包含标签：Java 的文章
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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…… -
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 – ArrayList removeall() does not delete objects
I have simple ArrayLists for member classes: ArrayList<Member> mGroupMembers = new ArrayList<>(); ArrayLis…… -
Concurrency – can I receive results from one of multiple goroutines in go?
I just learned about Google's programming language go I'm interested in the concurrency support it provides and set ou…… -
Java – splits the list into sub lists according to the conditions of the stream API
I have a specific question There are some similar problems, but these problems are either Python or Java, or even if t…… -
Can you comment on my java game?
I have marked this question as a community wiki, so no reply points will be thrown I made this game, forest defender, …… -
Java – cannot inherit from final class
I just created my first Android library In another application, I want to extend a class from it But it shows an error…… -
Is there any way to declare a method “friendly” in Java?
I know you can set the property to public, friendly or private to specify its visibility Is there any way to announce …… -
Java – get random numbers from ArrayList?
ArrayList<Integer> lista = new ArrayList<Integer>(); ArrayList<Integer> lista = new ArrayList<I…… -
After uninstalling Java and reinstalling it to a new location, eclipse will not start
I reinstalled the JDK tonight because there is embedded space in the program file... Now eclipse will explode immediat…… -
Java – how do I send messages from my android app to specific contacts via WhatsApp?
I'm developing an android app. I need to send messages to specific contacts of WhatsApp Uri mUri = Uri.parse("smsto:+9…… -
Merge sort Java
I'm trying to create a merge sort method, but it continues to give the wrong sort Where do I make changes to actually …… -
Java – can I create a bitmask for ~ 100 constants?
Does this mean that the 100th constant must be 1 < < 100? Solution You cannot do this directly because the maxim…… -
Java – returns the number of rows in a 2D array?
I have this 2D array: private boolean[][] landscape; This landscape array defines a pond with [rows] and [cols] The pu…… -
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…… -
Short condition, Java
I want to test whether the current char is', ',' – ',' Or‘‘ if((current != ' ') || (current != '.') || ...) Any ideas?…… -
Java – cannot run Hello world on drools – kiecontainer does not select DLR files from the classpath
The following documents: 6.1 The basics I created a simple class applicant, which should be checked by using the DRL f…… -
Java – how to avoid code duplication of many small classes?
I have different courses, including English, Spanish, French, etc Class English{ String name = "English"; Stri…… -
How does this java code work?
public static void main(String[] args) public static void main(String[] args) { int [][]shatner = new int[1][1]; …… -
Java date() giving the error date
See English answer > java parsing string to date 1 It is obvious that there are not 43 days in February. I don't kn…… -
Java ternary operators and setting circular index values
I have a loop that traverses the for loop of ArrayList If the condition is met in the for loop: >I delete the curre…… -
Accessing private collection fields in Java
One of my classes has a field containing set This field is only populated in the constructor and then read by other cl…… -
Java – what is the purpose of using aslist?
I just want to know the benefits and purpose of the aslist () method in arrays It returns a fixed size list supported …… -
Java – what is the purpose of the access modifier
Do you need access modifiers in your programming language? Solution See: encapsulation (Wikipedia) Of course, you can …… -
Sorting array lists in Java
I have finished class Here, iris is another class with certain properties public class Helper { Iris iris; do…… -
Java – how to create a new object with the constructor in array list as one of the parameters?
I have a problem with a constructor that takes ArrayList as one of its parameters public class ItemisedProductLine ext…… -
Java – super fast autocomplete using binary search in sort files (300000 lines)
In my android app, I want an input field with autocomplete The number of projects is about 300000 The best solution se…… -
Java – \ u0026 \ u0026 operator problem
In the following code & & the syntax error is given in the if else statement. I'm not sure how to solve it Can…… -
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…… -
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…… -
How to handle Boolean values in Java through bitwise operators
Consider this example int i=11,j=5; boolean b=true,c=false; System.out.println(b&c); // --> output=false System…… -
AWT or swing for Java for GUI building?
I need to form a fairly simple GUI for the server monitoring process It will have tabs that can cause log tailing, res……