包含标签：Java 的文章
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Java sound generation generates noise
I'm using javax Sound to make sound, but when you play, they will make some noise in the background. If you play sever…… -
Java – how does Android add icons to each listview list item and change the text color and background color
I have a navigation drawer with some list items How to add icons to each list item and change the text color and backg…… -
Java – number of clicks to hear the activity button from within the clip
I just started learning fragments. I have an activity, that is, 1000 lines of code, which I have converted into fragme…… -
Java – create arrays using a for loop
Whether it is possible to create arrays in a similar style in Java, I have been searching and can't find anything int[…… -
Java – the default icon I can use in Android?
I want a list. I want a small icon for success / failure in each project Solution Ok... You can get a set of material …… -
Java – cannot serialize a class that has already been serialized?
See the clip below USPresident usPresident = new USPresident(56); try (ObjectOutputStream oos = new ObjectOutputSt…… -
Java – how do I replace multiple strings in one line?
I want to insert "ob" before each vowel I tried the following code: String out=txt.toUpperCase(); out=out.replaceAll(…… -
Use Java 8 stream to parse CSV file
I have one CSV file, which contains the data of more than 500 companies Each line in the file refers to a specific com…… -
Java – classloader loads the wrong file
I use this snippet to get the file as the input stream File version Txt is packaged in the jar of my application, whic…… -
What are the benefits of Java – executors?
In a life without Java executors, a new thread must be created for each runnable task Creating new threads requires th…… -
Java – jcombobox in JTable cell
I have a JTable created using a model, which is based on an object matrix for(int i=0; i < n ; i++) { ..... …… -
Java – clone and subtract sets – is this useful?
private HashMap<DataObject,HashSet> AllDataObjects; private HashMap<DataObject,HashSet> AllDataObjects; .…… -
Downloading CSV files programmatically using java
Scenario: the website I use to study stock data has a link on the page to export the data to a spreadsheet The format …… -
How to set a specific location in a string in Java?
I have a string called str str = "hi john"; Now I want to set J char to g. how can I do this? Solution You cannot modi…… -
java – ThreadLocal; Is it the same every time you create a copy of a variable?
I'm still confused about the concept of ThreadLocal I've read Javadoc and other related issues, but the terminology us…… -
Why do we need to rewrite equals and hashcode in Java, and why can’t we use the object class to implement them
Guys, please let me know why we need to override equals and hashcode in the real world, and we can't use equals and ha…… -
Java – how to get the file system path of the context root of any application
I'm working on Web applications I'm in my JSP request Called on getcontextpath (), but strangely, I got the address / …… -
. Net – is there a textwriter subclass that triggers an event when writing text?
I wrote a method that accepts textwriter as a parameter (usually console. Out, but not necessarily) When I call this m…… -
Java – reads a byte array from the socket
I have read the sun guide and different similar questions I want to read some unknown number of bytes from the socket …… -
Java – what is a regular expression that removes spaces in parentheses?
I'm writing a program in Java to accept queries If I had a query like this insert into abc values ( e,…… -
Adding Java objects to the database
For college assignments, I was assigned a prize object, which contains text, pictures or video content I want to save …… -
Java – parses XML that contains XML in an element, which you can do
I have a "complex item" in XML, and then a "WorkItem" (in XML) containing a lot of other information. I want this to c…… -
Java conversion / classloader problem
The following is a simplified version of the problem: SomeClass c = (SomeClass) obj.getSomeClassParent() Not always, e…… -
Java – expect this loop to be infinite, but it’s not
This is my java code: public class Prog1 { public static void main(String[] args) { int x = 5; whi…… -
What are the problems with using objects in Java to call static methods?
If I have the following: class A { public A() { } public static void foo() { System.out.println("foo() called"); }…… -
Java multithreading – passing data structures to threads
The application I'm writing generates a characterlist character at some stage At this stage, I am trying to create a t…… -
Read / write int on X86 machine without lock
Suppose in a C program, I have a p thread running on a 32-bit machine and int Max – a shared 32-bit integer Each threa…… -
A Java method class with enum
I have an enumeration that looks like public enum MyEnum { myValue { @Override public String myMethod(Stri…… -
Java – how to fix errors when inserting datetime into DB
I want to do this: pr.setStartdate("2006-09-10T00:00:00"); I received this error: java.sql.sqlDataException: The Synta…… -
Java – how do I use relative paths instead of absolute paths?
So I have a strange question about Java I'm reading and writing files, so the path is very important to me I want all …… -
How to convert a string date with a full month name into a date object in Java?
How to convert a date with a full month name into a date object in Java? This is the sample I need to convert. Date: D…… -
Java – complexity of code
What is the complexity of a program with only one loop? Is it log n? Solution Well, it really depends on what happens ……