Uninstall Old Javas (JREs and JDKs)

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Release Time

06/05/2017

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1321 times

Update Time

06/04/2025

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Java Java Runtime Environment Java Development kit JDK JRE

Some time user has many versions of JAVA (JDK and JRE) but they would like to keep only the latest version of JAVA (only the required version) then Please use the script to keep only latest versions of JRE and JDK on your Windows Machine.

Note:

Please run the script as a System User

If you have the same version of latest x86 and x64 then the script leaves x64 program and uninstalls x86 program from the endpoint.

Please run as System User

Procedure's Instructions

def DNDS(rtkey,pK,kA):
    import re
    ln=[]
    lv=[]
    lus=[]
    try:
        oK=_winreg.OpenKey(rtkey,pK,0,kA)
        i=0
        while True:
            try:
                bkey=_winreg.EnumKey(oK,i)
                vkey=os.path.join(pK,bkey)
                oK1=_winreg.OpenKey(rtkey,vkey,0,kA)
                try:
                    DN,bla=_winreg.QueryValueEx(oK1,'DisplayName')
                    DV,bla=_winreg.QueryValueEx(oK1,'DisplayVersion')
                    US,bla=_winreg.QueryValueEx(oK1,'UninstallString')
                    _winreg.CloseKey(oK1)
                    o=re.search(r'(^java.*|^j2se.*)update.*',DN.lower())
                    if o.group():
                        ln.append(DN)
                        lv.append(DV)
                        lus.append(US)
                except:
                    pass
                i += 1
            except:
                break
        _winreg.CloseKey(oK)
        return zip(ln,lv,lus)
    except:
        return zip(ln,lv,lus)

def ecmd(CMD):
    import ctypes
    class disable_file_system_redirection:
        _disable = ctypes.windll.kernel32.Wow64DisableWow64FsRedirection
        _revert = ctypes.windll.kernel32.Wow64RevertWow64FsRedirection
        def __enter__(self):
            self.old_value = ctypes.c_long()
            self.success = self._disable(ctypes.byref(self.old_value))
        def __exit__(self, type, value, traceback):
            if self.success:
                self._revert(self.old_value)
    from subprocess import PIPE, Popen
    with disable_file_system_redirection():
        OBJ = Popen(CMD, shell = True, stdout = PIPE, stderr = PIPE)
    out, err = OBJ.communicate()
    r=OBJ.returncode
    return r

import _winreg
import os
if 'PROGRAMFILES(X86)' in os.environ.keys():
    f=DNDS(_winreg.HKEY_LOCAL_MACHINE,r'SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall',_winreg.KEY_WOW64_32KEY | _winreg.KEY_READ)
    f.extend(DNDS(_winreg.HKEY_LOCAL_MACHINE,r'SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall',_winreg.KEY_WOW64_64KEY | _winreg.KEY_READ))
    f.extend(DNDS(_winreg.HKEY_CURRENT_USER,r'SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall',_winreg.KEY_WOW64_32KEY | _winreg.KEY_READ))
    f.extend(DNDS(_winreg.HKEY_CURRENT_USER,r'SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall',_winreg.KEY_WOW64_64KEY | _winreg.KEY_READ))
else:
    f=DNDS(_winreg.HKEY_LOCAL_MACHINE,r'SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall',_winreg.KEY_READ)
    f.extend(DNDS(_winreg.HKEY_CURRENT_USER,r'SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall',_winreg.KEY_READ))

if len(f)>0:
    vf=[]
    df=[]
    for i in f:
        vf.append([str(i[0]), [int(k) for k in i[1].split('.')], str(i[2])])
    vf=sorted(vf,key=lambda x:x[1],reverse=True)

print 'Existing JREs: '
    for i in vf[:]:
        if 'Development' not in i[0]:
            print i[0], '.'.join([str(k) for k in i[1]])
        else:
            vf.remove(i)
            df.append(i)
            
    if len(df)>0:
        print '\n'
        print 'Existing JDKs: '
        for i in df:
            print i[0], '.'.join([str(k) for k in i[1]])

if len(df)>1:
        print '\n'
        print 'Removed JDKs: '
        if len(df[2:])>0:
            for i in df[2:]:
                if ecmd(i[-1].replace('MsiExec.exe /I', 'MsiExec.exe /X')+' /qn')==0:
                    print i[0], '.'.join([str(k) for k in i[1]])
        if df[0][1]==df[1][1]:
            for i in df[:2]:
                if '(64-bit)' not in i[0]:
                    if ecmd(i[-1].replace('MsiExec.exe /I', 'MsiExec.exe /X')+' /qn')==0:
                        print i[0], '.'.join([str(k) for k in i[1]])
        else:
            if ecmd(df[1][-1].replace('MsiExec.exe /I', 'MsiExec.exe /X')+' /qn')==0:
                print df[1][0], '.'.join([str(k) for k in df[1][1]])

if len(vf)>1:
        print '\n'
        print 'Removed JREs: '
        if len(vf[2:])>0:
            for i in vf[2:]:
                if ecmd(i[-1].replace('MsiExec.exe /I', 'MsiExec.exe /X')+' /qn')==0:
                    print i[0], '.'.join([str(k) for k in i[1]])
        if vf[0][1]==vf[1][1]:
            for i in vf[:2]:
                if '(64-bit)' not in i[0]:
                    if ecmd(i[-1].replace('MsiExec.exe /I', 'MsiExec.exe /X')+' /qn')==0:
                        print i[0], '.'.join([str(k) for k in i[1]])
        else:
            if ecmd(vf[1][-1].replace('MsiExec.exe /I', 'MsiExec.exe /X')+' /qn')==0:
                print vf[1][0], '.'.join([str(k) for k in vf[1][1]])
else:
    print 'No Java Installed'

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Uninstall Old Javas (JREs and JDKs)

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