JAVA is an object-oriented, compiled, full-fledged programming language in the spirit of C++. It is designed for some more advanced programmers, with its strength being the ability to run in a “Virtual machine” that can be created by a web browser. JAVA is similar to the programming languages used to build full-fledged applications that can be run on PCs, Macs, and Unix machines. It is well-suited for the Internet, but not necessarily exclusive to the web.
A JAVA assignment is usually difficult for students because it comprises of complex programs. Students are marked not only on the basis of program logic but also on the efficiency of the code. In this article, we will provide you JAVA assignment help by telling the ways with which you can write memory and time efficient JAVA programs.
PROGRAM EFFICIENCY
A program utilizes two major resources of a computer system, namely, computer memory and memory time. These resources are very costly, and therefore, the program should be designed to use them to the minimum possible extent. A program that requires less memory and takes minimum time to execute is called an efficient program. However, the prime concern of a programmer should be the correctness of the program rather than its efficiency. There is no use of designing an efficient program if it cannot produce correct results. The general rule, therefore, should be, first product, a correct program, and then optimize its resource requirements.
Memory
A space requirement of a program becomes too critical when a limited memory is available for use. In a multiprocessing environment, the system can take more programs at a time and process them simultaneously if the space needed for each program is less. Some systems now change for space also. It is, therefore, desirable to take necessary steps to reduce the memory requirements of the program. Some steps are –
- Select an algorithm that needs fewer steps. Remember, it should not be at the cost of accuracy.
- Minimize the number of variables required.
- When a variable is not required anymore in the program, reuse it rather than selecting another variable.
- Minimize the use of string variables.
- Do not store heading lines in memory. Print them directly as string constants.
- When you use array variables, declare their exact size.
- Do not break large expressions into small bits using new variables unless it is essential.
- Do not read anything which can be calculated inside the program.
- Whenever possible, use self-replacement statements.
Execution time
Time is the costliest resource, and a programmer who could come up with ideas and tricks to make a program run faster is considered a good programmer. Saving in time becomes more important when a program is to be used quite often.
Efficiency versus Clarity
When we attempt to produce an efficient program, we should take sufficient care to maintain the clarity and readability of the program. If the programs are to be read and used by other people, then the main goal should be to write a well-structured and readable program which are easier to debug modify and maintain. On the other hand, if a program is to be kept in the library and to be used very often, then the efficiency assumes a higher priority.
Keeping the above points in mind will help you create efficient programs, and you will surely be able to grab good grades.
Summary: This article talks about program efficiency and provides ways through which you can write memory and time efficient JAVA programs for your JAVA assignment.
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