Implementing a Java Program.pptx

Implementing a Java Program.pptx

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  Implementing a Java Program Prof.Yashoda M B Assistant Professor in Computer Science (UG) Kristu Jayanti College, Autonomous (Reaccredited A++ Grade by NAAC with CGPA 3.78/4) Bengaluru – 560077, India
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  Implementation of ajava application program involves a series of steps: Creating a program Compiling a program Running a program 17/11/2023 Prof. Yashoda M B 2
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  Creating a program We can create program using any text editor.  Assume that we have entered the following program. Class Sample { public static void main(String args [] ) { int a=10,b=20; System.out.println(“The sum of two numbers=” + (a + b)); } } 17/11/2023 Prof. Yashoda M B 3
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  Compiling the program We must rum the java compiler javac, with the source file on the command line as shown below: javac Sample.java  If everything is OK, the javac compiler creates a file called Sample.class containing the bytecodes of the program.  The compiler automatically names the bytecode file as <classname>.class 17/11/2023 Prof. Yashoda M B 4
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  Running a program We need to use java interpreter to run a standalone program.  At the command prompt, type Java Sample  Now interpreter looks for the main method in the program and begins execution from there.  When executed, our program displays the following: The sum of two numbers=30  Java compiler converts the source code files into machine independent bytecode files that can run on any machine.  Java interpreter reads the bytecode files and translates them into machine code for the specific machine on which java program is running. 17/11/2023 Prof. Yashoda M B 5