java

[Solved] How to make a magnetic feild intensity measurer app in Android – Java [closed]

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If you want the values of all axis from the Magnetometer this will do it. (By default the values is in microTesla) public class MagnetActivity extends AppCompatActivity implements SensorEventListener{ private SensorManager sensorManager; sensorManager = (SensorManager) getSystemService(Context.SENSOR_SERVICE); @Override public void onSensorChanged(SensorEvent event) { if (event.sensor.getType() == Sensor.TYPE_MAGNETIC_FIELD) { int x_value = event.values[0]; int y_value = event.values[1]; … Read more

[Solved] What is the best way to have a banner that slides just below my search bar? [closed]

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Assuming you want something like sliding images, if that is it I think you’re looking for a ViewPager You can add your content to the ViewPager. For them to automatically keep swiping you can try something like this or this. This piece of code-block would achieve the same: viewPager = (ViewPager) findViewById(R.id.viewPager); PagerAdapter adapter = … Read more

[Solved] #JAVA – Programme calculates the sum of numbers from 1 to 10,000 (including 1 and 10,000) omitting numbers numbers whose hundred digit is 2 or 3 [closed]

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You can use modulus to find the last 3 digits and then check that with your condition. public printNum() { int num = 0; while (num < 10000) { num++; int last3Digits = num % 1000; if (!(last3Digits >= 200 || last3Digits <= 399)){ System.out.println(num); } } } Hope this solves it 3 solved #JAVA … Read more

[Solved] Algorithm for a Recursive function for a ArrayList and when a arrayList is empty return the exact array [closed]

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If I understand correctly what you’re asking, something like this should satisfy it, but please note that recursion is not really the best way to achieve what you’re apparently trying to do: public static void count(ArrayList<Double> list) { if (list.empty()) { return; // or consider using if/else } double total = total(list); if (total>100) { … Read more

[Solved] JDBC Optimisation of query [closed]

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JDBC doesn’t optimize database queries. A specific JDBC driver might do query optimization, but it is likely that query optimization is done by the backend database. (Many / most worthwhile optimizations require knowledge of the tables that the JDBC driver does not have.) Another question what is the difference between analyse and compiling query in … Read more

[Solved] Unable to get the right output for average number

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When you do Board o= new Board(); inside getRow, you are making a new board with (presumably) row at zero. It is not the same board that you construct in main and set row to 10. To pass board from main into getRow, add it as an argument: private static int getRow(Scanner c, Board o) … Read more

[Solved] my app crashes when I start a new intent

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You lambda convention for intent is correct. You should not use JACK for now as it now deprecated or replaced in android studio 2.4 preview https://android-developers.googleblog.com/2017/04/java-8-language-features-support-update.html Or you can also Use retrolambda if you want as jack is not supported with databinding. For your question: my main question here is, what might be causing this … Read more

[Solved] I keep getting java.lang.String com.google.firebase.auth.FirebaseUser.getUid()’ error although it has already confirmed they is a user

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I keep getting java.lang.String com.google.firebase.auth.FirebaseUser.getUid()’ error although it has already confirmed they is a user solved I keep getting java.lang.String com.google.firebase.auth.FirebaseUser.getUid()’ error although it has already confirmed they is a user

[Solved] Add space between two characters in Java [duplicate]

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A simple way can be to split the string on each character and join the parts using space as the delimiter. Demo: public class Main { public static void main(String[] args) { String s = “AB”; s = String.join(” “, s.split(“”)); System.out.println(s); } } Output: A B solved Add space between two characters in Java … Read more

[Solved] How can I define something and save it in HashMap

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You can define Ingredients as a class below: import java.util.HashMap; import java.util.Map; import java.util.Set; public class Ingredients { private Map<String, Double> aIngredientTypeToCost = new HashMap<>(); public void put(String theType, Double theCost) { aIngredientTypeToCost.put(theType, theCost); } public Set<String> getAllIngredientsType() { return aIngredientTypeToCost.keySet(); } } then in the main class you can create a map of type … Read more