I’m actually in need of waiting for the ui thread to execute a runnable before my application thread can continue. Is the wait()/notify() way a proper way to do it or is there something better for this? What I’m actually doing looks like this: Also when I do this I have to be sure that the thread …
Tag: java
How to transfer data from one activity to another in android
It might sound simple but I can’t make it working. I have two activities. Which first one is a form, and second one is showing data from a JSON file based on values entered in the first activity. So I am trying to make a simple version of it. I have a EditText, and a button, so when they press
how to add button click event in android studio
So I have done some research, and after defining you button as an object by the code here is my problem then your OnClick() event… Problem: When I type in the “this”, it says: I have no idea why? here is the code from the .java file Answer SetOnClickListener (Android.View.view.OnClickListene…
Convert Decimal to Hex using Recursive method Java
I need to make a recursive method that converts a decimal into hexadecimal. I can’t use Integer.toHexString. EDIT:I tried this code but it doesn’t work properly Edit: Changed the default case and the if (n == 0) loop return statement and it works beautifully now. new code: Answer The problem is in…
android : Check EditText is null
i want to check and give condition to my edittext, if i input something to my edittext, l it will change my imageview, this is my code: i have problem here, my imageview not change…. is this code has true or not? Answer If I read your post correctly, you want to check if the EditText is ever empty as
Security Framework for Java Swing Applications
Is there a security Framework available for Java Desktop Applications? When I searched on google I saw persons talking about Spring Security, however it seems to be chiefly web-based. I have been using ordinary java code(Login forms, jdbc) to implement User Level security but I am not comfortable programming …
How to avoid NullPointerExceptions from boxed type arithmetic in Java?
Given the following: The requirement for my use case is that result should be null whenever either operand is null (and the same applies for other operators). I know I can use an if statement to do this but is there a smarter way? Answer The best way is not to use Boxed types for normal arithmetic operations.…
How to get all the dates in a month using calender class?
Here I want to display dates like I can get total days in a month Does anyone have an idea to help me? Answer If you only want to get the max number of days in a month you can do the following. If you actually want to print every day then you can just set the day of month
404 error when referencing fileUpload interceptor in Struts 2
I am using struts.xml file which is described below : It was working before I added the last action upload. When I start the server it is showing me the 404 error. Can somebody help me out in resolving the issue. I am feeling that the issue is due to <interceptor-ref name=”fileUpload”>. Answ…
If without else ternary operator
So far from I have been searching through the net, the statement always have if and else condition such as a ? b : c. I would like to know whether the if ternary statement can be used without else. Assuming i have the following code, i wish to close the PreparedStatement if it is not null (I am using