如何在for循环中找到最小数量？

Question

I want to find min number in rolePriority. How can i get min number in the for loop.

UserRole.java

public class UserRole implements Serializable{
    private Integer id;
    private User user;
    private Role role;

RoleAction.java

 public class RoleAction implements Serializable{ private Integer id; private Role role; private Action action; } 

for (UserRole userRole : userRoles) {
            dbRoles.add(userRole.getRole().getRoleName());

            int rolePriority=userRole.getRole().getPriority();



            for (RoleAction ra: userRole.getRole().getRoleActions()) {

                System.out.println("#########"+ra.getAction().getName());
                System.out.println("@@@@@@@@@"+ra.getAction().getId());

                map.put(ra.getAction().getName(), ra.getAction().getId());

            }

        }

Answer 1

If you want to find the minimum role priority among any user role, then you can try the following:

int minPriority = -1;
for (UserRole userRole : userRoles) {
    dbRoles.add(userRole.getRole().getRoleName());

    int rolePriority = userRole.getRole().getPriority();
    if (rolePriority < minPriority || minPriority == -1) {
        minPriority = rolePriority;
    }
    for (RoleAction ra: userRole.getRole().getRoleActions()) {
        System.out.println("#########"+ra.getAction().getName());
        System.out.println("@@@@@@@@@"+ra.getAction().getId());
        map.put(ra.getAction().getName(), ra.getAction().getId());
    }
}

Explanation:

The variable minPriority is initialized to -1 as a placeholder value. During each iteration of the loop, the current priority ( rolePriority ) is compared against the smallest value seen so far ( minPriority ), and this minimum value is possibly updated. Also, during the first iteration of the loop, minPriority is assigned to the rolePrioirity . If your priorities can take the value -1 then you should initialize minPriority to some value which is never actually used.