Java ve Kotlin Syntax Farklılıkları ve Örnekleri
Kotlin ve Java Syntax benzerlikleri ve farklılıkları
Java ve Kotlin Syntax Farklılıkları ve Örnekleri
Örnek 1: Class ve Method kullanımı
| Java |
public class MainActivity extends AppCompatActivity{
@Override
protected void onCreate(Bundle savedInstanceState){
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
}
} |
| Kotlin |
class MainActivity : AppCompatActivity{
override fun onCreate(savedInstanceState: Bundle?){
super.onCreate(savedInstanceState)
setContentView(R.layout.activity_main)
}
} |
Örnek 2: Android Nesneleri kullanımı
| Java |
public class MainActivity extends AppCompatActivity{
@Override
protected void onCreate(Bundle savedInstanceState){
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
setSupportActionBar(toolbar);
FloatingActionButton myfab = (FloatingActionButton) findViewById(R.id.myfab);
myfab.setOnClickListener(new View.OnClickListener(){
@Override
public void onClick(View view){
Snackbar.make(view, "This is a snackbar",Snackbar.LENGTH_LONG).setAction("Action",null).show();
}
}
}
} |
| Kotlin |
class MainActivity : AppCompatActivity{
override fun onCreate(savedInstanceState: Bundle?){
super.onCreate(savedInstanceState)
setContentView(R.layout.activity_main)
val toolbar = findViewById(R.id.toolbar) as Toolbar
setSupportActionBar(toolbar)
val myfab = findViewById(R.id.myfab) as FloatingActionButton
myfab.setOnClickListener { view -> Snackbar.make(view,"This is a snackbar", Snackbar.LENGTH_LONG).setAction("Action",null).show()
}
} |
Örnek 3: Button Click Event
| Java |
@Override
protected void onCreate(Bundle savedInstanceState){
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
Button next = (Button) findViewById(R.id.btn01);
next.setOnClickListener(new View.OnClickListener(){
public boid onClick(View view){
Intent myIntent = new Intent(view.getContext(),KotlinActivity.class);
startActivityForResult(myIntent,0);
}
}
} |
| Kotlin |
override fun onCreate(savedInstanceState: Bundle?){
super.onCreate(savedInstanceState)
setContentView(R.layout.activity_kt)
val next = findViewById(R.id.button02) as Button
next.setOnClickListener{
val intent: Intent = Intent()
setResult(RESULT_OK, intent)
finish()
}
} |
Örnek 4: Method kullanımı
| Java |
public class MainActivity extends AppCompatActivity{
@Override
protected void onCreate(Bundle savedInstanceState){
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
}
public static void main(String[] args){
System.out.println("Hello world");
}
@Override
public String toString(){
return super.toString();
}
} |
| Kotlin |
class MainActivity : AppCompatActivity(){
override fun onCreate(savedInstanceState: Bundle?){
super.onCreate(savedInstanceState)
setContentView(R.layout.activity_main)
}
fun main(args: Array<String>){
println("Hello World")
}
override fun toString(): String{
return super.toString()
}
} |
