import java.io.*;public class Student extends Personal {    public int size() {        return super.size() + majorLen*2;    }    protected String major;    protected final int majorLen = 10;    Student() {        super();    }    Student(String ssn, String n, String c, int y, long s, String m) {        super(ssn,n,c,y,s);        major = m;    }    public void writeToFile(RandomAccessFile out) throws IOException {        super.writeToFile(out);        writeString(major,out);    }    public void readFromFile(RandomAccessFile in) throws IOException {        super.readFromFile(in);        major = readString(majorLen,in);    }    public void readFromConsole() throws IOException {        super.readFromConsole();        System.out.print("Enter major: ");        major = readLine();        for (int i = major.length(); i < nameLen; i++)            major += ' ';     }    public void writeLegibly() {        super.writeLegibly();        System.out.print(", major = " + major.trim());    }    public void copy(DbObject[] d) {        d[0] = new Student(SSN,name,city,year,salary,major);    }}