Difference Between Thread Class vs. Runnable Interface in Java

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Main Difference

The difference between thread class and runnable interface in java is that in thread class each thread creates a unique object and get associated with it whereas in the runnable interface in java multiple threads share the same objects.

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Thread Class vs. Runnable Interface in Java

Java is an object-oriented programming language that uses both compiler and interpreter. Mostly all software’s are made in Java programming language. Java code can be written on Windows, Linux, and Mac OS. The syntax of C and C++ programming language is quite the same. Java produces browser to run programs that help in making a graphical user interface. Java programming language is in used and trend these days. To write Java code, a programmer needs software development kit (SDK) that includes a compiler, interpreter that is not required in C++. The thread is program execution that uses the process resources for the task. The process contains thread; the process is a container and thread is a content of that container. The kernel of operating system allocates a stack and a thread control block to each thread. The thread control block is responsible for switching between the threads of the same process. There are types of threads such as kernel-lever threads, user-level threads, hybrid threads. There are further three states of thread such as running, ready and blocked. There is priority property in threads in this way there are multiple threads are active. One system can create one thread. The thread can share data and information whereas process cannot. In multithreading, multiple threads are created. There is an object class, and this object class implements a runnable interface. Like a normal class thread class has a constructor and destructor and methods that create and operate on the threads. There is a direct association in thread class where each class is associated with a thread. Java does no support multiple inheritances that are the reason that it does not create multiple threads. Overriding methods are used in thread class. A class mthreads is created and extends thread class this overrides a run method of thread class. In main a method is created that uses the thread object that invoked the start() method to start the process. A thread in multithreading is a process means a code segment of a process. A thread has its own thread ID, program counter, registers, and stack. If we create separate processes for each service, then each processor share code, data and system resources. If we do not create threads, the system can get exhausted. Creating threads can make processor easy for working. The responsiveness is increased in multithreading, and this is the best advantage of using multithreading. The big advantage of multithreading is resource sharing and in resource sharing the several threads of a process share same code. If we talk about the main difference between thread class and runnable interface in java, then the main difference between thread class and runnable interface in java is that in thread class each thread creates a unique object and get associated with it whereas in the runnable interface in java multiple threads share same objects. In thread class, each thread creates a unique object and get associated with it. A class in java.lang package is known as thread class in java. There is child parent relationship in thread class in java. In runnable interface, in java, multiple threads share the same objects. Like thread class runnable is also an interface in java.lang package. To define a thread, a runnable interface is created.

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Comparison Chart

BasisThread classRunnable interface
MeaningIn thread class, each thread creates a unique object and get associated with itIn the runnable interface, in java, multiple threads share the same objects.
MemoryIn thread memory, very object has a unique memoryIn the runnable interface, all object share the same memory
UseOverride method is used in thread classOverride method is not used in the runnable interface
CouplingIn thread class, there is tight couplingIn runnable interface there loose coupling

What is the thread class?

In thread class, each thread creates a unique object and get associated with it. A class in java.lang package is known as thread class in java. There is an object class, and this object class implements a runnable interface. Like a normal class thread class has a constructor and destructor and methods that create and operate on the threads. There is a direct association in thread class where each class is associated with a thread. Java does no support multiple inheritances that is the reason that it does not create multiple threads. Overriding methods are used in thread class. A class mthreads is created and extends thread class this overrides a run method of thread class. In main a method is created that uses the thread object that invoked the start() method to start the process. There is child parent relationship in thread class in java.

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What is Runnable interface?

In runnable interface in java multiple threads share same objects. Like thread class runnable is also an interface in java.lang package. To define a thread a runnable interface is created. The thread is program execution that uses the process resources for the task. Process contains thread; process is a container and thread is a content of that container. The kernel of operating system allocates a stack and a thread control block to each thread. The thread control block is responsible for switching between the threads of the same process. There are types of threads such as kernel-lever threads, user-level threads, hybrid threads. There are further three states of thread such as running, ready and blocked. There is priority property in threads in this way there are multiple threads are active. One system can create one thread. The thread can share data and information whereas process cannot. In multithreading, multiple threads are created. A thread in multithreading is a process means a code segment of a process. A thread in the runnable interface has its own thread ID, program counter, registers, and stack. If we create separate processes for each service, then each processor share code, data and system resources. If we do not create threads, the system can get exhausted. Creating threads can make processor easy for working. The responsiveness is increased in multithreading, and this is the best advantage of using multithreading. The big advantage of runnable interface in java is resource sharing and in resource sharing the several threads of a process share same code.

Key Differences

  1. In thread class, each thread creates a unique object and get associated with it whereas in the runnable interface in java multiple threads share the same
  2. In thread memory, very object has unique memory whereas in runnable interface all object shares the same
  3. Override method is used in the thread class whereas override method is not used in the runnable
  4. In thread class, there is tight coupling whereas in runnable interface there loose coupling.

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