how do i seperate the last name and first name so it can print out as first name last name

Java

++++++++ Welcome to Grading System Program! Please enter your name (Lastname, Firstname seperated by comma): Quan, Zixi Please enter your ID without any spaces (7 digits): 123 Please enter your ID without any spaces (7 digits): 1234567 Please enter your score (0-100): -90 Please enter your score (0-100): 99.5 Zixi Quan got 99.5. Based on the grading system, Zixi (1234567) will probably get Al Congratulations! Exit the program? (enter Yes to exit): Ne Please enter your name (Lastname, Firstname seperated by comma): Roberts, Lydia Please enter your ID without any spaces (7 digits): 9000001 Please enter your score (0-100): 0.5 Lydia Roberts got 9.5. Based on the grading system. Lydia (991 will cohablv at ENSL planseerkhacderato che