毛错
public class User implements Comparable<User> { private String username; public User(String a){
username = a;
}
@Override
public int compareTo(User o) {
return username.compareTo(o.getUsername()); } public String getUsername() {
return username;
}
}
public class UserTest {
public static void main(String[] args)
{
User a = new User("Zhang fei");
User b = new User("Liu Bei");
int c = a.compareTo(b);
}
}
public class User implements Comparable<User> { private String username; public User(String a){
username = a;
}
@Override
public int compareTo(User o) {
return username.compareTo(o.getUsername()); } public String getUsername() {
return username;
}
}
public class UserTest {
public static void main(String[] args)
{
User a = new User("Zhang fei");
User b = new User("Liu Bei");
int c = a.compareTo(b);
}
}
解决方案 »
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