ek line me 🔥”

1 month ago | [YT] | 7

Code With Nikita

Which loop guarantees at least one execution?

1 month ago | [YT] | 4