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Difference between Java and Kotlin in Android with Examples
Kotlin was introduced in Android development considering multiple enhancements in Kotlin w.r.t Java. For example:
Less no. of Lines and easier development with the same functionality.
Java:
TextView displayText = (TextView) findViewById(R.id.textView);
displayText.setText("Hello World");
Kotlin:
textView.setText("Hello World")Compile-time handling of infamous null pointer exception.
var value: String = "abc" // compilation error value = null
Data class instead of POJO.
data class User(val name: String, val age: Int)
The following are some of the important differences between Java and Kotlin.
| Sr. No. | Key | Java | Kotlin |
|---|---|---|---|
| 1 | Exceptions | Java uses checked exceptions for exception handling. | Kotlin has no checked exception. It throws compile-time errors. |
| 2 | Null Handling | Java has not enforced null check thus null pointer exception arises when code is not handling null. | Kotlin enforces the null check at compile time. |
| 3 | Non-Private Fields | Java constructs have non-private fields. | Kotlin does not allow non-private fields in its constructs. |
| 4 | Arrays | Java arrays are covariant. | Kotlin arrays are invariant. |
| 5 | Ternary Operator | Java has a ternary operator. | Kotlin does not support a ternary operator. |
Updated on: 16-Apr-2020
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