Java Program: Class Record Menu

[fritzell]

---

unsa man ni siya file handling or variables rah

[stealthghost]

@TS, abot na mo sa topic nga Abstract Method? or plain method lang ni?

try nako himo ron kadlawn.. just arrived home..

Spoiler! 

import java.util.*;


public class classrecord {
    
    private int studentSize, gradeSize;
    private List<Map<String, String>> myRecord = new ArrayList<Map<String, String>>();
    
    String myChoice = "";
    final Scanner scanIn = new Scanner(System.in);
    
    private void startHere(){
        myChoice = menu();
        if(myChoice.equalsIgnoreCase("1")){
            initClassSize();
        }
        if(myChoice.equalsIgnoreCase("2")){
            newStudents();
        }
        if(myChoice.equalsIgnoreCase("3")){
            System.out.println("Show Class");
            startHere();
        }
        if(myChoice.equalsIgnoreCase("4")){
            System.out.println("Delete Student");
            startHere();
        }
        if(myChoice.equalsIgnoreCase("5")){
            System.out.println("Edit Student");
            startHere();
        }
        if(myChoice.equalsIgnoreCase("0")){
            System.exit(0);
        }
    }


    private String menu(){
        System.out.println("[1] Initialize Record");
        System.out.println("[2] Enter Student Record");
        System.out.println("[3] Show Class Record");
        System.out.println("[4] Delete Student");
        System.out.println("[5] Edit Student");
        System.out.println("[0] Exit");
        return scanIn.nextLine();
    }
    
    private void initClassSize(){
        if(getStudentSize()<=0){
            try{
                System.out.println("Enter class size: ");
                setStudentSize(Integer.parseInt(scanIn.nextLine()));
                initNumberOfGrades();
            }catch(NumberFormatException nfe){
                System.out.println("Please enter INTEGER only!");
                initClassSize();
            }
        }else{
            System.out.println("Class record has been initialized");
        }
    }
    
    private void initNumberOfGrades(){
        if(getStudentSize()<=0){
            initClassSize();
        }
        if(getGradeSize()>0 || getStudentSize()<=0){
            System.out.println("Invalid Access");
        }
        if(getGradeSize()<=0 && getStudentSize()>0){
            try{
                System.out.println("Enter number of grades: ");
                setGradeSize(Integer.parseInt(scanIn.nextLine()));
            }catch(NumberFormatException nfe){
                System.out.println("Please enter INTEGER only!");
                initNumberOfGrades();
            }
            System.out.println("Class Size: "+getStudentSize());
            System.out.println("Number of Grades: "+getGradeSize());
            startHere();
        }
    }
    
    private void newStudents(){
        if(getStudentSize()<=0){
            System.out.println("Initialize Record first!");
            startHere();
        }
        if(myRecord.size()<getStudentSize() && getStudentSize()>0){
            Map<String, String> newStudent = new HashMap<String, String>();
            System.out.println("Enter ID:");
            String processInput = scanIn.nextLine();
            newStudent.put("ID", processInput);
            System.out.println("Enter name: ");
            processInput = scanIn.nextLine();
            newStudent.put("firstname",processInput);
            for(int x=0;x<getGradeSize();x++){
                System.out.println("Enter grade no. ["+x+"]: ");
                processInput = scanIn.nextLine();
                newStudent.put(String.valueOf(x),processInput);
            }
            myRecord.add(newStudent);
            for(int x=0;x<myRecord.size();x++){
                System.out.println(myRecord.get(x));
            }
            startHere();
        }else{
            System.out.println("Class Record is full!");
            startHere();
        }
    }
    
    public static void main(String[] args){
        classrecord cr = new classrecord();
        cr.startHere();
    }


    private int getGradeSize() {
        return gradeSize;
    }


    private void setGradeSize(int gradeSize) {
        this.gradeSize = gradeSize;
    }


    private int getStudentSize() {
        return studentSize;
    }


    private void setStudentSize(int studentSize) {
        this.studentSize = studentSize;
    }
}

Wala pa ni mahuman og bati pagka himo....

