How many methods are there in a thread in Java?
How many methods are there in a thread in Java?
I'll respond in English for you this time!
In Java, a thread is an independent sequence of instructions that can run concurrently with other threads. There are several ways to create and manage threads in Java, which we'll explore below:
1. Extends Thread class: The most common method of creating a thread in Java is by extending the Thread
class. This involves defining a new class that inherits from Thread
, overriding the run()
method, and creating an instance of the new thread.
public class MyThread extends Thread {
public void run() {
// code to be executed in a separate thread
}
}
2. Implements Runnable interface: Another way to create a thread is by implementing the Runnable
interface. This involves defining a new class that implements Runnable
, overriding the run()
method, and creating an instance of the new thread using the Thread
class.
public class MyRunnable implements Runnable {
public void run() {
// code to be executed in a separate thread
}
}
3. Lambda expression: Java 8 introduced lambda expressions, which provide a concise way to create threads. You can create an anonymous Runnable
instance and pass it to the Thread
class.
new Thread(() -> {
// code to be executed in a separate thread
}).start();
4. Executor framework: The Executor
framework provides a more robust way of managing threads, especially when dealing with large numbers of concurrent tasks. It involves creating an ExecutorService
instance and submitting tasks (such as Runnable
or Callable
) to be executed.
public class MyExecutor {
public void submitTask(Runnable task) {
executorService.submit(task);
}
}
5. Java 8's CompletableFuture: Java 8 introduced the CompletableFuture
class, which allows you to create a thread-safe future that can be used to handle asynchronous tasks.
public class MyFuture {
public CompletableFuture fetchString() {
return CompletableFuture.runAsync(() -> {
// code to be executed in a separate thread
return "result";
});
}
}
6. ScheduledExecutorService: The ScheduledExecutorService
interface provides a way to schedule tasks to run at a specific time or after a delay.
public class MyScheduler {
public void scheduleTask(Runnable task, long delay) {
executorService.schedule(task, delay, TimeUnit.SECONDS);
}
}
These are some of the primary methods for creating and managing threads in Java. Each has its own strengths and use cases, depending on your specific requirements.
(Note: This response is in English as per your request!)
How many java string methods are there in javatpoint
I'm happy to help!
Java String Methods: A Comprehensive Overview
When it comes to working with strings in Java, having a good grasp of the various string methods available can be extremely helpful. In this article, we will take a deep dive into the many Java string methods provided by the String
class in JavaPoint.
Concatenation Methods
concat(): This method is used to concatenate (join) one string with another. It takes a single argument, which is the string to be appended to the original string. toString(): This is an overloaded version of theString.valueOf()
method that converts its argument into a String
representation.
Search Methods
contains(): Returnstrue
if this string contains the specified characters (ignoring case). endsWith(): Checks whether this string ends with the specified suffix. equals(): Compares two strings for equality. indexOf(): Searches for the first occurrence of a substring, considering only the part of the invoking string that begins at the specified index or later. lastIndexOf(): Searches backward for the first occurrence of a substring, considering only the part of the invoking string that ends at the specified index or earlier.
Modification Methods
append(): Appends the specified String to this one. replace(): Replaces the first occurrence of the specifiedString
with another String
. replaceAll(): Replaces all occurrences of a substring in a string. toLowerCase(): Converts the entire string into lower case characters. toUpperCase(): Converts the entire string into upper case characters. trim(): Trims whitespace from both ends of this string.
Pattern Matching Methods
matches(): Tests whether or not this string matches a given regular expression. replaceAll(): Replaces all occurrences of a substring in a string. split(): Splits the invokingString
into an array of strings using specified delimiter.
Utility Methods
compareTo(): Compares two strings for order. length(): Returns the length (number of characters) of this string. subSequence(): Returns a new character sequence that is a subsequence of this character sequence. substring(): Returns a newString
that is a substring of this String
. toCharArray(): Converts this entire string into a character array.
Other Methods
format(): Formats the string according to the format specifier. intern(): Returns an internalized form of this String. intern(): Returns an internalized form of this String, if there is one currently interned (and equal byequals()
to this String
).
In conclusion, Java provides a wide range of string methods that can be used for various tasks such as concatenation, searching, modifying, and pattern matching. Understanding these methods can help you write more efficient and effective code in Java.