x in y is defined in an inaccessible class or interface, ID in structure

I am getting `main.java: error: someId in someStruct is defined in an inaccessible class or interface` but how can I solve this? my main class: ``` import subdir.Subclass; public class main{ ... Subclass.someArrayList.get(i).someString ... } ``` my subdir.Subclass class: ``` package subdir; public class Subclass{ public static java.util.ArrayList<someStruct> someArrayList = new java.util.ArrayList<someStruct>(java.util.Arrays.asList( new someStruct(3, "string", "string"), new someStruct(4, "string", "string") )); } class someStruct { public int someId; public String someString; public String someString2; public someStruct(int someId, String someString, String someString2) { this.someId = someId; this.someString = someString; this.someString2 = someString2; } } ```