Ruannable vs Callable

"The Callable interface is similar to Runnable, in that both are designed for classes whose instances are potentially executed by another thread. A Runnable, however, does not return a result and cannot throw a checked exception."

Runnable	Callable>
Introduced in Java 1.0	Introduced in Java 1.5 as part of java.util.concurrent library
Runnable cannot be parametrized	Callable is a parametrized type whose type parameter indicates the return type of its run method
Classes implementing Runnable needs to implement run() method	Classes implementing Callable needs to implement call() method
Runnable.run() returns no Value	Callable.call() returns a value of Type T
Can not throw Checked Exceptions	Can throw Checked Exceptions
public class RunnableTest implements Runnable {               @Override               public void run() {                          //any processing               } }	import java.util.concurrent.Callable; public class CallableTest implements Callable {            @Override             public String call() throws Exception {                        // any processing                     return new String("I am Callable and can return value and throw checked exception");                }  }