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- How to implement array initialization in java
- Methods to implement array initialization in Java: 1. Dynamic initialization, format [data type [ ] array name = new data type [array length]]; 2. Static initialization, format [data type [ ] array name = new data type [ ] { Element 1, Element 2, Element 3...}].
- JavaBase 48111 2020-10-22 10:52:02
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- Convenient statistical order income (1)
- The java basic tutorial column will show you how to conveniently count order income.
- JavaBase 2155 2020-10-21 17:22:37
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- How to call method of another class in java
- Java calls a method of another class: 1. The class method is modified with static, and the code is [public static void sayStatic()]; 2. The method without static modification, the code is [public void sayInstance()].
- JavaBase 35307 2022-01-12 15:38:28
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- How to display java error information on the page
- The method for displaying Java error information on the page: first customize the exception class; then throw the exception class in the service layer, and the controller class inherits the main exception class; then define the main exception class, in which you can write multiple self-defined exception classes; Finally complete the information code.
- JavaBase 5290 2020-10-21 09:52:21
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- Finally here...RocketMQ Literacy Chapter
- The java basic tutorial column introduces the knowledge about RocketMQ in detail today.
- JavaBase 2981 2020-10-20 17:16:39
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- Detailed jdk8 installation tutorial
- How to install jdk8: first double-click the exe file and install it step by step according to the default settings; then right-click "This Computer-Properties-Advanced System Settings-Advanced-Environment Variables-New"; then create a new environment variable JAVA_HOME; finally configure the environment variables Path is enough.
- JavaBase 47175 2020-10-20 16:21:59
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- How to view java class files
- How to view java class files: first download the [jd-gui] tool and unzip it; then in the tool interface that opens, click File and open File in the upper left corner; finally select to open the class file.
- JavaBase 5390 2020-10-20 11:02:46
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- Garbled code problem in java char array output
- Solution to garbled output of java char array: initialization is required when declaring the array, the code is [char buf[] = new char[200];for(int i = 0; i < 200; i++){buf[i] = ' 0';｝】
- JavaBase 3034 2020-10-20 10:50:05
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- How many bytes does the boolean type occupy in Java?
- The boolean type in Java occupies bytes: 1. 1 bit. The reason is that the value of the boolean type only has two logical values: true and false. After compilation, it will be represented by 1 and 0; 2. 1 byte. The reason is that although After compilation, 1 and 0 only occupy 1 bit of space, but the smallest unit of data processed by the computer is 1 byte.
- JavaBase 7509 2020-10-20 10:43:11
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- How many numbers does java int have?
- Java int is 4 bytes, 32 bits. The value range of int is [-2^31-2^31-1], that is, [-2147483648-2147483647]. For positive numbers, its complement is Itself, for a negative number, its complement is the inversion of all the bits of the binary number of the corresponding positive number plus one.
- JavaBase 14455 2020-10-20 10:37:16
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- How to convert Chinese garbled characters in Java
- Method for converting java Chinese garbled code: first use the editor to write the java source file; then use [javac.exe] to compile the java file, and use JDK to write the compiled and saved information in the memory into the class file; finally run the compiled class .
- JavaBase 4240 2020-10-20 10:26:37
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- What to do if the java -version command reports an error
- Solution to the error reported by the java -version command: First open the [Windows\System32] and [Windows\SysWOW64] folders in the C drive; then find the [java.exe], [javaw.exe], and [javaws.exe] files and delete them That’s it.
- JavaBase 4221 2020-10-20 10:19:50
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- Solve a bug caused by i++
- The java basic tutorial column introduces bugs caused by i++.
- JavaBase 1681 2020-10-19 17:40:41
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- Let's talk about kotlin's covariance and contravariance from Java
- The java basic tutorial column introduces kotlin's covariance and contravariance today.
- JavaBase 1928 2020-10-13 11:14:23
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- Java High Concurrency System Design - Cache
- The java basics column today introduces the caching chapter of java high concurrency system design.
- JavaBase 2085 2020-10-10 17:24:49
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