Devansh-Maurya

class A {
  //...
}

//class B inherits class A
class B extends A {
  //...
}

//class C inherits B, which in turn, inherits A

Devansh-Maurya

final class A {
  //...
}

//The following class is illegal
class B extends A { // ERROR! Can't subclass A
  //...
}

Devansh-Maurya

protected void finalize() {
  //finalization code here
}

Devansh-Maurya

class A {
  final void meth() {
    System.out.println("This is a final method");
  }
}

class B extends A {
  void meth() { // ERROR! Can't override.
    System.out.println("Illegal!");
  }

Devansh-Maurya

Intent intent = getIntent();
currentPetUri = intent.getData();

if (currentPetUri == null) {
    setTitle("Add a new pet");
} else {
    setTitle("Update pet data");
    // Initialize a loader to read the pet data from the database
    // and display the current values in the editor
    getLoaderManager().initLoader(EXISTING_PET_LOADER, null, this);

Devansh-Maurya

FloatingActionButton fab = findViewById(R.id.fab);
fab.setOnClickListener(new View.OnClickListener() {
    @Override
    public void onClick(View view) {
        Intent intent = new Intent(CatalogActivity.this, EditorActivity.class);
        startActivity(intent);
    }
});

Devansh-Maurya

ListView petListView = findViewById(R.id.list);

petListView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
    @Override
    public void onItemClick(AdapterView<?> adapterView, View view, int position, long id) {
        Intent intent = new Intent(CatalogActivity.this, EditorActivity.class);
        Uri currentPetUri = ContentUris.withAppendedId("content://com.example.android.myapplication/pets", id);
        intent.setData(currentPetUri);
        startActivity(intent);
    }

Devansh-Maurya

ContentUris.withAppendedId("content://com.example.android.myapplication/pets", id);