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Home Development Tools notepad How to run java code in notepad

How to run java code in notepad

Apr 16, 2025 pm 07:39 PM
linux notepad

Although Notepad cannot run Java code directly, it can be achieved by using other tools: using the command line compiler (javac) to compile the code and generate a bytecode file (filename.class). Use the Java interpreter (java) to interpret bytecode, execute the code and output the result.

How to run java code in notepad

Run Java code in Notepad

Notepad is a basic text editor that cannot run Java code directly. Other tools are required to run Java code, such as a Java compiler or a Java interpreter.

method:

  1. Using the command line compiler (javac)
  • Open a command prompt (Windows) or terminal (Mac/Linux).
  • Navigate to the directory where the file containing the Java code resides.
  • Compile Java files with the following command: javac filename.java
  • This will generate a bytecode file named filename.class .
  1. Using Java Interpreter (java)
  • Open a command prompt or terminal.
  • Run Java code with the following command: java filename
  • This will directly interpret the Java code without compilation steps.

Notice:

  • Make sure that the Java Runtime Environment (JRE) is installed on the computer.
  • Make sure that the Java file syntax is correct and does not contain errors.
  • The file extension must be .java and the bytecode file must be .class .

Example:

  1. Compiled with javac :
 <code>javac HelloWorld.java</code>
  1. Run with java :
 <code>java HelloWorld</code>

The above code will output the following:

 <code>Hello, World!</code>

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