public class SystemUtil{ public static boolean isAdmin(String userId){ return userId.toLowerCase()=="admin"; } public static void main(String[] args){ System.out.println(isAdmin("Admin")); } }
public static boolean isAdmin(String userId){
return userId.toLowerCase()=="admin";
}
public static void main(String[] args){
System.out.println(isAdmin("Admin"));
true
false
1
编译错误
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