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How to generate jar package in java and realize single process operation
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- 2023-06-02 21:15:431009browse
java file package jar run
Effective steps:
1.cmd to the current directory (the directory where the default package main class is located, as an example ) set classpath = the directory where the default package main class is located
2.javac main class name.java
3.java main class name
4. Write the manifest file
Manifest-Version: 1.0 Created-By: 1.8.0 (Sun Microsystems Inc.) Main-Class: 主类名
created-by The version number is unknown -> Enter cmd and enter java -version
5.jar cfm custom.jar MANIFEST.MF *.class
6.custom A bat file (the batch file is the default entrance if it is occupied by the decompression application)
Contents: javaw -jar custom.jar
7. Double-click the bat file to get the two above The file can only be run on a computer with jdk installed
What are the basic data types of java
The basic data types of Java are divided into:
1. Integer type, used to represent Integer data type.
2. Floating point type, a data type used to represent decimals.
3. Character type. The keyword of character type is "char".
4. Boolean type is the basic data type that represents logical values.
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