table-layout:fixed will force the table column width to be determined by the cell width of the first row to avoid the content affecting the layout. 1. Set table-layout:fixed and specify the table width; 2. Set the specific column width ratio for the first row th/td; 3. Use white-space:nowrap, overflow:hidden and text-overflow:ellipsis to control text overflow; 4. Applicable to background management, data reports and other scenarios that require stable layout and high-performance rendering, which can effectively prevent layout jitter and improve rendering efficiency.

Maven is a standard tool for Java project management and construction. The answer lies in the fact that it uses pom.xml to standardize project structure, dependency management, construction lifecycle automation and plug-in extensions; 1. Use pom.xml to define groupId, artifactId, version and dependencies; 2. Master core commands such as mvnclean, compile, test, package, install and deploy; 3. Use dependencyManagement and exclusions to manage dependency versions and conflicts; 4. Organize large applications through multi-module project structure and are managed uniformly by the parent POM; 5.

To generate hash values using Java, it can be implemented through the MessageDigest class. 1. Get an instance of the specified algorithm, such as MD5 or SHA-256; 2. Call the .update() method to pass in the data to be encrypted; 3. Call the .digest() method to obtain a hash byte array; 4. Convert the byte array into a hexadecimal string for reading; for inputs such as large files, read in chunks and call .update() multiple times; it is recommended to use SHA-256 instead of MD5 or SHA-1 to ensure security.

SetupaMaven/GradleprojectwithJAX-RSdependencieslikeJersey;2.CreateaRESTresourceusingannotationssuchas@Pathand@GET;3.ConfiguretheapplicationviaApplicationsubclassorweb.xml;4.AddJacksonforJSONbindingbyincludingjersey-media-json-jackson;5.DeploytoaJakar

Understand the core components of blockchain, including blocks, hashs, chain structures, consensus mechanisms and immutability; 2. Create a Block class that contains data, timestamps, previous hash and Nonce, and implement SHA-256 hash calculation and proof of work mining; 3. Build a Blockchain class to manage block lists, initialize the Genesis block, add new blocks and verify the integrity of the chain; 4. Write the main test blockchain, add transaction data blocks in turn and output chain status; 5. Optional enhancement functions include transaction support, P2P network, digital signature, RESTAPI and data persistence; 6. You can use Java blockchain libraries such as HyperledgerFabric, Web3J or Corda for production-level opening

First, use JavaScript to obtain the user system preferences and locally stored theme settings, and initialize the page theme; 1. The HTML structure contains a button to trigger topic switching; 2. CSS uses: root to define bright theme variables, .dark-mode class defines dark theme variables, and applies these variables through var(); 3. JavaScript detects prefers-color-scheme and reads localStorage to determine the initial theme; 4. Switch the dark-mode class on the html element when clicking the button, and saves the current state to localStorage; 5. All color changes are accompanied by 0.3 seconds transition animation to enhance the user

Converting an array into a list in Java requires selecting methods based on the data type and requirements. ① Use Arrays.asList() to quickly convert an object array (such as String[]) into a fixed-size List, but elements cannot be added or deleted; ② If you need a mutable list, you can encapsulate the result of Arrays.asList() through the ArrayList constructor; ③ For basic type arrays (such as int[]), you need to use StreamAPI conversion, such as Arrays.stream().boxed().collect(Collectors.toList()); ④ Notes include avoiding null arrays, distinguishing basic types from object types, and explicitly returning columns

@property decorator is used to convert methods into properties to implement the reading, setting and deletion control of properties. 1. Basic usage: define read-only attributes through @property, such as area calculated based on radius and accessed directly; 2. Advanced usage: use @name.setter and @name.deleter to implement attribute assignment verification and deletion operations; 3. Practical application: perform data verification in setters, such as BankAccount to ensure that the balance is not negative; 4. Naming specification: internal variables are prefixed, property method names are consistent with attributes, and unified access control is used to improve code security and maintainability.