JDK 21 Install Kaise Kare + JAVA_HOME Setup (2026) | Step by Step Hindi #2

JDK 21 install kaise kare aur JAVA_HOME kaise set kare - poora step-by-step, ek bhi step skip nahi. End tak terminal mein java aur javac dono chalenge, aur Maven/Gradle jaise tools ke liye system ready hoga. Is video mein: Pehle check: java -version aur javac -version - purana version ya command not found ka fix Oracle.com se JDK 21 download - sirf official site se Linux par real setup: ~/jdk mein extract, bina sudo/admin password ke ~/.bashrc mein JAVA_HOME aur PATH export (Bash shell ke liye) Windows ke steps: installer exe, Environment Variables mein JAVA_HOME + Path entry Verify: java, javac, echo $JAVA_HOME / where java - naye terminal mein Sabse common errors: purana terminal, JAVA_HOME mein bin lagana, Path order, folder naam guess karna Important notes: Linux ka setup real hai (har command live chalaya gaya hai); Windows ke steps explanatory cards mein samjhaye gaye hain. Video mein dikhai gayi Oracle archive build sirf learning demo ke liye hai. Real project ya production ke liye hamesha latest security update wala JDK use karo, aur uski license zaroor check karo - Oracle ne JDK 21 ki license badli hai (latest update personal/development ke liye free, production ke liye paid subscription lag sakta hai). JAVA_HOME mein kabhi bin mat lagao - bin sirf PATH wali line mein jata hai. Series: Installation #2 (Eclipse install = video #1). Agli video: Oracle Database setup. Playwright Java episodes bhi jaari rahenge. #Java #JDK21 #JAVA_HOME #Hindi #GyanSparks