ErSKS commented 7 years ago

Develop a java program to display Batch, Department & Roll Number of user input. User input should be 6-character string such as 710339, 650101, etc.

Example:

User Input: 71AB39 - Not a valid CRN User Input: 7103396 - Not a valid CRN User Input: Nepal - Not a valid CRN User Input: 710339 - Valid CRN

Decoded Output

Batch: 2071 Department: Computer Engineering Roll No.: 39

milan604 commented 7 years ago

Program package decodecrn;

import java.util.Scanner; import java.util.regex.Pattern;

/*

@author m-lan */ public class DecodeCrn {

/**
- @param args the command line arguments */ public static void main(String[] args) { String crn, dpt, dpt_name; Scanner input = new Scanner(System.in); System.out.println("Please Enter Your College Roll Number of 6 Digits(Sample:710315):"); crn = input.next(); if (Pattern.matches("[a-zA-Z]+", crn) == true || crn.length() > 6) { System.out.println("Invalid College Roll Number"); } else { dpt = crn.substring(2, 4); if (dpt.equals("01")) { dpt_name = "Civil Engineering"; } else if (dpt.equals("02")) { dpt_name = "Architecture"; } else if (dpt.equals("03")) { dpt_name = "Computer Engineering"; } else if (dpt.equals("04")) { dpt_name = "Electronics Engineering"; } else { dpt_name = "Unknown"; } System.out.println("Batch:20" + crn.substring(0, 2)); System.out.println("Department:" + dpt_name); System.out.println("Rollno.:" + crn.substring(4, 6)); } } } Output

screenshot from 2017-08-10 15-29-54

ErSKS commented 7 years ago

@milan604 Display useful error message of the input ABCDEF : It's not a CRN.

jagdish4249 commented 7 years ago

package stringinput;

import static java.lang.Integer.parseInt; import javax.swing.JOptionPane;

/*

@author Jagdish Duwal */ public class StringInput {

/**
- @param args the command line arguments */ public static void main(String[] args) { int invalid=0; String roll; roll = JOptionPane.showInputDialog("Enter your full roll no(eg.710310)\n");
  
  System.out.println(); for(int i = 0 ; i< roll.length(); i++){ char c = roll.charAt(i); int ascii = (int)c; //ascii value of 0 = 48 and 9 = 57 boolean len = roll.length()==6; boolean number = ascii< 48 || ascii> 57; if(!len || number ) { invalid++; } }
  
  if(invalid == 0){ String batch; batch = roll.substring(0,2); System.out.printf("Batch: 20%s\n",batch);
```
String department;
department = roll.substring(2,4);
switch(parseInt(department)){
    case 01:
        department = "Civil Department";
        break;

    case 02:
        department = "Architechture Department";
        break;

    case 03:
        department = "Computer Department";
        break;

    case 04:
        department = "Electronics Department";
        break;

    default:
        department = "invalid input";

}
System.out.printf("Department: %s\n",department);

String rollno;
rollno = roll.substring(4);

System.out.printf("Roll no: %s\n",rollno);
```
  }else{ JOptionPane.showMessageDialog(null,"Please Enter your CRN"); }
}

} capture

capture

rivab commented 7 years ago

package day8tasklast;

import javax.swing.JOptionPane;

/*

@author DELL */ public class Day8tasklast {

/**

@param args the command line arguments */ public static void main(String[] args) { // TODO code application logic here String crn; String department = "00"; int roll, depart, batch; while (true) { crn = JOptionPane.showInputDialog("Enter your Roll no.");

for (char c : crn.toCharArray()) {
    if (!Character.isDigit(c)) {
        JOptionPane.showMessageDialog(null, "Roll no should be in number", "Try again", 1);
        crn = JOptionPane.showInputDialog("Enter your Roll no.");
        break;
    }
}

if (crn.length() != 6) {
    JOptionPane.showMessageDialog(null, "Number should be of 6 digits", "Try again", 1);
    continue;
}

batch = Integer.parseInt(crn.substring(0, 2));
if (batch > 74) {
    JOptionPane.showMessageDialog(null, "Batch is grater than current year", "Invalid", 1);
    continue;
}

depart = Integer.parseInt(crn.substring(2, 4));
if (depart == 1) {
    department = "Civil";
} else if (depart == 2) {
    department = "Architecture";
} else if (depart == 3) {
    department = "Computer";
} else if (depart == 4) {
    department = "Architecture";
} else {
    JOptionPane.showMessageDialog(null, "Unknown department", "Invalid", 1);
    continue;
}

roll = Integer.parseInt(crn.substring(4, 6));
if (roll >= 50 || roll < 1) {
    JOptionPane.showMessageDialog(null, "Roll grater than 50 is not accepted", "Invalid", 1);
    continue;
}

