Java
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2D array problem Java
If I have a 2D array arr [rows] [columns], how can I find the size of rows and columns respectively with arr.length? S…… -
Java – unconditionally execute tasks in ant?
I'm trying to define the task of sending (using echo) messages when the target completes execution, whether the target…… -
Java – sample programs are required to throw interruptedexception
I'm going through Chapter 9 (threads) of Kathy Sierra scjp 1.5, which is mentioned: I just need a sample program to kn…… -
Java – you can specify an integer value for char, but you cannot assign an integer variable to char
Why not compile the following code int n = 5; char c = n; But the following compilation char c = 5; In both cases, don…… -
Display graphics – free Java library
See English answers > drawing graphs on Java [closed] 6 Solution There is an open source version of JGraph -
How to convert TIF to PNG in Java?
What is the best way to convert TIF files to PNG in Java? Simplicity is desirable, but if the easiest way is to use a …… -
Qualified variables for garbage collection in Java
I was preparing for ocpjp, and I was trapped in the following mock exam questions: Whereas: 3. interface Animal { void…… -
Java – when to use doget, dopost, and service
See English answers > doget and dopost in servlets5 >Dopost has no limit on the number of parameters, while doge…… -
How do I change the background color of jtabbedpane?
I know you can modify the LAF properties, but if you don't, how can you do it? I'm just asking, because setbackground …… -
Java – missing twitter4j authentication credentials
I want to use Twitter 4J to tweet in my android app This is my code: //TWITTER SHARE. @Click (R.id. img_btn_twitter) @…… -
How to use guava predictions as a filter in the Java 8 stream API
Guava predictions cannot be used as a filter for the Java 8 streaming API For example, this is not possible: Number fi…… -
Java – Functional Programming: how to handle exceptions or their equivalents in functional programming
Let's say I have the following code public int divide(int dividend,int divisor) { if( divisor == 0 || (dividend ==…… -
Java – the scanner did not scan my input
I'm trying to read a line and then enter the if statement But it will terminate after the first input of red import ja…… -
ActiveX from Java applications?
Can ActiveX controls be easily embedded in Java applications? Is it worth it In my next project, I should use existing…… -
Java – how do I access the configuration files in the jar?
I am using flatpack to parse and load data in flat files This requires loading the configuration file that stores the …… -
Java – why are variables allowed to be declared in a for loop?
I'm a student. I'm learning java at school. I'm confused about it That's what I mean: for (int i = 0; i < 3; i ++) …… -
Convert int to object in Java
I have a problem: I work in an eclipse environment Sometimes the computer does not give the following conversion: int …… -
Java – JPA criteriabuilder upper gives a compilation error
I am trying to use criteriabuilder for case insensitive queries, as described in Hibernate JPA criteriabuilder ignore …… -
Java – a regular expression used to split a German address into its parts
Good evening, I tried to split the parts of the German address string into its parts through Java Does anyone know reg…… -
java – Quartz StatefulJob / non-StatefulJob
Can you explain to me the exact average value of statefuljob in quartz, which is different from that without statefulj…… -
Java – how to set a custom object in the JTable line
I should first tell it that this is not about rendering table cells This is the tablemodel I'm building using a 2D arr…… -
Modifying private instance variables in Java
See English answers > java private field visibility6 public class Account { private String name; private do…… -
JavaFX changelistener is not always valid
I have a JavaFX application and have a concurrent task there Because the binding does not append new text to the texta…… -
How to get the logical part of a sentence in Java?
Suppose there is a sentence: On March 1,he was born. Change it to He was born on March 1. Without breaking the meaning…… -
Java – find non-public elements between two arrays
In an interview, people were asked to find unusual elements between two string arrays Eg: String a[]={"a","b","c","d"}…… -
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How do I get string values from ArrayList and store them in a comma separated single string in Java 8?
I have an ArrayList with some strings I want to store the list of numbers in ArrayList in a single string separated by…… -
Java – parse byte array containing unknown length field
I parse a byte array with the following specifications in Java: Trace data format: - 4 bytes containing the Id. …… -
Java – Maven version cannot be changed in the eclipse ide
There was no MVN package inside eclipse, but after success in the terminal, I realized that eclipse was running Maven …… -
Why are Java generic type parameters not implemented at run time?
My understanding is that C # and Java differ in some aspects in terms of generics. One of them is that generic type pa…… -
Java – print a string from ArrayList of string []?
I have an ArrayList of a complete string array. I build it as follows: String[] words = new String[tokens.length]; My …… -
Assembly – do you have to pop an error code pushed onto the stack by some exceptions before returning from the interrupt handler?
I have loaded an IDT table with 256 entries, all of which point to similar handlers: >Push exception numbers for ex……