java run 2 threads simultaneously

certainly! running multiple threads simultaneously in java is a fundamental concept for achieving concurrent execution and making efficient use of system resources. below is a tutorial that explains how to create and run two threads simultaneously in java, along with a code example.

### java threads overview

in java, you can create threads in two primary ways:
1. by extending the `thread` class.
2. by implementing the `runnable` interface.

### creating threads

1. **extending the thread class**:
- you can create a new class that inherits from `thread` and override its `run()` method.
- when you create an instance of this class and call its `start()` method, a new thread will be created.

2. **implementing the runnable interface**:
- you can create a class that implements the `runnable` interface and override its `run()` method.
- you then create a `thread` object, passing an instance of your `runnable` class to it, and call `start()` on the `thread` object.

### example: running two threads simultaneously

here is a complete example demonstrating both methods of creating threads. in this example, we will create two threads that print numbers in their respective ranges.

### explanation of the code

1. **threadexample1**:
- this class extends the `thread` class.
- the `run()` method prints numbers from `start` to `end`, pausing for 500 milliseconds between prints.

2. **threadexample2**:
- this class implements the `runnable` interface.
- similar to `threadexample1`, it prints numbers in its range, also pausing for 500 milliseconds.

3. **multithreadexample**:
- in the `main` method, we create an instance of `threadexample1` and call `start()` to run it.
- we also create a `thread` object with `threadexample2` and call `start()` on it.
- the `join()` method is called on both threads to ensure the main thread waits for both to complete before printing the final message.

### conclusion

this example demonstrates how to create an ...

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