Send data on click startActivity(new Intent(vContext, OtherActivity.class).getIntExtra(“number”, itemData)); How to get data int pos = getIntent().getIntExtra(“number”, 0); solved How To Save And Display Int In Another Activity?
You are trying to remove item from list, that you currently iterating on, thus, ConcurentModifiacationException occures. See here: https://stackoverflow.com/a/18448699/8851887 solved Java Integer ArrayList [closed]
Based on the logcat output that you have provided, the first thing you need to address is the fact that your mMap variable is null. My guess is that you’re either calling displayLocation() before the onMapReady(…) callback has fired, or your class isn’t equipped to handle the callback at all. If you’re using the Google … Read more
You’re initializing the variable myChar as type char, but trying to fit a String inside. Java uses double quotes (“”) for Strings and single quotes (”) for chars. To fix this is simple: char myChar=”\u00A9″; The single quotes make ALL the difference! solved incompatible types required char found java.lang.string
Well, Your app is crashes because of java.lang.RuntimeException:java.lang.NumberFormatException: Invalid double: “” that means you are trying to convert empty string to Double. So, Because the EditText is empty your app is crashes and I have re-write your code so that you can copy-paste. Here is your MainActivity.Java package com.blogspot.techtutorialsajen.androiddevelopmentpractice; import android.support.v7.app.AppCompatActivity; import android.view.View; import android.widget.Button; … Read more
The first one is a valid array declaration. The second one has an incorrect reference type. In the third one, you cannot create an object of type List as it is an interface For the last one, it’s ArrayList, not Arraylist. List[] myList2 = new List[5]; List myList5 = new ArrayList(); solved Which Lists will/won’t … Read more
The code calculates a number of even numbers (evenCount) and odd numbers (oddCount) in the array. Every two even numbers make a pair that gives an even number in sum. The number of such pairs is evenCount * (evenCount – 1) /2. There is evenCount ways to select the first even number, evenCount – 1 … Read more
System.out.println(“”+4+2); -> 42 Because first you are adding and empty string and a int value. Result will be a string. Then you are adding an another int to that string. So it will concatenate the just string representation of value to the previous string and output 42 System.out.println(4+2+””); -> 6 Here you are first adding … Read more
That is a recursive method that just calls itself. It creates an infinite loop. 3 solved What does “def loop: Boolean = loop” do in Scala
Without actual code: iterate thorough the array count the 1s you found if you found a 0 then start over the count check after increasing the counter: if the counter reaches 3 then return with true if you reached the end of the array and no more elements then return with false Something like this, … Read more
import org.json.JSONObject; …… String jsonStr = “{‘my_hobbies’: … }”; JSONObject jObj = new JSONObject(jsonStr); solved How to build Java JSONObject from JSON [closed]
Collections.rotate will do that you want String[] daysArr = { “Mon”, “Tue”, “Wed”, “Thu”, “Fri”, “Sat” }; List<String> daysList = Arrays.asList(daysArr); String input = “Fri”; int index = daysList.indexOf(input); if (index > 0) { Collections.rotate(daysList, -index); } System.out.println(daysList); Hope it helps! solved How to arrange the datas to display in array by given string of … Read more
largeHeap = “true” does not increase the heap size to or by 64 MB: Most apps should not need this and should instead focus on reducing their overall memory usage for improved performance. Enabling this also does not guarantee a fixed increase in available memory, because some devices are constrained by their total available memory. … Read more
To make this question clear, I suggest you to read about Java Reference/Object & method override first. Below are the description of every steps in your code: You create a new instance of Class”B” and a reference P pointing to it: You create anoher reference Q and also pointing to above object: But pay attention, … Read more
Simply throw-catch an Exception such as proposed ArithmeticException or create your own: try { if(num2 == 0){ throw new ArithmeticException(); } } catch (ArithmeticException e) { System.out.println(“Please input another integer than zero”); } solved 0 cant be divided using try and catch java [closed]