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- Where is java installed?
- The default installation path for 32-bit Java is C:\Program Files(x86)\Java, and the 64-bit installation path is C:\Program Files\Java. You can use the java -verbose command in cmd to view the java installation path.
- JavaBase 7444 2019-12-04 10:14:28
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- How to read files in java?
- Methods of reading files in java: 1. RandomAccessFile method (random reading). 2. FileInputStream method (io ordinary input stream). 3. Buffer buffer reading (based on nio Buffer and FileChannel reading). 4. Memory mapped reading.
- JavaBase 4633 2019-12-04 10:01:05
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- What are java modifiers?
- Java modifiers are used to define classes, methods or variables, and are usually placed at the front of the statement. The Java language provides many modifiers, mainly divided into two types: access modifiers and non-access modifiers. This article introduces 11 types of modifiers in Java.
- JavaBase 4357 2019-12-04 09:52:01
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- Solution to garbled file name when exporting excel using java
- Solution to the garbled file name when exporting Excel from Java: 1. Use the URLEncoder.encode() method to transcode the Excel file name in browsers such as IE. 2. Use byte stream transcoding to transcode the Excel file in the Firefox browser.
- JavaBase 6713 2019-12-04 09:23:34
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- How to determine whether a certain value exists in a string array in java
- The method to determine whether a value exists in a string array in "java" is: first, you can use the "asList" method in the "Arrays" class to convert the array into a "List" list, and then further use the "contains" method to determine the characters Just check whether a certain value exists in the string array.
- JavaBase 6874 2019-12-03 17:54:47
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- Immutable classes in java and their creation rules
- An immutable class in "java" means that a class cannot be reassigned after it is instantiated. The creation rules are: 1. Use the "private" and "final" keywords to modify member variables; 2. Provide a constructor with parameters to initialize member variables; 3. Do not provide a "setter" method for member variables.
- JavaBase 3645 2019-12-03 16:57:44
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- Java method to determine whether it is a legal date
- How to determine whether a date is a legal date in Java: first use the SimpleDateFormat class to define the date format, and then use format.setLenient(false) to strictly control the date conversion. Unconventional formats become illegal.
- JavaBase 5017 2019-12-03 16:16:43
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- Detailed explanation of the solution to garbled file names in Java downloads
- Solution to the garbled file name of java download: 1. Use the URLEncoder.encode() method in the IE browser to set the file name encoding to "UTF-8". 2. Set the file name encoding in Firefox by setting the byte stream encoding.
- JavaBase 2007 2019-12-03 15:49:07
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- How to inherit a class in java
- In the Java language, the inheritance of an implementation class uses the extends keyword, and the format of the inherited class is: [public] class SubClass extends SuperClass {definition of the class body}.
- JavaBase 7498 2019-12-03 15:33:09
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- How to run jar package in java?
- How to run a jar package in java: Add Main-Class:test.someClassName in the MANIFEST.MF of the jar package, and then enter the java -jar test.jar command in the console to run the jar.
- JavaBase 9956 2019-12-03 15:24:18
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- What is a jar file in java
- The jar file in Java is a document format of Java. It is a file package similar to a zip file. Common classes are usually referenced during development and packaged for easy storage and management. From the customer's perspective, the .jar file is a kind of encapsulation.
- JavaBase 8605 2019-12-03 15:08:28
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- How to implement java serialization
- The implementation method of "java" serialization is: first implement the "Serializable" interface for the class that needs to be serialized, then use an output stream to construct an object stream object, and then use the "writeObject" method of the object stream to specify the " obj" object can be serialized.
- JavaBase 2815 2019-12-03 15:08:23
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- What is the difference between java and android
- The difference between java and Android: Android is the operating system of mainstream smartphones, and Java is a development language. Android is mainly developed in the direction of mobile Internet, and Java is mainly developed in the direction of software.
- JavaBase 2514 2019-12-03 14:57:38
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- Introduction to the solution to Chinese garbled characters when reading files in Java
- Solution to Chinese garbled characters when Java reads files: Specify the encoding method of the data stream as "UTF-8" in the InputStreamReader class when reading files in Java, which can solve the problem of Chinese garbled characters when Java reads files.
- JavaBase 2577 2019-12-03 14:38:09
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- How to get the day of the week for a specified date in java
- How to get the day of the week for a specified date in java: 1. Use the Calendar class to get the day of the week for the specified date. The week obtained by this method starts on Sunday. 2. Use the SimpleDateFormat class and pass in the parameter "EEEE" to get the day of the week.
- JavaBase 3642 2019-12-03 14:17:00
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