Goal: To run a Java program using Command Prompt. Pressing the enter button will guide you to the specified directory. We use Java compiler javac to compile Java program and the Java interpreter java to run the Java program. Here Java Program is the directory name where our java program is located. We can divide the nanoseconds by 1,000,000,000 to obtain the execution time in seconds.Īny questions please feel free to drop in your comments. To do so, open the windows command prompt and type the below mentioned command to enter the directory where the java program is saved: cd Java Program. Step 3) Now, open the command prompt and open the directory in which we have saved our program by using the following command. Note bluej is repeated twice.) With Windows at home: You.
The execution time obtained is in Nanoseconds. WINDOWS Lab CC 103: Go to the Start Menu, select Programs (not Loyola Software), and then BlueJ.In the end, we initialise another variable with System.nanoTime() and subtract both the time variables to get the execution time.
How to run a bluej program in cmd code#
Next, we write the code we want to execute.Firstly we initialise a variable with System.nanoTime() a method, which returns the current value of the system time, in nanoseconds.The program takes 2560502743 nanoseconds that is 2.560502743 seconds to execute. The command-line tools for Kotlin to JVM compilation are kotlinc and.
How to run a bluej program in cmd how to#
("The program takes "+exec+" nanoseconds that is "+inSeconds+" seconds to execute.") In this section, we learn how to compile and run java program step by step. ("Multiplication of two numbers is: "+mul) ĭouble inSeconds = (double)exec / 1_000_000_000.0 Public static void main(String args)throws IOExceptionīufferedReader br = new BufferedReader(new InputStreamReader(System.in)) Code to calculate the execution time of a Program import java.io.* Hence for faster execution of programs with multiple threads, we use the BufferedReader class. Using an object of BufferedReader classīufferedReader is a bit faster when compared to scanner as scanner does parsing of input data while BufferedReader simply reads the sequence of characters.Java is an object-oriented language (i.e) everything is in objects and classes, therefore, we have two ways of taking inputs from the user. So in this tutorial, we will learn how we can Calculate the execution time of a program in Java.
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