[AMD_earl]

@fritzell, dili ni siya file handling sir..VARIABLES ra..thanks

[AMD_earl]

@stealthghost
dili naka ma sendan og private message sir, puno na..ty

[jairoh_]

di rmn kaha ni GUI?

[SuperStar]

watch mode nalng ko ani kay lisud kaayo ni para nako huhuhu

[AMD_earl]

@jairoh_
yes sir, dili ra GUI..then variables lang gamition..once mo exit..mawala rapud data..thanks

[stealthghost]

Spoiler! 

import java.util.*;


public class classrecord {
    
    private int studentSize, gradeSize;
    private List<Map<String, String>> myRecord = new ArrayList<Map<String, String>>();
    
    String myChoice = "";
    final Scanner scanIn = new Scanner(System.in);
    
    private void startHere(){
        myChoice = menu();
        if(myChoice.equalsIgnoreCase("1")){
            initClassSize();
        }
        if(myChoice.equalsIgnoreCase("2")){
            newStudents();
        }
        if(myChoice.equalsIgnoreCase("3")){
            System.out.println("Show Class");
            startHere();
        }
        if(myChoice.equalsIgnoreCase("4")){
            System.out.println("Delete Student");
            startHere();
        }
        if(myChoice.equalsIgnoreCase("5")){
            System.out.println("Edit Student");
            startHere();
        }
        if(myChoice.equalsIgnoreCase("0")){
            System.exit(0);
        }
    }


    private String menu(){
        System.out.println("[1] Initialize Record");
        System.out.println("[2] Enter Student Record");
        System.out.println("[3] Show Class Record");
        System.out.println("[4] Delete Student");
        System.out.println("[5] Edit Student");
        System.out.println("[0] Exit");
        return scanIn.nextLine();
    }
    
    private void initClassSize(){
        if(getStudentSize()<=0){
            try{
                System.out.println("Enter class size: ");
                setStudentSize(Integer.parseInt(scanIn.nextLine()));
                initNumberOfGrades();
            }catch(NumberFormatException nfe){
                System.out.println("Please enter INTEGER only!");
                initClassSize();
            }
        }else{
            System.out.println("Class record has been initialized");
        }
    }
    
    private void initNumberOfGrades(){
        if(getStudentSize()<=0){
            initClassSize();
        }
        if(getGradeSize()>0 || getStudentSize()<=0){
            System.out.println("Invalid Access");
        }
        if(getGradeSize()<=0 && getStudentSize()>0){
            try{
                System.out.println("Enter number of grades: ");
                setGradeSize(Integer.parseInt(scanIn.nextLine()));
            }catch(NumberFormatException nfe){
                System.out.println("Please enter INTEGER only!");
                initNumberOfGrades();
            }
            System.out.println("Class Size: "+getStudentSize());
            System.out.println("Number of Grades: "+getGradeSize());
            startHere();
        }
    }
    
    private void newStudents(){
        if(getStudentSize()<=0){
            System.out.println("Initialize Record first!");
            startHere();
        }
        if(myRecord.size()<getStudentSize() && getStudentSize()>0){
            Map<String, String> newStudent = new HashMap<String, String>();
            System.out.println("Enter ID:");
            String processInput = scanIn.nextLine();
            newStudent.put("ID", processInput);
            System.out.println("Enter name: ");
            processInput = scanIn.nextLine();
            newStudent.put("firstname",processInput);
            for(int x=0;x<getGradeSize();x++){
                System.out.println("Enter grade no. ["+x+"]: ");
                processInput = scanIn.nextLine();
                newStudent.put(String.valueOf(x),processInput);
            }
            myRecord.add(newStudent);
            for(int x=0;x<myRecord.size();x++){
                System.out.println(myRecord.get(x));
            }
            startHere();
        }else{
            System.out.println("Class Record is full!");
            startHere();
        }
    }
    
    public static void main(String[] args){
        classrecord cr = new classrecord();
        cr.startHere();
    }


    private int getGradeSize() {
        return gradeSize;
    }


    private void setGradeSize(int gradeSize) {
        this.gradeSize = gradeSize;
    }


    private int getStudentSize() {
        return studentSize;
    }


    private void setStudentSize(int studentSize) {
        this.studentSize = studentSize;
    }
}

Wala pa ni mahuman og bati pagka himo....

