Question

I want to find the version number of the current version of Java installed on the computer and the current version of Flash installed on any given web browser that has flash. Is there a way to do this using Java, C, or C++? If so, what class/library should I look into?

Answer 1

If you are in Java

    System.out.println(System.getProperty("java.version"));
    System.out.println(System.getProperty("java.vendor"));
    System.out.println(System.getProperty("java.vm.name"));

output

1.7.0_03
Oracle Corporation
Java HotSpot(TM) Client VM

there are more props about Java

    for(Map.Entry e  : System.getProperties().entrySet()) {
        if (((String)e.getKey()).startsWith("java")) {
            System.out.println(e);
        }
    }

.

java.runtime.name=Java(TM) SE Runtime Environment
java.vm.version=22.1-b02
java.vm.vendor=Oracle Corporation
java.vendor.url=http://java.oracle.com/
java.vm.name=Java HotSpot(TM) Client VM
java.vm.specification.name=Java Virtual Machine Specification
java.runtime.version=1.7.0_03-b05
....

As for other languages I think you can do it by running %JAVA_HOME%/java -version from your app, reading the output

java version "1.7.0_03"
Java(TM) SE Runtime Environment (build 1.7.0_03-b05)
Java HotSpot(TM) Client VM (build 22.1-b02, mixed mode, sharing)

Or you can right a JavaProps app like the above, run it as %JAVA_HOME%/java JavaProps and read the output