Process vs. Thread in Java: What's the Difference?

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Key Difference

The difference between process and thread is that process is the program in execution whereas thread in java is the part of that running program.

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Process vs. Thread 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++. Multitasking is performed in Java; multitasking is when more than one processes run at the same time. Process and thread in java are because of multitasking. If we talk about the main difference between process and thread in java, then the main difference between process and thread is that process is the program in execution whereas thread in java is the part of that running program. The program that is executing itself is known as a process. When you click on any application and then it starts we say that a process has been started. Every process is assigned address space. The address space does not overlap with other process address space. There can be multiple processes, the system that has more than one processor is known as a multiprocessing system. More than two processors are added to increase the power of the computer. CPU has set of registers the process is stored in these registers. For example, if the process of addition of two numbers is made the integers will be saved in registers and the addition of number is also stored in a register. If there will be more than one process, there will be more registers than if one processor will do work and other will be free in this way power of the computer is increased. There are types of processors such as symmetric multiprocessing and asymmetric multiprocessing. If we talk about symmetric multiprocessing, in symmetric multiprocessing the processor is free to run and can run any process whereas in the case of multithreading there is a master-salve relationship. In multiprocessing, there is an integrated memory controller that job of the integrated memory controller is to add more memory.  The threads are most used in JAVA and are used in Java enabled browsers. Thread in java is the part of that running program.  In multithreading, multiple threads are created.  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. Two most important concepts in computer science are multiprocessing and multithreading. Multiprocessing is the process that adds CPU’S to power whereas multithreading is the process that creates multiple threads of the single process that add more power to the computer. The work of multiprocessing and multithreading is to add more power to the computer. The consumption of memory by any processing effect the power of the computer, by using the techniques of multiprocessing and multithreading the efficient use of computer power is made. The system that has more than one processor is known as a multiprocessing system. More than two processors are added to increase the power of the computer. CPU has set of registers the process is stored in these registers. For example, if the process of addition of two numbers is made the integers will be saved in registers and the addition of number is also stored in a register. If there will be more than one process, there will be more registers than if one processor will do work and other will be free in this way power of the computer is increased.

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Comparison Chart

BasisProcess Thread
MeaningThe process is the program in executionThread in java is the part of that running program.
MultitaskingMultiprocessing is the process that adds CPU’S to powerMultithreading is the process that creates multiple threads of the single process that add more power to the computer.
SwitchingContext switching between two processContext switching between two thread
Address Process have separate address spaceThread share same address space

 What is Process?

The program that is executing itself is known as a process. When you click on any application and then it starts we say that a process has been started. Every process is assigned address space. The address space does not overlap with other process address space. There can be multiple processes, the system that has more than one processor is known as a multiprocessing system. More than two processors are added to increase the power of the computer. CPU has set of registers the process is stored in these registers. For example, if the process of addition of two numbers is made the integers will be saved in registers and the addition of number is also stored in a register. If there will be more than one process, there will be more registers than if one processor will do work and other will be free in this way power of the computer is increased. There are types of processors such as symmetric multiprocessing and asymmetric multiprocessing. If we talk about symmetric multiprocessing, in symmetric multiprocessing the processor is free to run and can run any process whereas in the case of multithreading there is a master-salve relationship. In multiprocessing, there is an integrated memory controller that job of the integrated memory controller is to add more memory.

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What is Thread?

The threads are most used in JAVA and are used in Java enabled browsers. Thread in java is the part of that running program.  In multithreading, multiple threads are created.  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.

Key Differences

  1. The process is the program in execution whereas thread in java is the part of that running program.
  2. Multiprocessing is the process that adds CPU’S to power whereas Multithreading is the process that creates multiple threads of the single process that add more power to the computer.
  3. Context switching between two processes whereas Context switching between two thread.
  4. Process have separate address space whereas thread shares same address space.

Explanatory Video