/// <summary>
/// Returns the installed java version and the architecture
/// </summary>
public static JavaVersionInformation GetJavaVersionInformation()
{
JavaVersionInformation information = new JavaVersionInformation();
Process process = new Process();
List<string> output = new List<string>();
// Always fetch the latest value of Path variable to update the cached value.
Environment.SetEnvironmentVariable("Path",
Environment.GetEnvironmentVariable("Path", EnvironmentVariableTarget.Machine),
EnvironmentVariableTarget.Process);
process.StartInfo.WindowStyle = ProcessWindowStyle.Hidden;
process.StartInfo.CreateNoWindow = true;
process.StartInfo.FileName = "cmd.exe";
process.StartInfo.UseShellExecute = false;
process.StartInfo.RedirectStandardOutput = true;
process.StartInfo.RedirectStandardError = true;
process.StartInfo.Arguments = "/c \"" + "java -version " + "\"";
process.OutputDataReceived += new DataReceivedEventHandler((s, e) =>
{
if (e.Data != null)
{
output.Add((string)e.Data);
}
});
process.ErrorDataReceived += new DataReceivedEventHandler((s, e) =>
{
if (e.Data != null)
{
output.Add((String)e.Data);
}
});
process.Start();
process.BeginOutputReadLine();
process.BeginErrorReadLine();
process.WaitForExit();
string versionLine = output.Where(x => x.StartsWith("java version", StringComparison.InvariantCultureIgnoreCase)).FirstOrDefault();
if (process.ExitCode == 0)
{
information.Version = versionLine.Substring(14, 3);
information.Architecture = output.Any(x => x.Contains("64-Bit")) ? Architecture.x64 : Architecture.x86;
}
return information;
}
/// <summary>
/// Returns the installed java version and the architecture
/// </summary>
public static JavaVersionInformation GetJavaVersionInformation()
{
JavaVersionInformation information = new JavaVersionInformation();
Process process = new Process();
List <string> output = new List <string>();
// Always fetch the latest value of Path variable to update the cached value.
Environment.SetEnvironmentVariable("Path",
Environment.GetEnvironmentVariable("Path", EnvironmentVariableTarget.Machine),
EnvironmentVariableTarget.Process);
process.StartInfo.WindowStyle = ProcessWindowStyle.Hidden;
process.StartInfo.CreateNoWindow = true;
process.StartInfo.FileName = "cmd.exe";
process.StartInfo.UseShellExecute = false;
process.StartInfo.RedirectStandardOutput = true;
process.StartInfo.RedirectStandardError = true;
process.StartInfo.Arguments = "/c \"" + "java -version " + "\"";
process.OutputDataReceived += new DataReceivedEventHandler((s, e) =>
{
if (e.Data != null)
{
output.Add((string)e.Data);
}
});
process.ErrorDataReceived += new DataReceivedEventHandler((s, e) =>
{
if (e.Data != null)
{
output.Add((String)e.Data);
}
});
process.Start();
process.BeginOutputReadLine();
process.BeginErrorReadLine();
process.WaitForExit();
string versionLine = output.Where(x => x.StartsWith("java version", StringComparison.InvariantCultureIgnoreCase)).FirstOrDefault();
if (process.ExitCode == 0)
{
information.Version = versionLine.Substring(14, 3);
information.Architecture = output.Any(x => x.Contains("64-Bit")) ? Architecture.x64 : Architecture.x86;
}
return(information);
}
/// <summary>
/// Compares if the installed version of java matches with the operating system's
/// </summary>
public static bool IsExpectedJavaVersionInstalled(JavaVersionInformation information, string version)
{
bool result = false;
if (((information.Architecture == Architecture.x64 &&
System.Environment.Is64BitOperatingSystem) ||
(information.Architecture == Architecture.x86 &&
!System.Environment.Is64BitOperatingSystem)) &&
information.Version.CompareTo(version) >= 0)
{
result = true;
}
return(result);
}
/// <summary>
/// Compares if the installed version of java matches with the operating system's
/// </summary>
public static bool IsExpectedJavaVersionInstalled(JavaVersionInformation information, string version)
{
bool result = false;
if (((information.Architecture == Architecture.x64 &&
System.Environment.Is64BitOperatingSystem) ||
(information.Architecture == Architecture.x86 &&
!System.Environment.Is64BitOperatingSystem)) &&
information.Version.CompareTo(version) >= 0)
{
result = true;
}
return result;
}
