CIS 260 TestSeq2.java

Code

import java.io.*;
import java.util.*;

class Record {
    private int id;
    private String name;
        
    public Record(int id, String name) { setID(id); setName(name); }
    public void setID(int id) { this.id= id; }
    public void setName(String name) {
        if (name == null) this.name = "";
        else this.name = name;
    }
    public int getID() { return id; }
    public String getName() { return name; }
    public String toString() { return String.format("%04d-> %s", id, name); }
}

public class TestSeq2 {
    public static void main(String[] args) {
        Scanner in = null;
        int readCount = 0;
        int writeCount = 0;
        System.out.printf("Records found in file:\n");
        try {
            in = new Scanner(new File("records.txt"));
            while (in.hasNext()) {
                String linein = in.nextLine();
                readCount++;
                String[] fields = linein.split(":");
                if (fields.length != 2) {
                    System.err.println("Error: Invalid record in file");
                    System.err.println(" * * * " + linein);
                } else {
                    try {
                        int id = Integer.parseInt(fields[0]);
                        System.out.println(new Record(id, fields[1]));
                        writeCount++;
                    } catch (NumberFormatException e2) {
                        System.out.println("Error: Invalid ID number found in file");
                    }
                }
            }
        } catch (Exception e1) {
            System.err.println(e1.getMessage());
        }
        if (in != null) in.close();
        System.out.println("\nRecords read: " + readCount);
        System.out.println("Records written: " + writeCount);
    }
}