I have an List, with Strings like: Now i would like to get the Index Number for the Substring “One”. How can i get this? I only could make it if i convert it to an Array and then: Isn’t there a way to search for the Substring without converting it to an Array? Answer List already contains in…
Tag: java
Android – Running a background task every 15 minutes, even when application is not running
I need to build a background task that runs every 10/15 minutes (doesn’t really matter, either is good), even when the application is not running. How can I accomplish this? I can’t seem the wrap my head around this. I read I could use some sort of runnable() functionality or use a background serv…
In Java, how to traverse two lists at the same time?
E.g. suppose we are sure that list1.size() equals list2.size(), how to traverse these two lists in one for statement? Maybe something like for(String str1 : list1, str2 : list2) ? Answer
What’s the difference between JPA and Spring Data JPA?
I am a bit confused about the difference between Spring Data-JPA and JPA. I know about JPA that it is a specification for persisting the Java Objects to a relational database using popular ORM …
How do I run a Java program from the command line on Windows?
I’m trying to execute a Java program from the command line in Windows. Here is my code: I’m not sure how to execute the program – any help? Is this possible on Windows? Why is it different than another environment (I thought JVM was write once, run anywhere)? Answer Source: javaindos. Let…
PageOutputStream causing java.lang.OutOfMemory
We have a struts2 web application running in Tomcat 7 that is intermittently experiencing the same problem: Application operating perfectly normally After a variable amount of time (anywhere from 10 minutes to 7 days) the application slows down to a halt Multiple java.lang.OutOfMemory errors in catalina.out L…
How to make a splash screen for GUI?
Hi there I’m new to GUIs in Java and was trying to make a splash screen or an image appear for 3 seconds. Then after that it it will go onto my main program. Does anyone have an ideas how to do this or can link me to any tutorials? So far I have done this but not sure where
hasPrevious() Method not working
I don’t understand why my hasPrevious iterator is not functioning, it looks like this: I have another function using hasNext() and it works, but this one will not. I am not sure if this method is no longer in existence or not, but when I look into it, Java websites speak of it. I don’t understand …
How to use blueimp jQuery file upload: Empty file upload result in Struts 2, fileitems are empty
I am using Blueimp and server side is Java, Struts2. I couldn’t find examples using Java, anyway I managed to use the sample code, but I am getting “Empty file upload result” when I am trying to upload a single file also. The HTML part is the same, I am not pasting here as it may go lengthy.…
How to pass two objects to use in a form using thymeleaf?
My problem is the following : I’ve 2 differents objects that I’ve to fill from a single form. With 1 object, I simply do in the newFoo.html: and in the FooController: Let’s say I’ve an other object bar with a “status” variable in it. How can I do to pass that object so I ca…