Java
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Why does my java code execute bash commands incorrectly?
I tried to make my java program interact with Linux bash, but something went wrong I have a simple executable prog tha…… -
Override Private Final methods in Java
class X1 class X1 { private final void show() { ... } } class X2 extends X1 { private final void show() { ...…… -
Java – rules that implement comparison methods
Like CompareTo, it must be "reflexive, antisymmetric and transitive". Are there any rules to implement the comparison …… -
Java – insert jlabel into jcombobox
http://prntscr.com/1gpdqe Sorry, this is my first time to attend this forum Can someone help me? I've been trying to J…… -
Java – internal static class field visibility
I have two classes, as follows public class A{ private static class B{ private static int s1; private static …… -
java – Camera. Parameters device specific crash (Samsung S3 mini)
The following code is using Galaxy nexus, Samsung S3 and HTC one X, but it crashes on Samsung S3 Mini @Override public…… -
Rescale vector R
Suppose I have an integer vector, for example: > x [1] 1 1 1 4 4 13 13 14 I'm looking for an effective way to …… -
Sleep – JPA dirty check
I know that JPA implementers (such as hibernate) monitor entities attached to the persistence context. If any fields o…… -
Java – how to convert HTML to 2D arrays
Let me say I copy a complete HTML table (when each TR and TD has additional attributes) For example, for this table: &…… -
Java – is it possible to trigger JButton events through method calls – rather than JButton clicks?
Can events be triggered through method calls? (and click) import java.awt.event.*; import javax.swing.*; public class…… -
Java – loads objects from a file into ArrayList
I don't know. If I don't know how many objects there are, how should I read objects from the list? Saving is easier be…… -
Why doesn’t Java recognize my ArrayList with an overloaded constructor
I have two constructors set as follows: public XMessage(Information info,List<Object> results) { this.inform…… -
Common wildcards in Java generics
Suppose I have an interface interface Foo<T> { void foo(T x); T bar() } And this type of object with …… -
Java – is initialization the same as null initialization?
If you declare such an object: Object x; Does it initialize to null? For example, is will (x = = null) true? Solution …… -
Convert hexadecimal strings to unsigned byte arrays in Java
I get a 14 byte hexadecimal string, such as a55a0b0500000000000022366420ec But I want to compare them with such bytes:…… -
Java – removes duplicate beans from the list
I loop through a set of beans and check something and add it to the list I just want to add a specific item List<Pa…… -
Java – which JRadioButton to select
I have several jradiobuttons in the button group private ButtonGroup radioGroup= new ButtonGroup(); private JRadioB…… -
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 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 – why would anyone construct a while loop like this?
I'm reading a book about Java. We're reading a ByteBuffer from a channel I found the author's way to construct an odd …… -
Java – test greenmail without installing an SMTP server
I'm trying to use greenmail to test the email function on my localhost The problem is that I don't have an SMTP server…… -
Java – retrieve words from strings
I have this line: (ADDRESS = (PROTOCOL = XXX)(HOST = YYY)(PORT = ZZZ)) I need to retrieve the host name, in this case …… -
Java – an example of barrier decomposition
I'm reading the Book Java concurrency in practice, Can someone give an example of how it decomposes the problem into m…… -
Java AWT / swing “include” and “intersect” methods do not work properly
I tried to teach myself some Java AWT and simple graphics, but it was difficult to use the contains and intersects met…… -
Java – no database selected when retrieving from MySQL website
I have a MySQL database and I try to retrieve it from our website host (GoDaddy) I followed a seemingly correct format…… -
Using generic classes and generic methods in Java is difficult
Java novice, I did search some examples, but I'm really sad I have a node class that uses generics: public class Node&…… -
How is inheritance in Java different from real-world inheritance?
I got this question in an interview Through the inheritance of the real world, the interviewer means that something li…… -
Use Java [Close] to find the index of the first occurrence of integer from the string
I have string xxxy 1 / 1 / 2. I need to use java to find the index of integer for the first time The output will be th…… -
Java – what is an exception control loop?
I'm trying to ask a question in my study guide: I can't decipher the true meaning of this question because I've never …… -
How to “refute” an object in Java
class DogOwner { class DogOwner { Dog dog; DogOwner(Dog dog) { this.dog = dog; } } class Dog { …… -
Java – why is enumeration more useful than HashMap in this case?
This seems to be a common problem, but all the items in the suggestion box don't accurately explain what I'm thinking …… -
Java – why system out. Println must be inside the method?
class Employee { class Employee { int DOB; int eid; String name; double salary; System.out……