Questions tagged as 'java'

Tagged questions
1
answer

Reading Java XML

I'm trying to read an XML in Java to get data from an NF-e. I tried this way to try to get only the product code to test more without success: public void testeaa(String xml) throws DocumentException { Document document = getDocumento...
asked by 31.08.2018 / 22:31
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Method using thread and JAVA inheritance

I'm trying to create a class BallField that receives attributes from the parent class Ball, the ball class has the attributes private int ar = 100; //100% private boolean furada = false; Ball class (no imports): public class Bola { p...
asked by 08.10.2018 / 01:28
2
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Return False or True

I need to know if the second number is a multiple of the first number, if yes return TRUE otherwise FALSE, I am not able to declare the Boolean library. package br.fatec.com; import java.util.Scanner; public class Mult { public static...
asked by 26.08.2018 / 14:08
1
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How to display a Menu by clicking the BottomNavigationView item

My application looks like this: IneedwhenIselectthefourthitem,amenuappears: The code for my Activity Main: package br.com.friendlychat.navigationbottombar; import android.os.Bundle; import android.support.annotation.NonNull; import a...
asked by 16.08.2018 / 19:04
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How to do the unit test of Spring Boot insert the data in the Bank?

I created a simple system that is working perfectly, but I need to implement a unit test in Spring Boot, which happens when I test or I can not enter the data in the database or it generates error; I tried this way, did not generate error, bu...
asked by 19.09.2018 / 14:32
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Problem in displaying results in label in java [closed]

package cursoemvideo; /** * * @author DANIEL */ public class TelaCalculadora extends javax.swing.JFrame { /** * Creates new form TelaCalculadora */ public TelaCalculadora() { initComponents(); pnpPainel.set...
asked by 18.09.2018 / 19:12
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How to trigger page in case of error in web.xml JAVA

I need to trigger an error page in case of exceptions. I put this code in web.xml : <error-page> <exception-type>java.sql.SQLException</exception-type> <location>/Casa da Borracha/erro.xhtml</location&...
asked by 10.08.2018 / 19:41
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I want to compile java but I can not [duplicate]

I already installed JDK, JRE, put td q had to put in the path. the javac is working but when I give the command "java HelloWorld" the following error is displayed: "Error: Could not find or load main class HelloWorld.class". package java;...
asked by 15.09.2018 / 19:35
3
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Store multiple numbers in a variable and then print and show the sum

I need to do a program that does the following: • Start with an integer N • If N is even, divide by 2; • If N is odd, multiply by 3 and add 1; • Repeat this new process with the new value of N, if N ≠ 1; • Ends the process when N...
asked by 30.08.2018 / 03:08
2
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Exporting an .xlsx with Java

I'm trying to export a spreadsheet with Java, specifically a .xlsx file, but I'm not getting it. I'm doing it this way and it's working, but it only works by putting the extension .xls : HSSFWorkbook workbook = new HSSFWorkbook...
asked by 10.10.2018 / 17:36