Java 归档 - Page 99 of 655

Java – how to fix com mysql. jdbc. exceptions. jdbc4. Mysqlnontransientconnectionexception: no operation is allowed after the connection is closed Exceptions?

This is a query for my records public void saveTotal(JTextField txtGtotal,JTextField txtPTotal) { try { Re……

Java

2020-08-27

The Java 8 stream aggregates a map

I tried to do something that seemed straightforward, but so far I have no luck I have a list of maps from a bunch of p……

Java

2020-08-27

Java string finder – how do I switch case sensitivity?

I have a method to search the file for the string you give it and return a count But I have a case sensitivity problem……

Java

2020-08-27

Java – missing datasource explorer in eclipse Kepler

I recently downloaded eclipse Kepler Datasource Explorer is missing in this version of Kepler Datasource Explorer can ……

Java

2020-08-27

Java – bitwise OP unexpectedly becomes negative

Can someone explain to me why I got these results? public static int ipv4ToInt(String address) { int result = 0; ……

Java

2020-08-27

Java – changes to Lucene index files during document acquisition / update / deletion?

I'm working on the latest version of Lucene 4.10 2. It combines Java as the front end and Oracle 12C as the database I……

Java

2020-08-27

The value of Java – hashtable will not increase

The following java code: public class TestCSVDataToMap { public static Hashtable<String,Integer> testTable ……

Java

2020-08-27

Is it safe to run more than 1K threads in Java?

I'm making a program that tries to get all the possible results Threads in the program generate more threads (slightly……

Java

2020-08-27

Java – why can’t I use generic types to implement non generic signatures

I'm a little confused about the java compiler I have an interface with "object" method signature: public interface Bea……

Java

2020-08-27

Java – GlassFish: messagebodyprovidernotfoundexception in Jersey client

Hi, all I tried to create a rest web service from scratch This is my service part @Path("/Phones") public class Phones……

Java

2020-08-27

Java – how does the spring jdbctemplate record exception parameters?

Using spring's jdbctemplate, I've been trying to find a concise way to record exceptions in the Dao layer, but I can't……

Java

2020-08-27

Java – replace duplicate substrings in string

I work in Java and I want to take the following string: String sample = "This is a sample string for replacement strin……

Java

2020-08-27

Java – spring MVC, excel file download, file destruction

I handle excel export function in one of my webapps I set up a small test case and made the download work, but the xls……

Java

2020-08-27

We can use system. Net in Java Web applications exit()

We are using java to develop web applications I want to use system. Com in one of my methods Exit() instead of return ……

Java

2020-08-27

Calling Java methods from native code using JNI

I'm new to JNI I have successfully written some programs that call native methods written in C language Now I need to ……

Java

2020-08-27

Java – confused about extending the generics of existing enum types

Question 1: I'm a little confused about these codes: public class MyClass1 <E extends Enum<?>> { // ..……

Java

2020-08-27

Java – string index using replace all is out of range

How to replace mapdir surrounded by < >? To a certain string? String mapDir = "D:\\mapping\\specialists\\ts_gpc\……

Java

2020-08-27

Java – find K minimum integers in the array

This is my code, which is suitable for finding 1-7 minimum integers, but 8 and 9 When I find the eight smallest intege……

Java

2020-08-27

Java – is there a stateless version of JPA entitymanager?

Hibernate has a stateless version of its session: does JPA entitymanager have something similar? That is, an entityman……

Java

2020-08-27

Java Spring JPA FetchMode. Join does not use join

I use JPA to have a very complex model structure in spring When using spring data to query my database, I expect a que……

Java

2020-08-27

Java – NullPointerException in Avro reflectdatumwriter

I have a specific problem with Avro serialization of Java objects I have POJOs generated from the XSD schema, and then……

Java

2020-08-27

Creating dirty methods for threads in Java

I recently started to delve into multithreading in Java In the process of exploring things, I found that there are two……

Java

2020-08-27

Java – how to convert char [] to int?

I have a problem. I need to take an array of characters (only composed of numbers) and print its value as an integer p……

Java

2020-08-27

Java – different methods of passing parameters: String args [] or – D?

I've seen many Java use the - D option to pass some parameters The more familiar method is to pass the parameter with ……

Java

2020-08-27

Can I add Ruby gem / module like a Java jar file?

I use eclispse Kepler and dltk plug-ins to make ruby I can't "request" the nokogiri module because eclipse can't find ……

Java

2020-08-27

Java – more appropriately, amortized o (1) vs o (n) for inserting unordered dynamic arrays?

This belongs to stackoverflow COM / help / on topic's "software algorithm", in this case, is a software algorithm that……

Java

2020-08-27

Delete the object created in ArrayList in Java loop

I'm trying to delete the objects I created in ArrayList: turtles.add(new Turtle()); I want to get rid of the last turt……

Java

2020-08-27

Java – remove the back arrow button from the action bar

In my android project, whenever I go from first activity to second, I get a left arrow button, followed by some text i……

Java

2020-08-27

The Java input date from scanner is on one line

I'm trying to read the date from the user to pass to the Gregorian calendar variable At present, I have an embarrassin……

Java

2020-08-27

Multithreading – do I have to signal an anonymous thread if the main thread completes?

Is it necessary to explicitly stop all threads prior to exiting a Win32 Application? 5 procedure TForm1.FormCreate(Sen……

Java

2020-08-27

Java – list iteration – General Logic

I have a bean list (list < aclass >), from which I create two sub lists based on some logic, including checking ……

Java

2020-08-27

Java deadlock when synchronizing on local resources?

I see the problem of multiple thread deadlock in the same line of code I can't understand why the thread is blocked on……

Java

2020-08-27

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Java – how to fix com mysql. jdbc. exceptions. jdbc4. Mysqlnontransientconnectionexception: no operation is allowed after the connection is closed Exceptions?

The Java 8 stream aggregates a map

Java string finder – how do I switch case sensitivity?

Java – missing datasource explorer in eclipse Kepler

Java – bitwise OP unexpectedly becomes negative

Java – changes to Lucene index files during document acquisition / update / deletion?

The value of Java – hashtable will not increase

Is it safe to run more than 1K threads in Java?

Java – why can’t I use generic types to implement non generic signatures

Java – GlassFish: messagebodyprovidernotfoundexception in Jersey client

Java – how does the spring jdbctemplate record exception parameters?

Java – replace duplicate substrings in string

Java – spring MVC, excel file download, file destruction

We can use system. Net in Java Web applications exit()

Calling Java methods from native code using JNI

Java – confused about extending the generics of existing enum types

Java – string index using replace all is out of range

Java – find K minimum integers in the array

Java – is there a stateless version of JPA entitymanager?

Java Spring JPA FetchMode. Join does not use join

Java – NullPointerException in Avro reflectdatumwriter

Creating dirty methods for threads in Java

Java – how to convert char [] to int?

Java – different methods of passing parameters: String args [] or – D?

Can I add Ruby gem / module like a Java jar file?

Java – more appropriately, amortized o (1) vs o (n) for inserting unordered dynamic arrays?

Delete the object created in ArrayList in Java loop

Java – remove the back arrow button from the action bar

The Java input date from scanner is on one line

Multithreading – do I have to signal an anonymous thread if the main thread completes?

Java – list iteration – General Logic

Java deadlock when synchronizing on local resources?

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