This content originally appeared on DEV Community and was authored by DCT Technology Pvt. Ltd.

If you’re still using Java for Android development, it’s time to ask: Why not Kotlin?

Since Google made Kotlin the official language for Android, it has skyrocketed in popularity. But what makes Kotlin the best choice for modern Android apps?

Let’s break it down!

1. Less Code, More Productivity

Kotlin is concise compared to Java. Fewer lines of code mean faster development, fewer bugs, and cleaner code.

Example: Defining a simple data class:

Java:

public class User { 
   private String name; 
   public User(String name) { this.name = name; } 
   public String getName() { return name; } 
} 

Kotlin:

data class User(val name: String) 

Less code, same functionality!

2. Null Safety = Fewer Crashes

No more dreaded NullPointerException (NPE)!

Kotlin’s null safety prevents runtime crashes by making nullable variables explicit.

var name: String? = null  // Nullable type 

Java’s NPE issues? Handled!

3. 100% Interoperable with Java

Already have an app in Java? No problem!

You can mix Kotlin with Java seamlessly, migrating at your own pace.

You can call Kotlin code from Java & vice versa without issues. Perfect for existing projects!

4. Coroutines = Asynchronous Programming Made Easy

Kotlin’s coroutines make background tasks smooth and efficient. Unlike Java’s threads, coroutines are lightweight and non-blocking.

Example: Fetching data asynchronously:

GlobalScope.launch { 
   val data = fetchData()   
   println(data)  
} 

No more callback hell!

5. Backed by Google & JetBrains

Google has officially endorsed Kotlin as the preferred Android language.

JetBrains, the creators of IntelliJ IDEA, constantly improve Kotlin, making it future-proof.

With Jetpack Compose, Google’s modern UI toolkit, Kotlin is the default choice for building beautiful UIs!

The Verdict: Should You Switch to Kotlin?

Faster, safer, and more concise than Java

Seamless Java interoperability

Perfect for modern Android apps & Jetpack Compose

In 2025, Kotlin isn’t just a better choice—it’s the best choice for Android!

Are you using Kotlin or still sticking to Java? Drop your thoughts below!

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This content originally appeared on DEV Community and was authored by DCT Technology Pvt. Ltd.