JOptionPane.showMessageDialog(null, "Batch=20" + batch + "\nDepartment=" + department + "\nRoll No.=" + roll, "Your info", 1);
break;

} } day8last1 day8last2 day8last3 day8last4

karmi214 commented 7 years ago

/*

To change this license header, choose License Headers in Project Properties.
To change this template file, choose Tools | Templates
and open the template in the editor. */ package day8task;

import static java.lang.Integer.parseInt; import javax.swing.JOptionPane;

/*

@author Anish */ public class Day8Task {

/**
- @param args the command line arguments */ public static void main(String[] args) { // TODO code application logic here String crn, b = "", d = "", r = ""; boolean f; do { f = true; crn = JOptionPane.showInputDialog("Enter your college roll number"); if (crn.length() != 6) { JOptionPane.showMessageDialog(null, "The entered data is not valid", "Error", 0); f = false; } else { for (int i = 0; i < crn.length(); i++) { char c = crn.charAt(i); if (!Character.isDigit(c)) { JOptionPane.showMessageDialog(null, "The entered data is not a number", "Error", 0); f = false; break; } } } if (f) { b = crn.substring(0, 2); d = crn.substring(2, 4); r = crn.substring(4); switch (d) { case "01": d = "Architecture"; break; case "02": d = "Civil"; break; case "03": d = "Computer"; break; case "04": d = "Electronics & Communication"; break; default: JOptionPane.showMessageDialog(null, "Incorrect department id", "Error", 0); f = false; break;
```
    }
}
```
  } while (!f); JOptionPane.showMessageDialog(null, "Batch of: 20" + b + "\nDepartment: " + d + "\nRoll: " + r);
}

}

Sudan15423 commented 7 years ago

/*

To change this license header, choose License Headers in Project Properties.
To change this template file, choose Tools | Templates
and open the template in the editor. */ package decode;

import java.util.Scanner; import javax.swing.JOptionPane;

/*

@author Dragon15423 */ public class Decode {

/**
- @param args the command line arguments */ public static void main(String[] args) { // TODO code application logic here
  
  String roll = JOptionPane.showInputDialog("Enter your full roll no(eg.710310)\n"); System.out.println("Your input =" + roll);
  
  if (roll.matches("[0-9]+") && roll.length() == 6) { System.out.println("Decoded Ouput"); System.out.println("Batch: 20" + roll.substring(0, 2)); System.out.print("Department: "); String com = roll.substring(2, 4);
```
switch (com) {

    case "01":
        System.out.println("Civil Engineering");
        break;

    case "02":
        System.out.println("Architecture Engineering");
        break;

    case "03":
        System.out.println("Computer Engineering");
        break;

    case "04":
        System.out.println("Electronics Engineering");
        break;

    default:
        System.out.println("not valid");
        break;
}
System.out.println("Roll no.: " + roll.substring(4, 6));
```
  } else { JOptionPane.showMessageDialog(null, "Not a valid CRN", "Error", 0); }
}

} input output invalidinput invalid

sajanbasnet75 commented 7 years ago

/*

To change this license header, choose License Headers in Project Properties.
To change this template file, choose Tools | Templates
and open the template in the editor. */ package decodecrn;

import javax.swing.JOptionPane;

/*

@author LORDsajan */ public class DecodeCrn {

/**

@param args the command line arguments */ public static void main(String[] args) { String test2; OUTER: do { String s8; String dep; s8 = JOptionPane.showInputDialog("Enter College RollNo");

if (s8.length() == 6 && s8.matches("[0-9]+")) {
    String s9 = s8.substring(0, 2);
    String s10 = s8.substring(3, 4);
    String s11 = s8.substring(4, 6);
    switch (s10) {
        case "1":
            dep = "Civil Engineering";
            break;
        case "2":
            dep = "Architect";
            break;
        case "3":
            dep = "Computer Engineering";
            break;
        case "4":
            dep = "Electronics Engineering";
            break;
        default:
            System.out.println("invalid rollno");
            break OUTER;
    }
    System.out.println("DECODED OUTPUT");
    System.out.println("Batch: 20" + s9);
    System.out.println("Department: " + dep);
    System.out.println("RollNo: " + s11);
    test2 = "true";
} else {
    JOptionPane.showMessageDialog(null, "Invalid Input", "Oops", 2);
    test2 = "false";
}

} while (test2.equals("false"));

}

111 112 in1 in2

ghost commented 7 years ago

package day08lastone;

import javax.swing.JOptionPane;