Paki check nalang balik bro AMD_Earl.... sa IDE or sa Java siguro ni nagka problema.. naa ra ko gi-dugang gamay sa code aron mo-work sa lower version.. I think.. basta ok na siya sa amoa..

[jairoh_]

try daw ni boss. nag.dali2x ko ana ganiha udto wa nako mapost daun kai naputol ang net. sensya au. wa na cyay trappings and medjo bungkag ang codes kai nag.dali2x jud ko ani kai nakoi gbuhat. ikaw ra bahala ana. taronga lng ug input. i.modify lng ko palihog. gi.base ra nako ni sa imong post sa 1st page. . . goodluck! hope mutabang sad ka sa mga naglisod kai reha rata sauna. cge ko patudlo nila dri ni boss stealthghost, superstar ug etc.

/*
 * To change this template, choose Tools | Templates
 * and open the template in the editor.
 */
package applets;

import java.util.Scanner;


public class Istorya {
    
    private int id [];
    private String names [] ;
    private double [] [] grades;
    private static Scanner in;
    
    public Istorya(){
        in = new Scanner( System.in );
        System.out.println( "Enter number of students: " );
        int n = Integer.valueOf( in.nextLine() );
        System.out.println( "Enter number of grades: " );
        int n2 = Integer.valueOf( in.nextLine() );
        
        id = new int [n];
        names = new String [n];
        grades = new double [n] [n2];
        
        for( int x = 0; x < n; x++ ){
            System.out.println( "Enter student ID for student #"+(x+1)+":" );
            id [ x ] = Integer.valueOf( in.nextLine() );
            System.out.println( "Enter name for student ID # "+id[x]+":" );
            names [ x ] = in.nextLine();
            
            for( int y = 0; y < n2; y++ ){
                System.out.println( "Enter grade # "+ (y+1)+" for student id # "+id[x]+": " );
                grades [ x ] [ y ] = Double.valueOf( in.nextLine() );
            }
            
            System.out.println();
        }
        
        
        
        while( true ){
            ChooseOption();
        }
        
    }
    
    public void ChooseOption(){
        System.out.println( "\n[1]show records [2]delete student [3]edit student [4]exit\nChoose: " );
        int a = Integer.valueOf( in.nextLine() );
        switch( a ){
        
            case 1:
                        for( int x = 0; x < id.length; x++ ){
                            if( id [ x ] != 0 ){
                            System.out.println( "ID: "+id[x] );
                            System.out.println( "Name: "+names[x] );
                            
                            System.out.print( "Grades: " );
                                for( int y = 0; y < grades[x].length; y++ ){
                                    System.out.print( grades [x] [y] +" ");
                                }
                            System.out.println();
                            }
                        }
                break;
                
            case 2:
                System.out.println( "Delete id #:" );
                int id = Integer.valueOf( in.nextLine() );
                boolean found = false;
                        
                for( int x = 0; x < this.id.length; x++ ){
                    if( id == this.id[x]){
                        this.id [ x ] = 0;
                        names [ x ] ="";
                        for( int y = 0; y < grades[x].length; y++ ){
                            grades [ x ] [ y ] = 0; 
                        }
                        
                        found = true;
                        break;
                    }
                }
                
                if( found == true )System.out.println( "Student delteded" );
                else System.out.println( "student not found");
                
                break;
                
            case 3:
                System.out.println( "Update id student id#:" );
                int id_ = Integer.valueOf( in.nextLine() );
                found = false;
                        
                for( int x = 0; x < this.id.length; x++ ){
                    if( id_ == this.id[x]){
                        System.out.println( "Enter new name:" );
                        names [ x ] = in.nextLine();
                        for( int y = 0; y < grades[x].length; y++ ){
                            System.out.println( "Enter grade #"+(y+1)+" for student id #"+this.id[x]+":" );
                            grades [ x ] [ y ] = Double.valueOf( in.nextLine() ); 
                        }
                        
