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How to Install Oracle JDK and Configure VS Code for Java Development


Complete step-by-step guide to install Oracle JDK 17 LTS and set up Visual Studio Code for Java programming with all required extensions and configurations.

🔹 Step-by-Step: Oracle JDK + VS Code Setup

✅ STEP 1: Install Oracle JDK

1️⃣ Download Oracle JDK

👉 https://www.oracle.com/java/technologies/downloads/

  • Choose Java 25 (LTS)
  • Download Windows x64 Installer (.exe)
  • Accept the license

2️⃣ Install

  • Double-click installer
  • Click Next → Install → Finish

  • Default path (recommended):

    C:\Program Files\Java\jdk-25

✅ STEP 2: Verify Oracle JDK Installation

  1. Open Command Prompt
  2. Run:
java -version

Expected output:

java version "25.x.x"
Java(TM) SE Runtime Environment

If this works → Oracle JDK is installed correctly ✔️

✅ STEP 3: Set JAVA_HOME (Important)

1️⃣ Open Environment Variables

  • Press Win + R

  • Type:

    sysdm.cpl
  • Go to Advanced → Environment Variables

2️⃣ Add JAVA_HOME

  • Under System Variables → Click New

    • Variable name:

      JAVA_HOME

    • Variable value:

      C:\Program Files\Java\jdk-25.0.2

3️⃣ Update PATH

  • Select Path → Edit
  • Click New

  • Add:

    %JAVA_HOME%\bin

4️⃣ Click OK → OK

🔁 Close & reopen Command Prompt

Verify again:

javac -version

✔️ Compiler working

✅ STEP 4: Install VS Code

👉 https://code.visualstudio.com

During installation, check these boxes: ✔ Add to PATH ✔ Register Code as an editor

✅ STEP 5: Install Java Extensions in VS Code

  1. Open VS Code
  2. Go to Extensions (Ctrl + Shift + X)
  3. Search:
Extension Pack for Java
  1. Click Install

📦 Includes:

  • Java Language Support
  • Debugger for Java
  • Maven
  • Project Manager

✅ STEP 6: Tell VS Code to Use Oracle JDK

VS Code usually detects it automatically, but let’s be explicit.

1️⃣ Open Settings (JSON)

  • Press Ctrl + Shift + P

  • Type:

    Preferences: Open User Settings (JSON)

2️⃣ Add this:

{
  "java.jdt.ls.java.home": "C:\\Program Files\\Java\\jdk-25.0.2"
}

⚠️ Use double backslashes in Windows paths

Save the file

✅ STEP 7: Create & Run First Java Program

1️⃣ Create Folder

JavaPractice

Open it in VS Code

2️⃣ Create File

HelloWorld.java

3️⃣ Code

public class HelloWorld {
    public static void main(String[] args) {
        System.out.println("Oracle JDK + VS Code works!");
    }
}

4️⃣ Run

  • Click Run ▶ above main() OR
javac HelloWorld.java
java HelloWorld

🎉 Output:

Oracle JDK + VS Code works!

🔹 Common Issues & Fixes

❌ javac is not recognized

✔ JAVA_HOME not set correctly ✔ PATH not updated ✔ Restart Command Prompt / VS Code

📘 Related Topics