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Solution to garbled characters when reading Chinese files in Java under Linux

Solution to garbled characters when Java reads Chinese files under Linux: 1. Run the command vi /etc/profile; 2. Add the configuration zh_CN.GBK; 3. Run the command source /etc/profile to reload the configuration; 4. Restart the java project.

Nov 12, 2019 pm 02:04 PM

linuxjava读取文件乱码解决方法

How to create and set a button in java

How to set a button in java: first import the java.awt and javax.swing packages; then create a new BorderLayout layout and create a JButton button to place on the layout; finally use the button method to set the button.

Nov 12, 2019 pm 01:51 PM

java按钮

How to delete elements from an array in JAVA?

Java arrays have a fixed length, so elements in the array cannot be deleted directly. You can delete elements of the original array by creating a new array and assigning the retained elements in the original array to the new array.

Nov 12, 2019 pm 01:30 PM

java数组删除元素

Solution to Chinese garbled characters when java adds data to mysql

The reason why Chinese garbled characters appear when java adds data to the mysql database is that the character set is inconsistent. Solution: It only needs that the character set specified when creating the database table is consistent with the character set specified by the URL when setting up the database connection in Java.

Nov 12, 2019 pm 01:20 PM

mysql中文乱码java解决方法

How to read data in java

How to read data in java: first use File to create a file object; then use FileInputStream and InputStreamReader to obtain the input stream; finally, read the data line by line through the readLine method of the BufferedReader class.

Nov 12, 2019 pm 01:18 PM

java读取数据

Detailed explanation of this keyword in Java

The this keyword in Java points to a reference to the current object. Usage of this keyword: 1. this. attribute name, refers to accessing member variables in the class; 2. this. method name, accessing the member methods of this class; 3. this(), accessing the constructor method of this class.

Nov 12, 2019 pm 01:08 PM

Javathis关键字详解

How to upload files in java

How to upload files in java: 1. Download the jar package of the common-fileupload upload component and introduce it; 2. Create a new UploadHandleServlet class that inherits from HttpServlet; 3. Use FileOutputStream to write data and save it.

Nov 12, 2019 am 11:57 AM

java上传文件

How to get unique random numbers in java

Methods to obtain non-repeating random numbers in Java: 1. Define a digital array; 2. Obtain random numbers through random digital array subscripts; 3. Assign the value of the random subscript of the digital array to the actual array; 4. Add the subscript to index The value is exchanged with the last value of the array index.

Nov 12, 2019 am 11:46 AM

java获取不重复随机数方法

How to solve garbled characters in java

Methods for solving garbled characters in Java: 1. When the file is encoded in utf-8, use the "javac -encoding utf-8" parameter for compilation; 2. If the web page is garbled, you need to specify the encoding method of the response header "Content-Type"; 3. Use getBytes Method to perform encoding conversion.

Nov 12, 2019 am 11:36 AM

java解决乱码

Does Java array have length method?

There is no length() method for arrays in Java, only the length attribute. Array array.length returns the length of the array.

Nov 12, 2019 am 11:30 AM

Java

What is the difference between interface and class in java

The difference between interfaces and classes in Java is: essentially, an interface is also an abstract class, but the interface only contains the definition of constants and methods, without the implementation of variables and methods.

Nov 12, 2019 am 11:29 AM

接口类区别java

What collection types are there in java?

There are three main types of collections in Java: set, list and map. The objects stored in the List are ordered and repeatable; the objects stored in the Set are unordered and cannot be repeated; the Map collection stores key-value pairs, and the keys cannot be repeated, but the values can be repeated.

Nov 12, 2019 am 11:19 AM

java

How to initialize arrays in Java

Methods of initializing arrays in Java: 1. arrayName = new type[] {element1...}; 2. type[] arrayName={element1...}; 3. arrayName = new type[length].

Nov 12, 2019 am 11:17 AM

数组初始化java方法

How to configure java environment variables

How to configure java environment variables: 1. Right-click the computer-Properties-Advanced system settings; 2. Click Environment Variables and click New under the system variables column; 3. Create a new JAVA_HOME variable with the value as the jdk installation path; 4. Edit the Path variable , just add the jdk\bin and jre\bin paths.

Nov 12, 2019 am 11:14 AM

java环境变量