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Thread: I need a little help

  1. #1
    Junior Member
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    Angry I need a little help

    I need a little help, I have some depreciated code, and I have no idea how to change it to newer without rewriting the whole thing. any assistance is appreciated










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

    public class OneLetterOff {
    public static void main(String[] args) throws Exception {

    DataInputStream input = new DataInputStream(System.in);
    System.out.print("1.Encrypt a file\t2.Decrypt a file\n");
    System.out.print("Enter your coice: ");
    int n = Integer.parseInt(input.readLine());
    System.out.print("Enter file name with out extension: ");
    String file = input.readLine();
    switch (n) {
    case 1:
    encrypt(file);
    break;
    case 2:
    decrypt(file);
    break;
    default:
    System.out.println("Invalid choice");
    }
    }

    public static void encrypt(String file) throws Exception {
    BufferedReader br = new BufferedReader(new FileReader(file + ".txt"));
    PrintWriter ps = new PrintWriter(new FileOutputStream("Encrypt.txt"));
    String line;
    while ((line = br.readLine()) != null) {
    for (int i = 0; i < line.length(); i++) {
    Character c = line.charAt(i);
    char ch = line.charAt(i);
    if (c.isLetter(ch)) {
    if (ch == 'z')
    ch = 'a';
    else if (ch == 'Z')
    ch = 'A';
    else
    ch++;
    }
    ps.write("" + ch);
    }
    }
    br.close();
    ps.close();
    System.out
    .println("file encrypted successfully check the Encrypt.txt file");
    }

    public static void decrypt(String file) throws Exception {
    BufferedReader br = new BufferedReader(new FileReader(file + ".txt"));
    PrintWriter ps = new PrintWriter(new FileOutputStream("Decrypt.txt"));
    String line;
    while ((line = br.readLine()) != null) {
    for (int i = 0; i < line.length(); i++) {
    Character c = line.charAt(i);
    char ch = line.charAt(i);
    if (c.isLetter(ch)) {
    if (ch == 'a')
    ch = 'z';
    else if (ch == 'A')
    ch = 'Z';
    else
    ch--;
    }
    ps.write("" + ch);
    }
    }
    br.close();
    ps.close();
    System.out
    .println("file decrypted successfully check the Decrypt.txt file");
    }

    }

  2. #2
    Super Moderator pbrockway2's Avatar
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    Default Re: I need a little help

    I have some depreciated code
    So which lines involve methods (or classes) that are depreciated? And do the API docs mention any alternative?

  3. #3
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    Default Re: I need a little help

    Quote Originally Posted by MrHatchi87 View Post
    I need a little help, I have some depreciated code, and I have no idea how to change it to newer without rewriting the whole thing. any assistance is appreciated










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

    public class OneLetterOff {
    public static void main(String[] args) throws Exception {

    DataInputStream input = new DataInputStream(System.in);
    System.out.print("1.Encrypt a file\t2.Decrypt a file\n");
    System.out.print("Enter your coice: ");
    int n = Integer.parseInt(input.readLine());
    System.out.print("Enter file name with out extension: ");
    String file = input.readLine();
    switch (n) {
    case 1:
    encrypt(file);
    break;
    case 2:
    decrypt(file);
    break;
    default:
    System.out.println("Invalid choice");
    }
    }

    public static void encrypt(String file) throws Exception {
    BufferedReader br = new BufferedReader(new FileReader(file + ".txt"));
    PrintWriter ps = new PrintWriter(new FileOutputStream("Encrypt.txt"));
    String line;
    while ((line = br.readLine()) != null) {
    for (int i = 0; i < line.length(); i++) {
    Character c = line.charAt(i);
    char ch = line.charAt(i);
    if (c.isLetter(ch)) {
    if (ch == 'z')
    ch = 'a';
    else if (ch == 'Z')
    ch = 'A';
    else
    ch++;
    }
    ps.write("" + ch);
    }
    }
    br.close();
    ps.close();
    System.out
    .println("file encrypted successfully check the Encrypt.txt file");
    }

    public static void decrypt(String file) throws Exception {
    BufferedReader br = new BufferedReader(new FileReader(file + ".txt"));
    PrintWriter ps = new PrintWriter(new FileOutputStream("Decrypt.txt"));
    String line;
    while ((line = br.readLine()) != null) {
    for (int i = 0; i < line.length(); i++) {
    Character c = line.charAt(i);
    char ch = line.charAt(i);
    if (c.isLetter(ch)) {
    if (ch == 'a')
    ch = 'z';
    else if (ch == 'A')
    ch = 'Z';
    else
    ch--;
    }
    ps.write("" + ch);
    }
    }
    br.close();
    ps.close();
    System.out
    .println("file decrypted successfully check the Decrypt.txt file");
    }

    }
    the bold items are the items that appear as depreciated, I don't recall what it recommends. Sorry, I'm at work now and can't access my laptop