                        found = true;
                        break;
                    }
                }
                
                if( found == true )System.out.println( "Student updated" );
                else System.out.println( "student not found");
                
                break;
                
            case 4:
                System.exit(0);
                break;
        }
        
    }
    
    
    
    
    
    
    
    public static void main( String args [] ){
        new Istorya();
    }
}

[stealthghost]

import java.util.HashMap;
import java.util.Map;
import java.util.Scanner;


public class classrecord {
    
    private Map<String, Map<String, String>> myRecord = new HashMap<String, Map<String, String>>();
    final Scanner scanIn = new Scanner(System.in);
    private int studentSize, gradeSize;
    String myChoice = "";
    
    private void startHere(){
        try{
            switch(menu()){
                case 0: System.exit(0);
                        break;
                case 1: initializeRecord();
                        break;
                case 2: newStudentRecord();
                        break;
                case 3: showClassRecord();
                        break;
                case 4: deleteStudentRecord();
                        break;
                case 5: editStudentRecord();
                        break;
                default: 
                        System.out.println(":::::::::::::::::::::::::::::");
                        System.out.println(":::::: Invalid choice! ::::::");
                        System.out.println(":::::::::::::::::::::::::::::");
                        System.out.println("!---------------------------!");
                        startHere();
                        break;
            }
        }catch(NumberFormatException e){
            System.out.println(":::::::::::::::::::::::::::::");
            System.out.println(":::::: Invalid choice! ::::::");
            System.out.println(":::::::::::::::::::::::::::::");
            System.out.println("!---------------------------!");
            startHere();
        }
    }


    private int menu(){
        System.out.println(":::::::::::::::::::::::::::::");
        System.out.println(":::::: My Class Record ::::::");
        System.out.println(":::::::::::::::::::::::::::::");
        System.out.println("[1] Initialize Record");
        System.out.println("[2] Enter Student Record");
        System.out.println("[3] Show Class Record");
        System.out.println("[4] Delete Student");
        System.out.println("[5] Edit Student");
        System.out.println("[0] Exit");
        System.out.println(":::::::::::::::::::::::::::::");
        return Integer.parseInt(scanIn.nextLine().trim());
    }
    
    private void initializeRecord(){
        if(getStudentSize()<=0){
            try{
                System.out.println(":::::::::::::::::::::::::::::");
                System.out.println("::::: Initiliaze Record::::::");
                System.out.println(":::::::::::::::::::::::::::::");
                System.out.println("[C] to cancel.");
                System.out.println("Enter class size: ");
                myChoice = scanIn.nextLine().trim();
                setStudentSize(Integer.parseInt(myChoice));
                initNumberOfGrades();
            }catch(NumberFormatException nfe){
                if(myChoice.trim().equalsIgnoreCase("c")){
                    notifyCancelled();
                    setStudentSize(0);
                    startHere();
                }
                System.out.println("Please enter INTEGER only!");
                initializeRecord();
            }
        }else{
            System.out.println(":::::::::::::::::::::::::::::");
            System.out.println("::::: Done Initialized! :::::");
            System.out.println(":::::::::::::::::::::::::::::");
            System.out.println("!---------------------------!");
            startHere();
        }
    }
    