/*

@author Samikshya */ public class Day08Lastone {

/**

@param args the command line arguments */ public static void main(String[] args) { // TODO code application logic here String crn; String department = "00"; int roll, depart, batch; while (true) { crn = JOptionPane.showInputDialog("Enter your Roll no.");

for (char c : crn.toCharArray()) {
    if (!Character.isDigit(c)) {
        JOptionPane.showMessageDialog(null, "Roll no should be in number", "Try again", 1);
        crn = JOptionPane.showInputDialog("Enter your Roll no.");
        break;
    }
}

if (crn.length() != 6) {
    JOptionPane.showMessageDialog(null, "Number should be of 6 digits", "Try again", 1);
    continue;
}

batch = Integer.parseInt(crn.substring(0, 2));
if (batch > 74) {
    JOptionPane.showMessageDialog(null, "Batch is grater than current year", "Invalid", 1);
    continue;
}

depart = Integer.parseInt(crn.substring(2, 4));
if (depart == 1) {
    department = "Civil";
} else if (depart == 2) {
    department = "Architecture";
} else if (depart == 3) {
    department = "Computer";
} else if (depart == 4) {
    department = "Architecture";
} else {
    JOptionPane.showMessageDialog(null, "Unknown department", "Invalid", 1);
    continue;
}

roll = Integer.parseInt(crn.substring(4, 6));
if (roll >= 50 || roll < 1) {
    JOptionPane.showMessageDialog(null, "Roll grater than 50 is not accepted", "Invalid", 1);
    continue;
}

JOptionPane.showMessageDialog(null, "Batch=20" + batch + "\nDepartment=" + department + "\nRoll No.=" + roll, "Your info", 1);
break;

} capture capturee

syslin commented 7 years ago

/*

To change this license header, choose License Headers in Project Properties.
To change this template file, choose Tools | Templates
and open the template in the editor. */ package toidentifyuser;

import java.util.Scanner;

/*

@author dell */ public class ToIdentifyUser {

/**

@param args the command line arguments */ public static void main(String[] args) { // TODO code application logic here String roll, batch, dept, dept_nm; int b; Scanner crn = new Scanner(System.in); System.out.println("enter the roll number: eg. 710340"); roll = crn.next(); while (true) { for (char c : roll.toCharArray()) { if (!Character.isDigit(c)) { System.out.println("input must be a number of 6 digits"); roll = crn.next(); break; } } if (roll.length() != 6) { System.out.println("enter the number of 6 digits"); roll = crn.next(); continue; }

batch = roll.substring(0, 2);
if (Integer.parseInt(batch) > 74) {
    System.out.println("year greater than present year");
    break;
}

dept = roll.substring(3, 4);
switch (dept) {
    case "1":
        dept_nm = "Civil department";
        break;
    case "2":
        dept_nm = "ArchitectureDepartment";
        break;
    case "3":
        dept_nm = "Computer Department";
        break;
    case "4":
        dept_nm = "Electronics Department";
        break;
    default:
        dept_nm = "Not in the list";
        break;
}
String r = roll.substring(4, 6);
if (Integer.parseInt(r) >= 50 || Integer.parseInt(r) < 1) {
    System.out.println("invalid roll");
    break;
}
System.out.println("Batch:20" + batch);
System.out.println("department:" + dept_nm);
System.out.println("your roll number is:" + r);
break;

} } } captur5 capture6

kajalmaharjan commented 7 years ago

/*

To change this license header, choose License Headers in Project Properties.
To change this template file, choose Tools | Templates
and open the template in the editor. */ package day8task9;

import javax.swing.JOptionPane;

/*

@author kajal */ public class Day8Task9 {

/**
- @param args the command line arguments */ public static void main(String[] args) { // TODO code application logic here String crn, department = "00"; int batch, roll, depart;
  
  crn = JOptionPane.showInputDialog("Enter your roll number:"); if (crn.length() != 6) { JOptionPane.showInputDialog("Enter your correct roll number:"); }
  
  for (char c : crn.toCharArray()) { if (!Character.isDigit(c)) { crn = JOptionPane.showInputDialog("Enter your correct Roll no."); continue; } }
  
  batch = Integer.parseInt(crn.substring(0, 2)); if (batch > 74) { JOptionPane.showInputDialog("Enter the correct roll no:"); }
  
  depart = Integer.parseInt(crn.substring(2, 4)); if (depart == 1) { department = "Civil"; } else if (depart == 2) { department = "Architecture"; } else if (depart == 3) { department = "Computer"; } else if (depart == 4) { department = "Architecture"; } else { JOptionPane.showMessageDialog(null, "Unknown department", "Invalid", 1);
  
  }
  
  roll = Integer.parseInt(crn.substring(4, 6)); if (roll >= 50 || roll < 1) { JOptionPane.showMessageDialog(null, "Roll grater than 50 is not accepted", "Invalid", 1);
  
  } JOptionPane.showMessageDialog(null, "Batch = 20" + batch + "\nDepartment=" + department + "\nRoll No.= " + roll, "crn", 1); } }

maheshyakami commented 7 years ago

/*

To change this license header, choose License Headers in Project Properties.
To change this template file, choose Tools | Templates
and open the template in the editor. */ package decodecrn;

import javax.swing.JOptionPane;

