/in/Main.java:11: error: non-static variable this cannot be referenced from a static context
        int studentCount = this.readInt();
                           ^
/in/Main.java:12: error: non-static variable students cannot be referenced from a static context
        students = new String[studentCount][6];
        ^
/in/Main.java:14: error: non-static variable this cannot be referenced from a static context
            dataStr = this.readLine();
                      ^
/in/Main.java:16: error: non-static variable students cannot be referenced from a static context
            System.arraycopy(dataArr, 0, students[i], 0, dataArr.length);
                                         ^
4 errors