    private void initNumberOfGrades(){
        if(getStudentSize()<=0){
            initializeRecord();
        }
        if(getGradeSize()>0 || getStudentSize()<=0){
            System.out.println("Invalid Access");
        }
        if(getGradeSize()<=0 && getStudentSize()>0){
            try{
                System.out.println("[C] to cancel.");
                System.out.println("Enter number of grades: ");
                myChoice = scanIn.nextLine().trim();
                setGradeSize(Integer.parseInt(myChoice));
            }catch(NumberFormatException nfe){
                if(myChoice.trim().equalsIgnoreCase("c")){
                    notifyCancelled();
                    //Reset sizes to 0
                    setStudentSize(0);
                    setGradeSize(0);
                    //go back to menu
                    startHere();
                }
                System.out.println("Please enter INTEGER only!");
                initNumberOfGrades();
            }
            System.out.println("Class Size: "+getStudentSize());
            System.out.println("Number of Grades: "+getGradeSize());
            startHere();
        }
    }
    
    private void newStudentRecord(){
        //Checks if na-init na ang record
        if(getStudentSize()<=0){
            System.out.println(":::::::::::::::::::::::::::::");
            System.out.println("::::: Init Record First :::::");
            System.out.println(":::::::::::::::::::::::::::::");
            startHere();
        }
        if(myRecord.size()<getStudentSize() && getStudentSize()>0){
            System.out.println(":::::::::::::::::::::::::::::");
            System.out.println(":::::::: New Student ::::::::");
            System.out.println(":::::::::::::::::::::::::::::");
            Map<String, String> newStudent = new HashMap<String, String>();
            String id;
            //Enters ID of student
            System.out.println("[C] to Cancel");
            System.out.println("Enter ID:");
            id = scanIn.nextLine().trim();
            
            if(id.equalsIgnoreCase("c")){
                notifyCancelled();
                startHere();
            }
            if(idExists(id)){
                System.out.println(":::::::::::::::::::::::::::::");
                System.out.println(":::: Already in Database! :::");
                System.out.println("::::: Please try again! :::::");
                System.out.println(":::::::::::::::::::::::::::::");
                System.out.println("!---------------------------!");
                newStudentRecord();
            }else{
                //put ID in database
                newStudent.put("ID", id);
                
                //Enters name of student
                System.out.println("[C] to Cancel");
                System.out.println("Enter student name: ");
                myChoice = scanIn.nextLine().trim();
                if(myChoice.equalsIgnoreCase("c")){
                    notifyCancelled();
                    startHere();
                }
                newStudent.put("name",myChoice);
                
                //Enters grade of student
                for(int x=0;x<getGradeSize();x++){
                    System.out.println("Enter Grade ["+x+"]: ");
                    myChoice = scanIn.nextLine().trim();
                    newStudent.put(String.valueOf(x),myChoice);
                }
                myRecord.put(id,newStudent);
                startHere();
            }
        }else{
            System.out.println("Class Record is full!");
            startHere();
        }
    }
    
    private void showClassRecord(){
        checkpoint();
        System.out.println(":::::::::::::::::::::::::::::");
        System.out.println(":::::: Start of Record ::::::");
        for(String keys : myRecord.keySet()){
            System.out.println("ID: ["+myRecord.get(keys).get("ID")+"]");
            System.out.println("Name: "+myRecord.get(keys).get("name"));
            System.out.println("::::::::::: Grades ::::::::::");
            for(int x=0;x<getGradeSize();x++){
                try{
                    System.out.println("Grade No.["+x+"]: "+myRecord.get(keys).get(String.valueOf(x)));
                }catch(Exception e){
                    System.out.println("No record on Grade no.: ["+x+"]");
                }
            }
            System.out.println("!---------------------------!");
        }
        System.out.println("::::::: End of Record :::::::");
        System.out.println(":::::::::::::::::::::::::::::");
        System.out.println("!---------------------------!");
        startHere();
    }
    
