Installing SDK but it refuge cause of missing java - Installed but stil the same, even restarted the installation

Hi i was about to install Android SDK Tool when a screen said "Java SE Development Kit" wasn`t installed, OK so i installed it "Java Development Kit Version 6 Update 23" but th开发者_运维百科e screen stil say its not installed, do i need to restart my computer? its said go to java.sun.com bla bla before continued, nothing about restart the computer, hae restarted the installation but stil the same.

Make sure the Java JDK is in your PATH (Right-click Computer, select Properties, Advanced System Settings, Environment) and then re-try the installation.

Also look at this SO question.