Java
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Java – Comparison of two strings
I have the following code: int t = s.length()-1; int g = 0; for (int i=0; i < s.length(); i++){ i…… -
JPA criteriabuilder case query
Can anyone provide an example of how to write a case query using criteriabuilder? Solution The following is a sample c…… -
Java – is resultset thread safe
Is resultset thread safe? My problem arises because in my program, I have used different statements for each query. I …… -
Java inheritance and composition (implementation stack)
I want to implement a stack in Java (using list interface: interface list) I want to implement it in two different way…… -
Java – JDBC and threads
I have a program that needs to query the database within a given time interval, perform some operations through the re…… -
Using XML as a database in Java
I want to use an XML file as a database I want to store the ID and its corresponding string path Like: <item> …… -
Java – how to convert a floating point number to the nearest fraction represented by a byte numerator and denominator?
How to write an algorithm that gives floating-point numbers and try to express them as accurately as possible using nu…… -
Java – add segment independent text to legend in JfreeChart piechart
Is there any way to include some arbitrary text in the legend in JfreeChart piechart? I know that a piesection label g…… -
Java – SmartGWT: can I color a row in the list grid?
All can color a row in SmartGWT listGrid? Solution In SmartGWT, methods ending in style (such as GetStyle, getbasestyl…… -
Java – internal classes that use the main method cannot be compiled
abstract class Manager { abstract class Manager { static void test() { System.out.println(12); } …… -
Java – solve problems larger than memory limit
I've been thinking about the following scenario recently: suppose you have a huge database and you want to perform som…… -
How to parse time in Java?
I want to know whether Java has a built-in method for parsing time / date, as shown below: 5m1w5d3h10m15s This is 5 mo…… -
January 31 of java calendar
I have the following code: – Calendar calc = Calendar.getInstance(); SimpleDateFormat sdf = new SimpleDateForm…… -
Java – JTable does not display column headers
This is my first time using GUI, so I'm not sure what caused the problem My uni mission The project aims to develop a …… -
Java – check string contents
I need to perform the following checks: If mystring contains() Any other character Letters A-Z, A-Z, "_, "–", numbers …… -
Why does my java code execute bash commands incorrectly?
I tried to make my java program interact with Linux bash, but something went wrong I have a simple executable prog tha…… -
Java – which JRadioButton to select
I have several jradiobuttons in the button group private ButtonGroup radioGroup= new ButtonGroup(); private JRadioB…… -
What is the guarantee of generic drugs in Java?
Although I know, generics are used to make our code more general and flexible But what is the guarantee of cast iron i…… -
Java – how to wait for all callables to complete execution before continuing?
I have the following hash code: public class MyCallable implements Callable<Long> { @Override public Lon…… -
How to return values from methods that contain arrays in parameters in Java?
I have this code, but it doesn't work! public class Trial { public static void main (String [] args) { …… -
Java – create viewholder final in custom listview adapter Android
I have a listview with such a custom adapter @Override public View getView(int position,View convertView,ViewGroup par…… -
The difference between void foo (t y) and void foo (t y) in Java generic classes
Explain in detail the differences (if any) between the following two versions of Java generic classes? class C<T>…… -
Java – the best string technology equals comparison
If the block is better? private static void checkStr(String str) { if (str.equals("exit")) { System.out.p…… -
Java Swing – perform actions on clicks
I think I've written myself into a corner I'm trying to do this with Java swing Click the next button to load a new li…… -
Java – JPA criteria API select object with null column
I have a table "word" in PostgreSQL DB: CREATE TABLE word ( word_id bigserial NOT NULL,word character varying(15) N…… -
How to run from Java SH file?
See the English answer > how to run UNIX shell script from Java code? 16 Runtime.getRuntime().exec("src/lexparser.s…… -
I need a basic simple java layout method
I have checked the Internet about flowlayout, group, etc. all these are useless examples I just need a basic method to…… -
java. Lang. IllegalStateException: sendredirect() cannot be called after submitting the response
Two days I tried to find out what was wrong I read here that I should add a return to the code, and then I did it, and…… -
Java – string instantiation and StringBuffer instantiation
I can't figure out if String ab = "hello"; //straight initialization String ab_1 = new String ("hello_1"); //…… -
Override Private Final methods in Java
class X1 class X1 { private final void show() { ... } } class X2 extends X1 { private final void show() { ...…… -
Open source audio library in Java
I'm looking for a similar one from un4seen（ http://www.un4seen.com/ ）Bass open source audio library for Java applica…… -
Why does Java forkcomb not cause stackoverflowerror?
I'm a new programmer. I'm trying to teach myself what causes stackoverflow I play with loops and cause errors, but the……