java run command line linux

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certainly! running java programs from the command line in a linux environment involves a few steps, including installing the java development kit (jdk), writing your java code, compiling it, and then running it. here’s a step-by-step tutorial:

### step 1: install java development kit (jdk)

before you can run java programs, you need to have the jdk installed. you can install openjdk using your package manager. for example, on ubuntu, you can run:
you can verify if java is installed by checking the version:
### step 2: write a java program

create a simple java program using a text editor. let’s create a program called `helloworld.java`. you can use `nano`, `vim`, or any other text editor of your choice.
add the following code to `helloworld.java`:
save the file and exit the editor (in nano, you can do this by pressing `ctrl + x`, then `y`, and `enter`).

### step 3: compile the java program

to compile your java program, use the `javac` command followed by the name of your java file:
this command will produce a file named `helloworld.class` in the same directory, which contains the bytecode for your java application.

### step 4: run the java program

now, you can run your compiled java program using the `java` command followed by the name of the class (without the `.class` extension):
if everything is set up correctly, you should see the output:
### summary of commands

here’s a quick summary of the commands you used:

1. install openjdk (if not installed):


2. create and write a java file:


3. compile the java file:


4. run the java program:


### additional tips

1. **checking java installation**: if you want to check your current java installation, you can use:


2. **setting java_home**: if you need to set the `java_home` environment variable, you can add the following lines to your `~/.bashrc` or `~/.bash_profile` file:


after adding these lines, run `source ~/.bashrc` to apply the changes.

3. **running with clas ...

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