包含标签：Java 的文章
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Java – play multiple sound clips using clip objects
I'm developing a program that contains a large number of JButton objects. I hope each object has its own Wav file In a…… -
Reverse single linked list Java
How to reverse a singly linked list in blocks of some given size in O (n) time in place? 4 public void reverseList(){ …… -
JAVA_ What is the reason for the existence of the home environment variable?
Many Java based applications need to set up Java_ Home env variable What is the purpose of this variable? Solution An …… -
Java – abnormal behavior of the zoom in and zoom out function of JfreeChart?
I observed that the functions of "zoom in" and "zoom out" were completely different from those expected For example, w…… -
Java – is there a way to run methods / classes only when Tomcat / wildfly / GlassFish starts?
I need to delete the temporary files during Tomcat startup and transfer them to the folder containing the temporary fi…… -
Java – populate JfreeChart timeseriescollection from MySQL DB?
I'm trying to create a chart in my application that will return the temperature in a few months This chart is a JfreeC…… -
Return date type in Java format
See the English answer > change the format of date Java [closed] Example: original date: 2018 / 01 / 01t15:00.00 00…… -
Java – unable to get okhttp’s response body. Tostring() to return a string
I'm trying to get some JSON data using okhttp, and I can't figure out why when I try to record response body(). The re…… -
Java – how to read PDF stream in angularjs
I get the following PDF stream from the server: How do I read this stream in angularjs? I try to open it as a PDF file…… -
Annotation method in Java
5. General notes Refer to Java core technology Volume I for the above contents -
Install Ubuntu in the virtual machine
12. After the installation is completed, click "restart now" in the pop-up dialog box; 13. Prompt to remove the instal…… -
Java different time format conversion
Date --> String You can specify the corresponding pattern during conversion. -
Multithreading — concurrency
Three of them (iterators, generators and decorators) are important parts of Python's high-level syntax! -
STL – STL summary
6、 Deque ·#Include < deque > · double ended queue· Common interfaces: front(), back(); push_ back(),push_ front…… -
Java – is it possible to shallow copy singleton class objects?
Using the clone method, can we get many instances of a class that has become a singleton? In addition, is it necessary…… -
PAT A1001-A1004
A1002 ： A+B for Polynomials (25 point(s)) The key to solving this problem is the condition given by the problem: the …… -
How do I convert numbers from double to int without rounding?
I want to calculate how many columns can fit in the container First, I calculate how many columns can fit, and then ca…… -
Why do two java files that differ only in comments produce different class files?
I have one named one Java file, which has only one comment line I compile it to generate the class file one Class and …… -
Java 9’s new docs structure – where are the “old” Java packages?
I'm used to accessing Java se documents from the following links, where I can search for Java awt,java. Util and other…… -
Java – does referencing array indexes cause memory leaks?
I'm reading "item 6: eliminating obsolete object references" in the second edition of effective Java The following is …… -
Collections – java8 converts lists to map >
I have a list < person > object and want to convert it to map < integer. The keyword of the list < person …… -
Java – cannot use paths Get() loads files from Maven resources
I apologize for this seemingly simple and almost stupid problem, but I spent a lot of time fixing it without much succ…… -
Java – convert the 3D world (arcore anchor / pose) to the corresponding 2D screen coordinates
I am trying to achieve this transformation Given the anchor pose in arcore, how can the corresponding 2D coordinates b…… -
Java 8 groupby one field and then maps to multiple fields
I have an object structure like this class Person{ String userId; String firstName; String lastName; Set&l…… -
Design pattern course design pattern intensive lecture 7-3 source code analysis of builder pattern (JDK + guava + Spring + mybaties)
StringBuilder public synchronized StringBuffer append(Object obj) { super.append(String.valueOf(obj)); return this…… -
How to assign incremental values to lists in Java 8
Suppose you have a list of objects The list is sorted by one or more fields of the object So according to the sort lis…… -
Java datetimeformatterbuilder with optional mode causes datetimeparseexception
target Provide a flexible parser for localdate instances, which can process input in one of the following formats: >…… -
Java – is it more efficient to scan an array once for multiple predicates or multiple times for a single predicate
I have an int array of 1000 elements I need to extract the sizes of various subgroups in the array (how many are even,…… -
Differences between Java 6 and Java 7 in ArrayList capacity growth
I have a question about how to manage the capacity growth (not size, but capacity) of ArrayList in Java At this time, …… -
Java – when calling integer Should you check whether a string is empty before parseInt?
In a loop, thousands of items are converted from string to int, calling integer Should you check whether the string is…… -
Java – why doesn’t the Oracle specification tell you anything about meta spaces?
As we all know, Java 1.8 permgen was deleted and replaced by Metaspace I've read a lot about Metaspace, and I'm sure i…… -
There was a problem using Jackson to use JSON serialization in Java
Good morning, man! I have a JSON string that looks like: { "StatusCode":0,"Message":null,"ExecutionTime":0,"Respons……