包含标签：Java 的文章
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How to compare two string arrays without Java utils
Check whether array Arr1 contains the same elements as arr2 in the same order in Java For example: isTheSame({"1","2",…… -
How to select random numbers in a range, but weight them to a part of the range? (in Java)
I want to choose a random number from a series of numbers, but I want to weight part of the range For example: >Sel…… -
Java – split the file into four parts
I want to divide a file (suppose an MP3) into four parts I tried this code But only file1 Mp3 works normally I can't p…… -
Java – even if we have a constructor, how do we initialize variables to default values
I have a question about the default constructor in Java Suppose I have two files, a.java public class a { int x; …… -
How to advance the modification date by 6 months in Java
See the English answer > java: Customize adding 1 month to the current date This is my output: Current date: Januar…… -
Java – if there is a statement with \ u0026 \ u0026, the first condition needs to be true before testing the second
See English answer > @ L_ 301_ 0 @ 9 From my test, it seems that the if statement will exit [10] before trying to g…… -
Java – AccountManager: invalideauthttoken does not invalidate the token
I tried to get a brand new token from the Google account stored in the Android device, but all the tokens I got were o…… -
Java – why can’t Android os. build. Version resolves to a variable?
I received an error: "android.os.build.version cannot be resolved to a variable" as attached to the line "int myversio…… -
Different icon sizes of the operating system in Java
I just realized that different versions of windows use icons of different sizes for different purposes For example, th…… -
JPA – SQL query using Union and select constants equivalent to SQL query
I wrote an SQL query that basically selects from many tables to determine which tables have rows created since a speci…… -
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 …… -
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 – use generics to return multiple types
I have this method – public List<Apples> returnFruits(String arg1){ List<Apples> fruits = new ArrayList<…… -
Java Swing: add jlabel to JPanel
I just want to add jlabel to the existing JPanel It looks simple. I searched everywhere I think this is right, but the…… -
Java – when using “. Get (0)” in an empty list, I get an out of bounds exception instead of null?
So in my homework, for my error checking test, I made a list < someobject > and I got an indexoutofboundsexcepti…… -
Java – the program does not display the desired string representation of the object
I created a program in Java that should return all orders to the provider This is the procedure: package sakila.ui; i…… -
Java – if you use the Boolean Android statement
I've encountered Boolean problems in if statements all day. Now I'm really bothering me! I've seen other Android threa…… -
Java – displays the password in jpasswordfield instead of setting 0 to echo char
How do I display the text of jpasswordfield instead of setting 0 to echo char? Java docs says: The following results i…… -
Enumerating Java byte types in constructors
public enum Rank { public enum Rank { TEN("Ten",1),NINE("Nine",2),EIGHT("Eight",0),SEVEN("Seven",0); private…… -
Java – how to use the kill – 3 command to dump the Jave heap every 30 seconds
Please help me, I want to run a shell script, which should use the kill - 3 command to dump the Jave heap every 30 sec…… -
Java – why are constructors not inherited?
I've been using eclipse Juno to learn constructors in inheritance When I press Ctrl o twice in childclass, it will dis…… -
Send the file through objectoutputstream and save it in Java?
I have this simple server / client application. I'm trying to let the server send files through OutputStream (fileoutp…… -
Java general conversion, indirect
I find the actors in Java strange. I've never seen them before Test strange things On HashMap: HashMap<String,Objec…… -
Java – thread status exception
When I try to restart my thread, I receive the following error Exception in thread "Thread-1" java.lang.IllegalThreadS…… -
Sleep – JPA dirty check
I know that JPA implementers (such as hibernate) monitor entities attached to the persistence context. If any fields o…… -
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 – do we have all the original types of pools in the permgen area of the heap?
I know the concept of string pool in permgen area of heap So when we do something like this String firstString = "Stac…… -
Hexadecimal enumeration types use java to return wrong values?
I use the following enumeration types in the following code: public static enum PanelType { PAS8((byte)0xA6),PAS83…… -
Concurrent modification exception in Java
See English answers > repeating through a collection, avoiding concurrent modificationexception when removing objec…… -
Java – why can’t the content of my JFrame be displayed correctly?
In order to reduce the code, I am taking out the code irrelevant to the problem, such as addactionlistener(); wait My …… -
Java – change classes and objects (other aproachs?)
I have several situations that I want to do This may be an example: Consider the possible implementation of the chess ……