step by step installation of Oracle SOA / BPM /OSB 12c

Step1:

 Download Oracle BPM / SOA 12 C and Java latest version

Links to download SOA/ BPM 12c and Java

http://www.oracle.com/technetwork/middleware/soasuite/downloads/index.html

http://www.oracle.com/technetwork/java/javase/8-whats-new-2157071.html

      You will see below JAR files after extracting the downloaded File
                      .  fmw_12.1.3.0.0_soa_quickstart.jar
                      .  fmw_12.1.3.0.0_soa_quickstart2.jar

Step 2: 

 Go to Command prompt as Administrator:

3.  Option1:
                   Install Java and add the path to Environment Variable. 

                    Go to downloaded SOA Jars location and type the following:

                     java -jar fmw_12.1.3.0.0_bpm_quickstart.jar

     Option2 :

                        Go to java bin folder where you have installed latest JDK
                        In my case it is C:\Program Files\Java\jdk1.8.0_25\bin

                        type  java -jar C:\SOA\12C\fmw_12.1.3.0.0_bpm_quickstart.jar

Further proceed with Installer: