Questions tagged as 'java'

Tagged questions
0
answers

How to create a white bitmap from an array of bytes?

I am working on android and I want to create a white bitmap from an array of bytes but I do not know how it is done, for the moment I have tried this byte[] bytes = new byte[10000]; for (int i=0;i<bytes.length;i++){ b[i]= 0 &...
asked by 08.07.2018 / 01:32
1
answer

Spring boot, 1 problem was encountered while building the effective model

I'm new to spring boot and I have a question. When I start a new maven project, in "Spring tool suite", I find this error in my POM.xml    "1 problem was encountered while building the effective model [FATAL]   Non-parseable POM   C: \...
asked by 17.07.2018 / 02:16
0
answers

ignore different data type in Jackson

@JsonIgnoreProperties(ignoreUnknown = true) public static class MessageRS { private String errorCode; private String description; private DATA DATA; public MessageRS() { } public MessageRS(Str...
asked by 17.07.2018 / 17:57
0
answers

Pass a string obtained with javascript to php

I have a processing Sketch embedded in an html, this through a JavaScript request, it gives me a string "serie=11&temp=22" , I need to send that to a php file within the same directory. I can not get anything sent. <!DOCTYPE ht...
asked by 16.08.2018 / 21:42
1
answer

How can I make the while work for me?

It does not work directly for me, it does not print anything, I can not find the error. The statement of the program is as follows: Given the grades and names of students in a course, print the names of students whose grade is greater than 7...
asked by 16.08.2018 / 13:05
1
answer

Spring and Angular 4 - Generate Blob or Base64 Files

Sorry for the inconvenience, I hope you can help me with my question! I'm developing on a platform that in front has Angular 4 and the Back is Spring , In the front I use a npm that is called pdf make...
asked by 09.07.2018 / 15:17
1
answer

PasswordEncoder mapped for the id "null"

I'm doing the CORS in SpringBoot and I've had a series of problems that I solved by importing 1 dependency. The pom.xml: <!-- Spring Boot --> <dependency> <groupId>org.springframework.boot</groupId...
asked by 04.07.2018 / 06:59
1
answer

I need to know the type of class [duplicated]

Hi, I have this problem, I have a method that recives a Class class and I need to know what is it to know if I execute a method, please I need to know what method I can compare the class to if it is an instance of another static public void...
asked by 03.07.2018 / 17:02
1
answer

JDBC Error: "Exception in thread" AWT-EventQueue-0 "java.lang.NullPointerException"

I am trying to create a simple Java program that can register, query and modify data from a database in MySQL. The program itself compiles me well, but when sending the Query, I miss this error: Exception in thread "AWT-EventQueue-0" java.lang.N...
asked by 14.07.2018 / 21:43
1
answer

I need to print from my executed program as a Windows service

I have a program created in Java that gets a PDF and prints it. To print it use ghostscript: public static void print(String nomImpresora, String rutaNombreArchivo, int cantVia) throws Exception { String cmd; cmd = "gswin64c -dPrinted...
asked by 13.07.2018 / 15:20