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What does the '$' symbol mean in java

The "$" symbol in Java represents the end of the matching string in regular expressions. In the batch command findstr, the "$" symbol represents the end of the line. For example, "step$" only matches the last word in "hello world step".

Dec 07, 2019 am 09:03 AM

java

What is the difference between synchronous and asynchronous in java

The difference between synchronization and asynchronousness in Java: Synchronization means sending a request and you need to wait for the return before you can send the next request. There is a waiting process; asynchronous means sending a request and you do not need to wait for the return. You can send the next request at any time, that is No need to wait.

Dec 06, 2019 pm 04:43 PM

java Synchronize asynchronous

Solution to garbled code in java reading and writing html files

Solution to garbled code in java reading and writing html files: 1. Use the InputStreamReader() method to read the HTML file and set the file encoding format. 2. Use the OutputStreamWriter() method to set the encoding format for java to write HTML files to utf-8.

Dec 06, 2019 pm 04:16 PM

java Garbled characters

How to call stored procedure in java

The method of calling a stored procedure in "java" is: first load the driver, obtain the connection, then create the object of the stored procedure, set the value for the first parameter of the stored procedure, then register the second parameter of the stored procedure, and finally execute the stored procedure , get the output parameter value of the stored procedure.

Dec 06, 2019 pm 03:12 PM

java stored procedure transfer

How to let Java get the string entered by the user

The method for "Java" to obtain the string entered by the user is: use the "Scanner" input class. First, you need to import the input class, then create an input object to save the string data entered by the user, and then call the "nextLine" method. Just get the string entered by the user.

Dec 06, 2019 pm 02:54 PM

java string Obtain enter

What are the commonly used packages in Java?

Commonly used packages in "Java" include: 1. Packages that provide basic classes for "Java" programming; 2. Packages that include collection frameworks, legacy collection classes, event models, date and time implementations, and various utility classes. Package; 3. Package that provides system input and output through file system, data flow and serialization.

Dec 06, 2019 pm 02:11 PM

java Bag Commonly used

Solution to garbled characters when url is transmitted in Chinese in Java

The solution to the garbled characters when the URL transmits Chinese in Java: Use the URLEncoder.encode() method to encode the Chinese characters to be transmitted in the URL, and then decode the characters on the page where the URL transmits Chinese.

Dec 06, 2019 pm 01:56 PM

java Garbled characters

How to get the day of the week of the current date in java

How to get the day of the week in java: 1. Use the Calendar.getInstance() method to get the current date, and then use the Calendar.DAY_OF_WEEK method to get the day of the week. 2. Use SimpleDateFormat("EEEE") to obtain.

Dec 06, 2019 pm 01:40 PM

java

Introduction to the method of determining whether a string is garbled in java

How to determine whether a string is garbled in java: You can use the java.nio.charset.Charset.forName("GBK").newEncoder().canEncode("test") statement to determine whether a string is garbled.

Dec 06, 2019 pm 01:21 PM

java Garbled characters

Three ways to implement Fibonacci sequence in java

This article comes from the java introductory learning column. It introduces three methods of realizing the Fibonacci sequence with examples. I hope it can help you. The implementation methods are: 1. Direct assignment method; 2. Create and print the array; 3. Call the function.

Dec 06, 2019 pm 12:00 PM

java Fibonacci Sequence method

How to open java jar file

How to open the jar file: 1. Use WinRAR to open the jar file, right-click the jar file, select the open method as compressed file, and then open it in the form of a compressed package. 2. Use the Java program to open the jar file, right-click the jar file and select Java(TM) platform SE to open it.

Dec 06, 2019 am 10:57 AM

java document

Java cannot open smart prompt solution

Java cannot open smart prompt solution: 1. Select "window"-"preference". 2. Select "java" and expand it. 3. Select "Editor" and expand it. 4. Select "Content Assist" and find "Auto Activation" to modify it.

Dec 06, 2019 am 10:28 AM

java

What is class inheritance in java

Inheritance of classes in Java is achieved by extending other classes to form new classes. The original class is called a super class or base class, and the new class is called a subclass or derived class of the original class. In a subclass, it not only contains the attributes and methods of the parent class, but also adds new attributes and methods, so that the basic characteristics of the parent class can be shared by all objects of the subclass.

Dec 06, 2019 am 10:13 AM

java inherit

java learning main function parameter passing

This article comes from the Java development introductory column. It introduces the relevant knowledge of main function parameter passing with examples. I hope it can help everyone. The command line parameter is the array args of String type in the main method. You can use the "Integer.valueOf()" method to convert the string into an integer.

Dec 05, 2019 pm 05:45 PM

java main