OpenJDK should contain the same root certificates as commonly available on Linux distros, e.g. on Ubuntu in /etc/ssl/certs/java/cacerts

 $ keytool -v -list -keystore /etc/ssl/certs/java/cacerts -storepass changeit | perl -ne 'print if /^Alias.*globalsign.*r[24]/ ... /^\*/'
Alias name: debian:globalsign_root_ca_-_r2.pem
Creation date: Apr 19, 2015
Entry type: trustedCertEntry

Owner: CN=GlobalSign, O=GlobalSign, OU=GlobalSign Root CA - R2
Issuer: CN=GlobalSign, O=GlobalSign, OU=GlobalSign Root CA - R2
Serial number: 400000000010f8626e60d
Valid from: Fri Dec 15 00:00:00 PST 2006 until: Wed Dec 15 00:00:00 PST 2021
Certificate fingerprints:
MD5: 94:14:77:7E:3E:5E:FD:8F:30:BD:41:B0:CF:E7:D0:30
SHA1: 75:E0:AB:B6:13:85:12:27:1C:04:F8:5F:DD:DE:38:E4:B7:24:2E:FE
SHA256: CA:42:DD:41:74:5F:D0:B8:1E:B9:02:36:2C:F9:D8:BF:71:9D:A1:BD:1B:1E:FC:94:6F:5B:4C:99:F4:2C:1B:9E
Signature algorithm name: SHA1withRSA
Version: 3

Extensions:

#1: ObjectId: 2.5.29.35 Criticality=false
AuthorityKeyIdentifier [
KeyIdentifier [
0000: 9B E2 07 57 67 1C 1E C0 6A 06 DE 59 B4 9A 2D DF ...Wg...j..Y..-.
0010: DC 19 86 2E ....
]
]

#2: ObjectId: 2.5.29.19 Criticality=true
BasicConstraints:[
  CA:true
  PathLen:2147483647
]

#3: ObjectId: 2.5.29.31 Criticality=false
CRLDistributionPoints [
  [DistributionPoint:
     [URIName: http://crl.globalsign.net/root-r2.crl]
]]

#4: ObjectId: 2.5.29.15 Criticality=true
KeyUsage [
  Key_CertSign
  Crl_Sign
]

#5: ObjectId: 2.5.29.14 Criticality=false
SubjectKeyIdentifier [
KeyIdentifier [
0000: 9B E2 07 57 67 1C 1E C0 6A 06 DE 59 B4 9A 2D DF ...Wg...j..Y..-.
0010: DC 19 86 2E ....
]
]



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Alias name: debian:globalsign_ecc_root_ca_-_r4.pem
Creation date: Feb 24, 2016
Entry type: trustedCertEntry

Owner: CN=GlobalSign, O=GlobalSign, OU=GlobalSign ECC Root CA - R4
Issuer: CN=GlobalSign, O=GlobalSign, OU=GlobalSign ECC Root CA - R4
Serial number: 2a38a41c960a04de42b228a50be8349802
Valid from: Mon Nov 12 16:00:00 PST 2012 until: Mon Jan 18 19:14:07 PST 2038
Certificate fingerprints:
MD5: 20:F0:27:68:D1:7E:A0:9D:0E:E6:2A:CA:DF:5C:89:8E
SHA1: 69:69:56:2E:40:80:F4:24:A1:E7:19:9F:14:BA:F3:EE:58:AB:6A:BB
SHA256: BE:C9:49:11:C2:95:56:76:DB:6C:0A:55:09:86:D7:6E:3B:A0:05:66:7C:44:2C:97:62:B4:FB:B7:73:DE:22:8C
Signature algorithm name: SHA256withECDSA
Version: 3

Extensions:

#1: ObjectId: 2.5.29.19 Criticality=true
BasicConstraints:[
  CA:true
  PathLen:2147483647
]

#2: ObjectId: 2.5.29.15 Criticality=true
KeyUsage [
  Key_CertSign
  Crl_Sign
]

#3: ObjectId: 2.5.29.14 Criticality=false
SubjectKeyIdentifier [
KeyIdentifier [
0000: 54 B0 7B AD 45 B8 E2 40 7F FB 0A 6E FB BE 33 C9 T...E..@...n..3.
0010: 3C A3 84 D5 <...
]
]



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