'Getting the list of softwares installed using Java on a computer

How can one get a list of installed software and its version in Java?

java


Solution 1:[1]

There's another question on StackOverflow that checks for the existence of a particular software.

You can make a list of all filepaths that have

HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\CurrentVersion\Uninstall

in the beginning, then take whatever is at the end of this filepath to be the name of the software.

Solution 2:[2]

I think following code might help you. I am new to java so pls edit my code if any changes.

import java.io.IOException;
import java.io.InputStream;
import java.io.StringWriter;
import java.util.ArrayList;
import java.util.HashSet;
import java.util.Iterator;
import java.util.Set;

public class getInstalledAppList {

  private static final String REGQUERY_UTIL = "reg query ";
  private static final String REGSTR_TOKEN = "REG_SZ";
  static String s = REGQUERY_UTIL + "HKEY_LOCAL_MACHINE\\Software"
                    + "\\Microsoft\\Windows\\CurrentVersion\\Uninstall";





public static String getCurrentUserPersonalFolderPath() {
    try {
      Process process = Runtime.getRuntime().exec(s);
      StreamReader reader = new StreamReader(process.getInputStream());

      reader.start();
      process.waitFor();
      reader.join();

      String result = reader.getResult();
      int p = result.indexOf(REGSTR_TOKEN);

      if (p == -1)
         return null;

      return result.substring(p + REGSTR_TOKEN.length()).trim();
    }
    catch (IOException | InterruptedException e) {
      return null;
    }
  }



  static class StreamReader extends Thread {
    private final InputStream is;
    private final StringWriter sw;

    StreamReader(InputStream is) {
      this.is = is;
      sw = new StringWriter();
    }

    @Override
    public void run() {
      try {
        int c;
        while ((c = is.read()) != -1)
          sw.write(c);
        }
        catch (IOException e) { e.printStackTrace(); }
      }

    String getResult() {
      return sw.toString();
    }
  }

  public static void main(String s[]) {

      getDisplayNameDword( getCurrentUserPersonalFolderPath()  );
  }

  private static void getDisplayNameDword(String str){

      Set<String> set = new HashSet<>();

      String [] array = new String[500];


      array = str.split("\n");

      for(String i : array){

          set.add( getName(i.trim()) ); 

      }


      Iterator i = set.iterator();

      while(i.hasNext()){

          System.out.println( i.next() );

      }

  }

  private static String getName(String s){
  Process process = null;
  try {
            // Run reg query, then read output with StreamReader (internal class)
             process = Runtime.getRuntime().exec("reg query " + 
                    '"'+ s + "\" /v " + "DisplayName");

            StreamReader reader = new StreamReader(process.getInputStream());
            reader.start();
            process.waitFor();
            reader.join();


            // Parse out the value
            String[] parsed = reader.getResult().split(REGSTR_TOKEN);
            if (parsed.length > 1) {
            return  (parsed[parsed.length-1]).trim();
            }

       } catch (IOException | InterruptedException e) {
           e.printStackTrace();
       }
  return null;
  }
}

or use psinfo.exe to get installed app list in windows.

Solution 3:[3]

I wrote a little library (JavaListApps) that does this based on ListPrograms which is in turn based on a VB Script linked from a StackOverflow Post

My need is a little limited, so there are unimplemented parts compared to the C++ version.

Sources

This article follows the attribution requirements of Stack Overflow and is licensed under CC BY-SA 3.0.

Source: Stack Overflow

Solution Source
Solution 1 Community
Solution 2 Kushal
Solution 3 drone.ah

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