Questions tagged as 'java'

Tagged questions
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Add polynomials, TAD Polynomial, Java

Hi, you can help me create the sum method to add two polynomials. Given a polynomial P (x) = a0 + a1x + a2x2 + a3x3 + ... + anxn, I have an iPolinomio interface (which is given in the exercise and I can not modify it), which is the following p...
asked by 24.01.2018 / 18:13
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optimize reading and inserting records from a .txt to sql in Java

good morning companions I have a code that is responsible for processing a .txt file and inserting it into a SQL database; all this in java using netbeans my code is as follows: String line = null; int exito=0; int numeroBatch=0; int...
asked by 23.01.2018 / 17:29
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Restart - Clear stack Android

The stack of a mobile application, once it arrives at the "Home", starting with the "start", once I have made a number of activities, which would be the right thing to do: Send it back to HOME by means of intents , or have to do a...
asked by 10.01.2018 / 14:17
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Web Service HTTP 404

This is the first time I have made an attempt at WebService, I am working with Eclipse, and I have the following class: @Path("/AltaCliente") public class WebServicePushNotifications { @POST @Path("/alta") @Produces("text/plain")...
asked by 09.02.2018 / 15:34
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How to refresh an item N minutes in a Recyclerview?

I have a list of objects with a field that shows the elapsed date, ie "right now" "1 minute ago" "2 minutes ago" etc ... Who is interested is the following: link Now I compute it in onBindViewHolder of the adapter, but of course i...
asked by 05.02.2018 / 19:33
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.jasper pdf does not look the same running from java

Design a report with ireport designer 5.6.0, but do not see it in one way from ireport and another when it is generated from a jsf app, initially add the sources of ireport to the project and solve the problem with the bold, but the font sizes a...
asked by 22.12.2017 / 14:23
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java.lang.NullPointerException in EntityManager

I'm starting to develop with Spring MVC and hibernate. The system is displayed correctly but I get the following error trace: Advertencia: StandardWrapperValve[dispatcher]: Servlet.service() for servlet dispatcher threw exception java.lan...
asked by 13.12.2017 / 23:27
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Warning when compiling form in Java

Hello, good night Today I bring you a problem to see if you could help me with this warning that JCreator Pro gives me when compiling my Java program Note: C:\Users\JosePadron\Documents\JCreator Pro\MyProjects\SistemaFacturacion\formulario...
asked by 14.12.2017 / 00:36
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Files, take out the products in alphabetical order and the most sold in capital letters

Good, I have the following problem: Given the following file: ventas.txt platanos 5 fresas 8 fresas 3 arandanos 10 peras 2 platanos 1 Remove the products in alphabetical order, accumulated and the best sellers in capital letters. Example of...
asked by 13.06.2018 / 21:20
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Mix two arrays in one (three in three). Java

I need to mix two arrays into one whose lengths we insert and fill with randoms. The question is that I have to mix them in the following way: three first of the first array, three first of the second array, three of the first array, three of th...
asked by 02.12.2017 / 13:19