How to solve the unmappable characters in java encoding gbk
Solution: First use software to open the java file; then use the "ctrl+a" keys to select all the code in the file, and use the "ctrl+c" keys to copy the code; then click "Encoding" at the top of the page and select " Use ansi encoding", use the "ctrl+v" keys to paste the code; finally save and run.
May 24, 2021 am 10:45 AM
What is the shortcut key for returning to the previous step in Idea?
The shortcut key for IDEA to return to the previous step is the "ctrl+alt+←" key combination. The specific method is: first click the "file" tab at the top of the page and select the "setting" option; then enter "keymap" in the input field; finally enter " back" to view the idea and return to the previous step shortcut key.
May 21, 2021 am 11:04 AM
How to run java program in editplus
Running method: First click "Tools" - "User Tools" - "Tool Group" - "OK" button; then click "Add Tool" and select "Application" in the pop-up menu; finally command select bin in the jdk installation directory For java.exe below, select "File name (without extension)" as the parameter, and the initial directory is "File directory".
May 20, 2021 am 11:35 AM
What is the shortcut key for trycatch in idea?
The shortcut keys for trycatch in idea are: 1. Select the required code and press "ctrl+alt+t" on the keyboard. 2. Select the required code and press "ctrl+alt+wins+t" on the keyboard. 3. Set the shortcut keys yourself.
May 17, 2021 pm 03:12 PM
Why is simpledateformat thread unsafe?
Reason: In a multi-threaded environment, when multiple threads use the same SimpleDateFormat object (such as static modification) at the same time, such as calling the format method, multiple threads will call the calender.setTime method at the same time, causing time to be modified by other threads. Therefore threads are not safe.
May 10, 2021 pm 02:40 PM
What is the use of java compareto method
In Java, the compareTo() method is used to compare the Number object with the parameters of the method. The syntax format is "variable 1.compareTo(variable 2)"; the compareTo() method starts the comparison from the first position of the value. If it encounters a different characters, the difference in the ASCII values of these two characters is returned.
May 08, 2021 pm 04:34 PM
How to set utf8 encoding in eclipse
Setting method: First open the eclipse software; then click the "Window"-"Preferences"-"General"-"Workspace" option; finally, in the opened interface, find the "Text file encoding" item and select the "UTF-8" format That’s it.
May 08, 2021 pm 02:43 PM
What are java static variables
In Java, static variables refer to variables of classes modified by static; static variables are shared by all class instance objects, have only one copy in memory, and will be initialized when and only when the class is first loaded.
May 08, 2021 pm 12:01 PM
How to convert string to char array in java
In Java, you can use the toCharArray() method to convert a string into a char character array. The syntax format is "String variable.toCharArray()" and the return value is a character array.
May 08, 2021 am 11:47 AM
What are the java output statements?
The output statements are: 1. Print "System.out.println()" with line breaks; 2. Print "System.out.print()" without line breaks; 3. Byte output "System.out.write()"; 4. Output "System.out.printf()" in format.
May 07, 2021 pm 05:06 PM
How to set eclipse language to Chinese
Method: 1. Find the language pack download URL and copy it; 2. Open eclipse and click "help" - "Install New Software" - "Add"; 3. Paste the URL in "Location" and click "Add"; 4 , check "Simplified Chinese Package"; 5. Wait for loading to complete and restart.
May 07, 2021 pm 03:58 PM
What is the difference between static methods and non-static methods in java
Differences: 1. Static methods are methods modified with the static keyword, which belong to classes, not objects; non-static methods are ordinary methods that are not modified with the static keyword, and belong to objects, not classes. 2. Static methods can be called directly, class name calls and object calls; non-static methods can only be called through objects. 3. Different life cycles.
May 07, 2021 pm 02:23 PM
What are the shortcut keys for IDEA?
This article will introduce to you the shortcut keys of IDEA. It has certain reference value. Friends in need can refer to it. I hope it will be helpful to everyone.
May 06, 2021 am 09:45 AM
How to decompile class files into java files
Method: 1. Download the "jad.exe" plug-in and place it in the same directory as the ".class" file; 2. Open the cmd command window and use the cd command to enter the directory where "Jad.exe" is located; 3. Execute "Jad -d java file storage path -sjava class file path" command can be used.
Apr 26, 2021 pm 02:00 PM
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