The purpose of this study is to assess the absorption, metabolism, and excretion of JNJ-42756493 in healthy male adult participants after administration of a single oral dose of 12 milligram (mg) of unlabeled JNJ-42756493 admixed with 14C JNJ-42756493.

This is a single--center, open--label (The researchers and participants know the treatment the participant is receiving) study. The study consists of 3 parts: Screening (35 days ), Open-label Treatment Phase (Day 1 up to Day 14 or 28); and Follow-up (up to 30 days). Total duration of the study is approximately 79 to 93 days. Plasma and urine will be collected for determination of JNJ-42756493 concentrations. Participants will be primarily evaluated for absorption, the metabolic pathways and the excretion of JNJ-42756493. Participants' safety will be monitored throughout the study.

Inclusion Criteria:

• Willing to adhere to the prohibitions and restrictions specified in the protocol
• A man who is sexually active must agree to use a condom; and a man who is sexually active with a woman of childbearing potential and has not had a vasectomy, must agree to use a condom in combination with an adequate contraception method as deemed appropriate by the investigator (example, double-barrier method, partner using effective contraception [defined as hormonal contraception (pill, patch, injection), intrauterine device, surgical sterilization] and to not donate sperm for 5 months after receiving the study drug
• Body mass index (BMI; weight [kg]/height2 [m]2) between 18 and 30 kilogram per square meter (kg/m2) (inclusive), and body weight not less than 50 kg

Exclusion Criteria:

• History of or current clinically significant medical illness including (but not limited to) cardiac arrhythmias or other cardiac disease, hematologic disease, coagulation disorders (including any abnormal bleeding or blood dyscrasias), lipid abnormalities, significant pulmonary disease, including bronchospastic respiratory disease, diabetes mellitus, hepatic or renal insufficiency [creatinine clearance below 90 milliliter per minute (mL/min)], thyroid disease, neurologic or psychiatric disease, infection, or any other illness that the investigator considers should exclude the participant or that could interfere with the interpretation of the study results
• History or current evidence of ophthalmic disorder, such as central serous retinopathy or retinal vein occlusion, active wet age related macular degeneration, diabetic retinopathy with macular edema, uncontrolled glaucoma, corneal pathology such as keratitis, keratoconjunctivitis, keratopathy, corneal abrasion, inflammation or ulceration
• Clinically significant abnormal physical examination, vital signs, or 12 lead electrocardiogram (ECG) and clinically significant abnormal values for hematology, clinical chemistry, or urinalysis at screening or at screening or at admission to the study center as deemed appropriate by the investigator
• Use of any prescription or nonprescription medication (including vitamins and herbal supplements), except for acetaminophen, within 14 days before dosing is scheduled until End-of-Study procedures
• History of drug or alcohol abuse according to Diagnostic and Statistical Manual of Mental Disorders (4th edition) (DSM-IV) criteria within 5 years before screening or positive test result(s) for alcohol and/or drugs of abuse (such as barbiturates, opiates, cocaine, cannabinoids, amphetamines, and benzodiazepines) at screening and Day -2 of the treatment period.