包含标签：Java 的文章
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Java – why is the Boolean value from this array to 2D array true?
Hi, I happened to meet the code sent to me by my friend and had trouble writing the second part of the print statement…… -
Multithreading – Delphi parallel programming – multithreading slow
nice day, The webcam class has about 30 frames per second, and all these frames will be saved in vectors (such as queu…… -
Java – gets the object from the selected JTable
I have a JTable to display a list of books, which can be filtered and sorted BookSwing. java package com.bookretailer.…… -
Java – how to add visual content to JPanel?
I have defined a class named stone to add graphic blocks to JPanel: public class Stone { private int x,y; pri…… -
Java – if string objects are interned, why does changing one affect others
See English answers > what is the difference between a variable, object, and reference? 5 public class EqualExample…… -
Java array creation
This is just a simple question. I can't find the answer in the document! String args[] = new String[0]; args[0] = "tes…… -
Java comprehensive list
I am looking for an open source library with a composite list implementation List list1 = new ArrayList(); list1.add("…… -
Java – returns the class name instead of the class name, and the memory address
I want the two teams to play against each other When I say team1 I call it play (team2); public class teams{ publi…… -
Java – use strings xml w / Android
I read a lot of things, but it seems that my app didn't get strings The value of a string in XML It actually seems to …… -
Java – wrap another string around the string
Do I have any utils methods in Java that allow me to surround a string with another string? It's like: surround("hello…… -
Java – try, catch and finally blocks
public class D { public class D { void myMethod() { try { throw new IllegalArgumentException(); } cat…… -
Java – how do I reject a mercurial check-in that destroys a build?
I have a java project managed by mercurial and built by Jenkins Is there any way to prevent developers from checking c…… -
Java – spring: URL does not parse the link correctly
Although I am experienced in Java, I am unfamiliar with the spring framework and web applications When I run my site o…… -
Why are these invalid in Java?
List<Object> myList = new ArrayList<String>(); //(hint: no) List<Object> myList = new ArrayList<S…… -
javax. xml. Bind’s Base64 encoder / decoder eats the last two characters of the string
I need to convert some strings using Base64 encoding, and I'm glad to see that I don't have to scroll through my own C…… -
How to check spaces in Java
String selectedVal = ""; String selectedVal = ""; for (SelectItem item : filterItems) { selectedVal =…… -
Java – find the number of repetitions of a number in an array less than o (n ^ 2)
I wrote the sample code But this is n ^ 2 int a[]={1,4,1,5,2,3,1}; int b[][]=new int[5][2]; int i,j,k=0,count=1; boole…… -
Java – @ override gives errors in eclipse?
When I import a project from the workspace in eclipse, it will make an error in the @ override comment If the project …… -
Java – use bouncycastle to read the elliptic curve private key from the file
The bouncycastle encryption API allows the use of regular Java Security package objects create and validate digital si…… -
Replace the string in R with the pattern and replace the two vectors
Suppose I have two such vectors: a <- c("this","is","test") b <- c("that","was","boy")@H_301_12@ 我也有一个像…… -
Java – how do I call methods for all objects in ArrayList?
So I have an interface, pet, as follows: public interface Pet{ void Eat(); } This is achieved by: public class Pup…… -
Java – joda time – month difference between two dates
See the English answer > number of days between two dates in joda time DateTime date1 = new DateTime().withDate(201…… -
Using pow () – method in Java
I am writing a program in Java. The user should enter an integer n. then my program should create an array with entrie…… -
Cron work for Java programs
I'm using a java program that sends emails after some file transfers I am using eclipse to write program code How to s…… -
Recursive merging of Java – N-level mappings
Is there any way to deeply merge maps in Java? I've read some posts about it, but most solutions seem to deal with onl…… -
Java – how do I do this?
I'm a beginner. I want to write java code in eclipse The program takes linkedlists of two integers (for example, a and…… -
Java Rounding Up
How do I set the value of numbergrade so that if it is 89.5, it becomes 90 Numbergrade is treated as double, but makin…… -
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Java – why does the code in finally execute even if it is returned in a try block?
Code: public String get() { try { //doSomething return "Hello"; } finally { System.out.print("Finally")…… -
Why did you choose to use the finally statement instead of the catch statement? (JAVA)
I'm new to Java and I'm still trying to understand the basics I've been learning exception handling in the form of try…… -
Java – how to convert a double to a string in Android
I want to convert a string to double in my constructor. I can't change it in the constructor, because in a process, th…… -
Java – static variable reset on program restart
I have a problem with static counter variables In the super class ("card"), I have a variable to calculate the number ……