The purpose of the study is to assess what drug does to body when healthy Chinese participants receive single oral dose of JNJ-77242113.

Inclusion Criteria:

• Healthy on the basis of physical examination, medical history, vital signs, and 12-lead electrocardiogram (ECG) performed at screening. If there are any abnormalities, they must be consistent with the underlying illness in the study population or considered not clinically relevant and this determination must be recorded in the participant's source documents and initialed by the investigator
• Body mass index (BMI; weight kilograms [kg] per height [meter^2]) between 18.0 and 27.9 kilograms per meter^2 (kg/m2) (inclusive), and body weight not less than 50.0 kg at screening
• A woman of childbearing potential must have a negative highly sensitive serum (beta-human chorionic gonadotropin [beta-hCG]) at screening and on Day -1
• Blood pressure (after the participant is supine for 5 minutes) between 90 (inclusive) and 140 millimeters of mercury (mmHg) (exclusive) systolic, and no higher than 90 mm Hg diastolic
• Must be a nonsmoker or habitually smokes no more than 5 cigarettes or equivalent of e-cigarettes, or 2 cigars, or 2 pipes of tobacco per day for at least 6 months before study drug administration

Exclusion Criteria:

• History of surgical resection of the stomach, small or large intestine (excluding appendectomy, cholecystectomy, or resection of benign polyps)
• History of use of medications such as nonsteroidal anti-inflammatory drugs (NSAIDS) or aspirin within 28 days prior to screening or planned use during the study
• Clinically significant infection within 30 days prior to screening or any serious infection within 6 months prior to screening requiring intravenous antimicrobial therapy
• Known allergies, hypersensitivity, or intolerance to JNJ-77242113 or its excipients
• History of severe allergic or anaphylactic reactions

The data sharing policy of the Janssen Pharmaceutical Companies of Johnson & Johnson is available at www.janssen.com/clinical-trials/transparency. As noted on this site, requests for access to the study data can be submitted through Yale Open Data Access (YODA) Project site at yoda.yale.edu