The email gets sents only to the last email address in the String[] to array. I’m intending to send to all email addresses added to the array. How can I make that work? Answer You have the choice to use the following 4 methods. I have provided examples of the two methods useful in this case. I have cons…
Tag: java
Criteria Restriction by date field
I have 2 tables, Partner and Visit. A partner can have many visits, also various in same day. I need to create a Criteria restriction to know how many days the Partner has visits since a given date. So, 2 or more visits in same date must be only one. Can this be done only by Criteria and Restrictions?? I
Pass an argument that starts with ‘@’ to jcommander
I am using JCommander(version 1.32) to parse command line arguments passed to a java application(let’s call it app). The problem I have is that one of the arguments I need to pass begins with @ and as can be seen here there is a special syntax for @. Thus calling the app with app @arg fails with Could n…
How to construct a custom JSON error response using the Struts 2 framework
I am working on creating a web application using Struts 2. I want to send out JSON error response like the below when the request URL is not well formed: I am already using the struts2-json plugin for serializing response objects using JSON. How should I go about sending JSON error responses. I can think of t…
Eclipse Java debug mode: how to get actual type of value?
The variable view of Eclipse Java Debug mode allows to inspect the values of variables. If the type of a variable has several sub-types, how to find out the actual type of the value? Eclipse …
Increase resolution of java screenshot
I am using the following code to take a screenshot in Java: This code works, but the screen shot outputted is fairly low resolution. How can I increase the resolution of the screenshot? Answer There is nothing wrong with this code. I have a screen resolution of 1680×1050 pixels, and the generated png fil…
Cannot start this animator on a detached view! reveal effect
I’m trying to create the reveal effect in my application but without success. What i want is reveal a cardview when i open a fragment. What i tried so far is: and in the onCreateView i started the method: this is the cardview: and the logcat: Checking, seems that getWidth() and getHeight() returns 0. Bu…
Why Java locales are not constants?
Java supports the Locales shown in this link. But I can’t figure out why only some countries such as France, Canada, China and United States and some languages such as Italian, Japanese and German have constants for their locales. Everytime a need a locale, I consult the table of supported locales and d…
Having Listener in new Thread
I’m trying to place my KeyListener in a new Thread called Keys in my project because my main thread is already in a loop. So I want this method to return a boolean if the key is pressed or not. I’m pretty new to Java so sorry if that is just a dumb mistake. Thread: I would appreciate an example.
Knight’s Tour random move picker not working
I am working on randomizing which move my knight takes in my knight’s tour code. For some reason though, my switch statement always goes to default, instead of executing a possible move. I know my possible moves methods work because I have separately ran firstMoveChoice() on it’s own and it worked…