/*

@author mahesh */ public class DecodeCRN {

/**
- @param args the command line arguments */ public static void main(String[] args) { // TODO code application logic here String CRN = new String(); CRN = JOptionPane.showInputDialog("Enter CRN"); System.out.println(CRN); if (!CRN.matches("[0-9]+") || CRN.length() > 6) { JOptionPane.showMessageDialog(null, "Invalid number"); } else { String dept; dept = CRN.substring(2, 4); switch (dept) { case "01": dept = "Civil"; break; case "02": dept = "Architecture"; break; case "03": dept = "Computer"; break; case "04": dept = "Electronics and Communication"; break; default: dept = "Unspecified Department"; break; } JOptionPane.showMessageDialog(null, "Batch: " + CRN.substring(0, 2) + "\nDepartment: " + dept + "\nRoll No: " + CRN.substring(4)); }
}

}

rabina12 commented 7 years ago

package day8a2;

import javax.swing.JOptionPane;

/*

@author Awal */ public class Day8a2 {

/**
- @param args the command line arguments */ public static void main(String[] args) { // TODO code application logic here String crn = JOptionPane.showInputDialog("Enter your full roll no(eg.710101)\n"); System.out.println("Your input =" + crn);
  
  if (crn.matches("[0-9]+") && crn.length() == 6) { System.out.println("Decoded Ouput"); System.out.println("Batch: 20" + crn.substring(0, 2)); System.out.print("Department: "); String s = crn.substring(2, 4);
```
switch (s) {

    case "01":
        System.out.println("Architecture Engineering");
        break;

    case "02":
        System.out.println("Civil Engineering");
        break;

    case "03":
        System.out.println("Computer Engineering");
        break;

    case "04":
        System.out.println("Electronics Engineering");
        break;

    default:
        System.out.println("not valid");
        break;
}
System.out.println("Roll no.: " + crn.substring(4, 6));
```
  } else { JOptionPane.showMessageDialog(null,"Roll no should be in numbers"); }
}

} capture1 capture1a capture1c

RakenShahi commented 7 years ago

/*

To change this license header, choose License Headers in Project Properties.
To change this template file, choose Tools | Templates
and open the template in the editor. */ package decode;

import java.util.Scanner; import javax.swing.JOptionPane;

/*

@author DELL */ public class Decode {

/**
- @param args the command line arguments */ public static void main(String[] args) { // TODO code application logic here String r; Scanner st = new Scanner(System.in); System.out.println("Enter your college roll no(eg.710327) : "); r = st.next(); if (r.matches("[0-9]+") && r.length() == 6) { System.out.println("\nDecoded Ouput"); System.out.println("Batch:20" + r.substring(0, 2)); System.out.print("Department:"); String check = r.substring(2, 4); switch (check) { case "01": System.out.println("Civil Engineering"); break; case "02": System.out.println("Architecture Engineering"); break; case "03": System.out.println("Computer Engineering"); break; case "04": System.out.println("Electronics Engineering"); break; default: System.out.println("not valid"); break; } System.out.println("Roll no.:" + r.substring(4, 6)); } else { System.out.println("Invalid roll number");; } } }

OUTPUT decode1 decode2

ajay987 commented 7 years ago

public static void main(String[] args) { // TODO code application logic here String str; int cg, ch, rn;

    str = JOptionPane.show

op1 op2 op3 op2 op5 op6

String str; int cg, ch, rn;

    str = JOptionPane.showInputDialog("Enter your id number");
    if (str.length() == 6) {
        cg = Integer.parseInt(str.substring(0, 2));
        System.out.println("Batch:20" + cg);
        ch = Integer.parseInt(str.substring(2, 4));
        if (ch == 01) {
            System.out.println("Department:Civil Engineering");
        } else if (ch == 02) {
            System.out.println("Department:Architecture");
        } else if (ch == 03) {
            System.out.println("Department:Computer Engineering");
        } else if (ch == 04) {
            System.out.println("Department:Electronics Engineering");
        }
        rn = Integer.parseInt(str.substring(4, 6));
        System.out.println("Roll No:" + rn);
        String sp = "true";
    } else {
        JOptionPane.showMessageDialog(null, "not valid");

    }

}

ErSKS commented 7 years ago

I saw your coding diversity. Try to understand and write as clean & atomic as you can. Still I found error on your code, check your solution again.

@milan604 7103ab ab is not a roll number @jagdish4249 Ok @rivab 7103ab - java.lang.NumberFormatException @karmi214 Ok Susan Ok @sajanbasnet75 Ok @kajalmaharjan After 1st mistake attempt, your code doesn't function well

Note:- Try to find out bug of your friend's code too.

ErSKS / Java

Decode CRN #31

Example:

Decoded Output