Java
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Java – find the largest palindrome made by the product of two 3-digit numbers
package testing.project; package testing.project; public class palindromeThreeDigits { public static void main(S…… -
Java – how to display ProgressDialog when using salvo for network operations
I work on an Android application and I am very interested in using the volley library to perform network HTTP calls Bu…… -
Understanding generic types in Java
I have a general class that says: @H_ 404_ 8@ @H_ 404_ 8@ MyClass<T>@H_419_12@ 在这个类的方法中,我想测试T的类…… -
Char range in Java
The following line of Java code generated an error char c = -128; Solution Char is a data type that is not signed in J…… -
Java – 2D ArrayList
This is just a very small problem... I seem to have encountered too many complex problems: I have to implement an inde…… -
Java – exception: add a window to the container How?
I have a jdialog class called preferences This class creates a constructor, such as: class Preferences extends javax.s…… -
Java – can the kernel be written in assembly language?
I've never done kernel programming I am an excellent programmer of Java language and often use it Now I want to do som…… -
In Java, which is the most recommended class for dictionary data structures?
I need a data structure to store users that should be retrieved by ID Solution It may depend on how many users you pla…… -
Java – how to get parameters from the URL in Liferay portlet?
I used something like feed in Liferay 6 JSP of out of the box portlet such as jspf: String articleId =null; HttpServle…… -
Java Naming Convention
I've been studying Java hard for the past week, and so far I've been able to generate reasonable code However, I seem …… -
Java – search the scala list to find what matches the attribute
What are the usual Scala methods? I have a list. If I find something that meets certain conditions, I want to return "…… -
Java – return statement in void method
I have the following method to return void. I need to use it in another method that also returns void @H_ 403_ 9@ @H_ …… -
Java and python ^ operators
For the CompSci class, we are looking at the Java math class As my stupid programmer, I try to use the ^ operator inst…… -
Java – how do I create a GUI in Android instead of using XML?
I don't like managing XML and Java together. Can I use the Java language to create the same GUI? Solution Yes, you can…… -
Java – Android replaces multiple characters from a string
I know it may be an amateur problem, but for some reason, I don't remember how to do it String s ="["; String q ="]"; …… -
Java generic problem
Can I write a method that can create an instance of any specified type? I think Java generics should help, so it might…… -
Java – when comparing two equal integers in a while loop, does the equal operator fail?
I post two examples below Example 1: Integer myVar1 = 42985; Integer myVar2 = 1; while (true) { if (myVar2 …… -
Java – abstract classes cannot be implemented from other packages
For some reason, I can't seem to implement an abstract class outside the package that defines it Abstract classes in P…… -
Java – how to get parameters from the URL in Liferay portlet?
I used something like feed in Liferay 6 JSP of out of the box portlet such as jspf: String articleId =null; HttpServle…… -
Short condition, Java
I want to test whether the current char is', ',' – ',' Or‘‘ if((current != ' ') || (current != '.') || ...) Any ideas?…… -
Use the string comparison in Java again
Novice problem, but I have this Code: import java.util.*; import java.io.*; public class Welcome1 { // main meth…… -
JavaFX Maven plug-in and API are incompatible
I recently upgraded my java version to 7u40. 0 on my Fedora 19 Then I started to make a nasty mistake in the JavaFX pr…… -
Java – MD5 is the letter of each password worth it?
to greet, I am currently developing a project involving login system, which aims to set up as safely as possible What …… -
Java – JPA / eclipse link – retrieve column names
I'm trying to update my java knowledge because I was last in 1.4 When used in version x... I'm trying to use 1.6 0, es…… -
Failed: metadata error: Java Lang.runtimeexception: unable to instantiate org apache. hadoop. hive. metastore. HiveMetaStoreClient
I closed my HDFS client while HDFS and hive instances were running Now, when I re-enter hive, I cannot perform any DDL…… -
Dynamic array in Java
What I want to do is ... int sum[]; ... for(int z.....){ ... sum[z] = some_random_value; ... } But it gives a…… -
Java – Oracle – pool connected to spring framework
We are trying at @ L_ 301_ Implement Oracle connection pool with the help of 0 @ framework We are using the DBCP conne…… -
String operation in Java
I asked the following two questions in an interview yesterday 1 GT; Given a string, calculates a new string in which a…… -
Java – scanner class hasnextline infinite loop
Why does this code enter an infinite loop when I try to give it a basic text file? import java.io.File; import java.io…… -
Java – Method println (int) in printstream type is not applicable to parameters (string, int, int, int)
public static void main(String[] args) { public static void main(String[] args) { int num1 = 1; int num2 = 1; …… -
Is the result of mathematical operation on Java – double completely repeatable?
I have a complex data processing algorithm, using java 8 and double as the data type Given the same input (hundreds of…… -
Java 8 avoids a large number of if / else statements
I have something that looks like this: public boolean isValidObject(SomeObject obj){ if(obj.getField() == null){ ……