Fix readme

Signed-off-by: Arthur Chan <[email protected]>

frontends/java/README.md

@@ -2,40 +2,48 @@
 
 This is work in progress.
 
+Download and install java / maven in ubuntu
+-----------------------------------------
+sudo apt-get install -y openjdk-8-jdk-headless maven
+
+
 Using java-callgraph
 -----------------------------------------
-Depends on OpenJDK+JRE 11.0 or later
+Depends on OpenJDK+JRE 8 or later
+
 Depends on https://github.com/gousiosg/java-callgraph, which has compiled and packed as a jar file (javacg-0.1-SNAPSHOT-static.jar)
 
 It requires the target source code compiled and packed into jar file.
 
 The resulting call tree are shown in stdout.
 
 Example of running: `java -jar javacg-0.1-SNAPSHOT-static.jar <TARGET_JAR_FILE>`
-------------------------------------------
 
 
 Using IBM's WALA
 ------------------------------------------
-Depends on OpenJDK+JRE 11.0 or later
+Depends on OpenJDK+JRE 8 or later
+
 Depends on Maven 3.3 or later
+
 Depends on IBM's WALA https://github.com/wala/WALA, the maven build process will automatically
+
 download and pack the WALA jar libraries.
 
 The resulting call tree are shown in stdout.
 
 Example of running: `./run.sh <-j | --jarFile> <jarFile1:...:javaFileN> <-e | --entryclass> <Public Entry Class Name>`
-------------------------------------------
 
 
 Using Soot
 ------------------------------------------
-Depends on OpenJDK+JRE 11.0 or later
+Depends on OpenJDK+JRE 8 or later
+
 Depends on Maven 3.3 or later
-Depends on IBM's WALA https://github.com/soot-oss/soot, the maven build process will automatically
-download and pack the Soot jar libraries.
+
+Depends on IBM's WALA https://github.com/soot-oss/soot, the maven build process will automatically download and pack the Soot jar libraries.
 
 The resulting call tree are shown in stdout.
 
-Example of running: `./run.sh <-j | --jarFile> <jarFile1:...:javaFileN> <-c | --entryclass> <Public Entry Class Name>` <-m | --entrymethod <Public Entry Method Name>`
+Example of running: `./run.sh <-j | --jarFile> <jarFile1:...:javaFileN> <-c | --entryclass> <Public Entry Class Name> <-m | --entrymethod <Public Entry Method Name>`