Q&A for How to Compile & Run Java Program Using Command Prompt

It is okay. You have to write for compiling : javac filename.java and for running: just filename.

Once you are in the correct directory, you can compile the program by typing "javac filename.java" into the command line and pressing enter.

You can't without installing other things. CMD is NOT for hacking and should never be used for it.

After you defined the directory, you have to do the following: 1) Copy : C:\Program Files\Java\jdkvesion\bin 2) Specify the jdk version 3) Copy the path then you have to write inside cmd set path="C:\Program Files\Java\jdk1.8.0_91\bin"

This means that you either do not have JDK installed or you do not have the javac binary added to your PATH environment variable. Try reinstalling the JDK or looking up how to add javac to your PATH environment variable for your operating system.

"javac" is short for Java Compiler. It's the service that compiles your Java into more computer readable code.

Make sure that you are replacing "filename" with the actual name of your .java file. If it is still not working, there was an error in your code, check your syntax and try again.

I would guess you have been trying to run with "java test.java," whereas you should actually use "java test." This is for two reasons: firstly, test.java would refer to the java source file when you need the (compiled) class itself; secondly, the "java" command only wants the class name, not the file name.

Either you don't have java jdk on your system or the file does not exist.

This depends entirely upon where you saved your Java programs. Assume you saved the Java programs in C:\temp\Java (replace with whatever directory you saved your files to); you'd enter the command CD C:\temp\Java and then use DIR to list contents of the folder. If any component of the folder path has one or more non alpha-numeric characters (i.e. space), you must use a double quote to begin the path name, i.e. CD "C:\temp\Java Programs".

Yes, you can run multiple files at the same time. You can use multiple windows, multitasking, a batch file, or a script. However, be aware that running multiple files can be resource-intensive and may slow down your computer, so ensure it has enough RAM and processing power.

To determine if a default constructor is created in a Java program, use the `javap` tool from the command prompt: 1. Compile your Java class with `javac YourClassName.java`. 2. Use `javap -c YourClassName` to disassemble the bytecode. 3. Look for the default constructor in the output, identified by `()` without any arguments. If found, it indicates the presence of a default constructor provided by the compiler.

This means that your file name or working directory might be incorrect. Double-check the spelling and path.

Make sure your class file is in the correct directory and that your classpath is properly set. After compiling with "javac filename.java," use "java filename" without the ".java" extension to run the program.

You can run multiple commands in Command Prompt by using special characters to separate them.

Running a Java program using the command java Filename.java is not correct.

To compile and run a Java application, first download and install the Java Development Kit (JDK). Write your Java code in a text editor or an IDE like IntelliJ IDEA or Eclipse. Save the file with a .java extension. Open Command Prompt, navigate to the directory where your file is saved, and use `javac YourFileName.java` to compile. Then, use `java YourFileName` to run the program.

In Java, the ".class" extension is not included when referring to filenames because it is automatically added by the Java compiler. When you compile a Java file (with a ".java" extension), the compiler generates a bytecode file with the same name but with a ".class" extension. This bytecode file contains the compiled Java code that the Java Virtual Machine (JVM) can understand and execute. You refer to the filename without adding ".class" because the compiler handles creating the bytecode file for you.

Open the notepad and write a Java program into it. Save the Java program by using the class name followed by . java extension. Open the CMD, type the commands and run the Java program.

Click Start, point to Settings, and then click the Control Panel. In the Control Panel, double-click the Add/Remove Programs. On the Install/Uninstall tab, click the Java version you want to uninstall, and then click Add/Remove. When you are prompted to continue with the Uninstall, click Yes.