Study to Investigate Effects of Repeated Administration of Itraconazole on Pharmacokinetics of JNJ-42847922 in Healthy Male Participants

Inclusion Criteria: * Healthy male participants aged between 18 and 55 years, inclusive * Body mass index (BMI) between 18 and 30 kilogram/meter\^2 inclusive (BMI = weight/height\^2) * Nonsmoker (not smoked for at least 3 months prior to screening) * Men who are sexually active with a woman of childbearing potential and have not had a vasectomy must agree to use a barrier method of birth control e.g., either condom with spermicidal foam/gel/film/cream/suppository or partner with occlusive cap (diaphragm or cervical/vault caps) with spermicidal foam/gel/film/cream/suppository, and all men must also not donate sperm during the study and for 3 months after receiving the last dose of study drug. In addition, their female partners should also use an appropriate method of birth control for at least the same duration * Participants must have signed an informed consent document indicating that they understand the purpose of and procedures required for the study and are willing to participate in the study and comply with the study procedures and restrictions Exclusion Criteria: * Clinically significant abnormal values for hematology, clinical chemistry or urinalysis at screening or admission * Clinically significant abnormal physical examination, vital signs or 12-lead ECG at screening, on Day -1 or on Day 1, predose * History of or current significant psychiatric and other illness including (but not limited to) cardiac arrhythmias or other cardiac disease, hematological disease, lipid abnormalities, bronchospastic respiratory disease, diabetes mellitus, renal or hepatic insufficiency, thyroid disease, Parkinson's disease, infection, or any other illness that the Investigator considers should exclude the subject. History of epilepsy or fits or unexplained black-outs * Serology positive for hepatitis B surface antigen (HBsAg), hepatitis C antibodies (HCV) or human immunodeficiency virus (HIV) antibodies * History of clinically significant drug and/or food allergies