How can I pass parameters to Java threads?

Passing Parameters to Java Threads

When creating multithreaded applications in Java, it often becomes necessary to pass parameters to the threads. This allows you to initialize the threads with specific values or data that they may require to perform their tasks effectively.

Passing Parameters to Regular Threads

To pass parameters to a regular thread created using the Thread class, you need to implement the Runnable interface and pass the parameter into the constructor of the Runnable object. Here's an example:

<code class="java">public class MyRunnable implements Runnable {

    private Object parameter;

    public MyRunnable(Object parameter) {
        this.parameter = parameter;
    }

    public void run() {
        // Use the passed parameter within the thread
    }
}</code>

To start a thread with the passed parameter, create an instance of the MyRunnable class and pass it to the Thread constructor:

<code class="java">Runnable r = new MyRunnable(parameter_value);
new Thread(r).start();</code>

Passing Parameters to Anonymous Classes

When using anonymous classes to create threads, you can pass parameters using the same approach:

<code class="java">new Thread(new Runnable() {

    private Object parameter;

    public Runnable(Object parameter) {
        this.parameter = parameter;
    }

    public void run() {
        // Use the passed parameter within the thread
    }
}).start();</code>

In the anonymous class, you need to pass the parameter to the constructor of the anonymous class. Note that within the anonymous class, you need to define a constructor along with the run() method.

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