implement method in java and android

Here's an example of a method that takes two integers as parameters and returns their sum:

public int sum(int a, int b) {
    return a + b;
}

To use this method in an Android app, you can create a new class (let's call it MathUtils) and add the method to it:

public class MathUtils {
    public int sum(int a, int b) {
        return a + b;
    }
}

Then, in your Android activity or fragment, you can create an instance of the MathUtils class and call the sum method:

public class MainActivity extends AppCompatActivity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        MathUtils mathUtils = new MathUtils();
        int result = mathUtils.sum(2, 3);
        Log.d("TAG", "Result: " + result);
    }
}

In this example, we create an instance of the MathUtils class and call the sum method with the integers 2 and 3. The method returns 5, which we then log to the console using Log.d.