Java
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Java – general reflection assistant method for equals and hashcode
I'm considering creating a reflection helper for equals and hashcode >In the case of equals, the helper method find…… -
Field assignment in Java foreach declaration
I know that the foreach loop used in the following example cannot be compiled But does anyone know why fields are not …… -
Java – the most effective idiom for reading only one integer from a file?
Trying to solve Facebook's Puzzle "happiness hop", http://www.facebook.com/careers/puzzles.php?puzzle_id=7 I only read…… -
Java – why reference the base class when I can access all methods by referencing subclasses?
I'm learning java concepts Anyone can give me the actual concept. Why do we have to assign subclass instances to base …… -
Java list best practices
I need some containers to hold elements. If I'm going to try to get the size () I element, I'll get the element number…… -
Java – Android – how to delete an item from a cursor?
Suppose I use the following cursor to get someone's call record: String[] strFields = { android.provider.CallLog.C…… -
How do I get the second word from a string?
Take these examples Smith John Smith-Crane John Smith-Crane John-Henry Smith-Crane John Henry I want the first word af…… -
Java – which is faster, int to string or string to int?
This seems to be a fairly basic problem. I apologize in advance I'm writing an Android application that uses a set of …… -
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…… -
Loop stop Java
For the following code, when "n" is about 100000, it will stop running I need it to run to a million I don't know what…… -
Java – generics – what am I missing or what’s the point?
I have the following code: public class AClass<X extends AnInterface> implements AnotherInterface { public …… -
Triangle numbers in Java
I'm new to Java. Now I want to learn better loops I did some examples, but I don't know how to make a triangle that lo…… -
Is there any priority between multiple try / catch executions in Java?
In the following program, sometimes I get the following output: Number Format Execption For input string: "abc" 123 oc…… -
String initialization and connection in Java
Everything is fine in my application, but I want to improve performance and optimize my code Which of the two is bette…… -
Connecting with Oracle in Java application
I have downloaded Oracle express 11g and installed it Now I want to connect it from a Java application This is my conn…… -
Java – getting fragmenttransaction from activity when using compatibility
So I'm developing a project that I want to run on traditional Android devices, so I use the compatibility library I us…… -
Java – common objects in Apache thrift
I wonder if I can use IDL language to define "general object" in Apache thrift, similar to the "object" class in Java …… -
Java – abstract methods have no body?
I'm a novice in Java (I've been studying for 4 months now) So my question may seem too simple My understanding is that…… -
Java – underlying datastructure of HashSet
For ArrayList, the basic datastructure is array. For LinkedList, it is a link object. For HashMap or hashtable, it can…… -
Java – written in ColdFusion Properties file
Has anyone done this? Solution You can easily do this using the underlying Java properties class: <cfscript> fos…… -
Java – rules that implement comparison methods
Like CompareTo, it must be "reflexive, antisymmetric and transitive". Are there any rules to implement the comparison …… -
Why does my really simple java program sometimes work and sometimes it doesn’t work?
I've just started using Java and only used PHP before - it's hard to find object - oriented things I am using the ecli…… -
Java: large integer error
I want to use the following mathematical formula in Java: (44334*(220*220))+ (81744*220) + 39416) When I enter the sam……