How to check if a string contains a substring in java

First, enable the built-in scaling function of UC browser, go to Settings → Browse Settings → Font and Typesetting or Page Scaling, and select a preset ratio or custom percentage; second, you can force the page display size by opening or pinching gestures with two fingers; for web pages that restrict scaling, you can request the desktop version of the website to unlock the restrictions; advanced users can also modify the viewport attributes by executing JavaScript code in the address bar to achieve a more flexible forced scaling effect.

Real-time systems require deterministic responses, because correctness depends on the result delivery time; hard real-time systems require strict deadlines, missed will lead to disasters, while soft real-time allows occasional delays; non-deterministic factors such as scheduling, interrupts, caches, memory management, etc. affect timing; the construction plan includes the selection of RTOS, WCET analysis, resource management, hardware optimization and rigorous testing.

The answer is to use Thread.currentThread().getStackTrace() to get the call method name, and obtain the someMethod name of the call anotherMethod through index 2. Since index 0 is getStackTrace, 1 is the current method, and 2 is the caller, the example output is "Calledbymethod:someMethod", which can also be implemented by Throwable, but attention should be paid to performance, obfuscation, security and inline impact.

Java exception handling catches exceptions through try-catch blocks, finally blocks ensure resource cleanup, try-with-resources automatically manage resources, throws declare exceptions, custom exceptions to deal with specific errors, and follows best practices such as catching specific exceptions, not ignoring exceptions, and avoiding empty catch blocks, thereby achieving robust and maintainable code.

The Optional class is used to safely handle values ​​that may be null, avoiding null pointer exceptions. 1. Create an instance using Optional.ofNullable to handle null values. 2. Check and access values ​​through isPresent or ifPresent security to avoid direct call to get to cause exceptions. 3. Use orElse and orElseGet to provide default values, or use orElseThrow to throw a custom exception. 4. Convert or filter values ​​through map and filter chain operations to improve code readability and robustness.

Edge occupies a high CPU because of the high consumption of resources based on Chromium kernel, plus factors such as multi-tab pages, plug-in running, website scripts and rendering mechanisms; solutions include: 1. Close unnecessary extensions to reduce the burden on the background; 2. Enable the "Sleep Tag" function to reduce the use of idle tag resources; 3. Clean up the background process and close GPU rendering related settings; 4. Update the browser and system to ensure compatibility and performance optimization.

Use std::transform combined with ::toupper to convert the string to uppercase, such as std::transform(str.begin(), str.end(), str.begin(),::toupper). This method is suitable for ASCII characters. Modify the original string. If you need to keep the original string, you can copy it first. It is recommended to use the ICU library in Unicode scenarios.

Use the getClass() method to get the runtime class of the object, such as str.getClass() to return the Class object; for types, you can directly use the String.class syntax. The Class class provides methods such as getName(), getSimpleName() to obtain class information, such as num.getClass().getSimpleName() to output Integer.