    private void deleteStudentRecord(){
        checkpoint();
        //lahos diri kung naa'y record or na-initialize na..
        System.out.println(":::::::::::::::::::::::::::::");
        System.out.println(":::::: Delete Student :::::::");
        System.out.println(":::::::::::::::::::::::::::::");
        for(String keys : myRecord.keySet()){
            System.out.println(":::::::::::::::::::::::::::::");
            System.out.println("ID: "+myRecord.get(keys).get("ID"));
            System.out.println("Name: "+myRecord.get(keys).get("name"));
            System.out.println(":::::::::::::::::::::::::::::");
        }
        System.out.println("[C] to Cancel");
        System.out.println("Please Choose ID:");
        myChoice = scanIn.nextLine().trim();
        if(myChoice.equalsIgnoreCase("c")){
            notifyCancelled();
            startHere();
        }
        if(idExists(myChoice)){
            myRecord.remove(myChoice);
            System.out.println(":::::::::::::::::::::::::::::");
            System.out.println(":::::: Student Deleted ::::::");
            System.out.println(":::::::::::::::::::::::::::::");
            System.out.println("!---------------------------!");
        }else{
            System.out.println(":::::::::::::::::::::::::::::");
            System.out.println("::::: Student Not Found :::::");
            System.out.println(":::::::::::::::::::::::::::::");
            System.out.println("!---------------------------!");
            deleteStudentRecord();
        }
        startHere();
    }
    
    private void editStudentRecord(){
        checkpoint();
        System.out.println(":::::::::::::::::::::::::::::");
        System.out.println("::::::: Edit Student ::::::::");
        System.out.println(":::::::::::::::::::::::::::::");
        for(String keys : myRecord.keySet()){
            System.out.println(":::::::::::::::::::::::::::::::::::");
            System.out.println("ID: "+myRecord.get(keys).get("ID"));
            System.out.println("Name: "+myRecord.get(keys).get("name"));
            System.out.println(":::::::::::::::::::::::::::::::::::");
        }
        
        System.out.println("[C] to Cancel");
        System.out.println("Please Choose ID:");
        String id = scanIn.nextLine().trim();
        if(id.equalsIgnoreCase("c")){
            notifyCancelled();
            startHere();
        }
        if(idExists(id)){
            Map<String, String> modifyStudent = new HashMap<String, String>();
            modifyStudent.put("ID", id);
            System.out.println("Enter student name: ");
            myChoice = scanIn.nextLine().trim();
            modifyStudent.put("name",myChoice);
            //Enters grade of student
            for(int x=0;x<getGradeSize();x++){
                System.out.println("Enter grade no. ["+x+"]: ");
                myChoice = scanIn.nextLine().trim();
                modifyStudent.put(String.valueOf(x),myChoice);
            }
            
            myRecord.put(id, modifyStudent);
            System.out.println(":::::::::::::::::::::::::::::");
            System.out.println("::::: Student Modified ::::::");
            System.out.println(":::::::::::::::::::::::::::::");
            System.out.println("!---------------------------!");
            startHere();
        }else{
            System.out.println(":::::::::::::::::::::::::::::");
            System.out.println("::::: Record not found! :::::");
            System.out.println(":::::::::::::::::::::::::::::");
            System.out.println("!---------------------------!");
            editStudentRecord();
        }
    }
    
    private boolean idExists(String id){
        boolean exists = false;
        for(String keys : myRecord.keySet()){
            if(keys.equalsIgnoreCase(id)){
                exists = true;
            }
        }
        return exists;
    }
    
    public static void main(String[] args){
        classrecord cr = new classrecord();
        cr.startHere();
    }




    private int getGradeSize() {
        return gradeSize;
    }




    private void setGradeSize(int gradeSize) {
        this.gradeSize = gradeSize;
    }




    private int getStudentSize() {
        return studentSize;
    }




    private void setStudentSize(int studentSize) {
        this.studentSize = studentSize;
    }
    
    private void notifyCancelled(){
        System.out.println(":::::::::::::::::::::::::::::");
        System.out.println("::: Transaction cancelled :::");
        System.out.println(":::::::::::::::::::::::::::::");
        System.out.println("!---------------------------!");
    }
    
    private void checkpoint(){
        //Checks if na-init na ang record
        if(getStudentSize()<=0){
            System.out.println(":::::::::::::::::::::::::::::");
            System.out.println("::::: Init Record First :::::");
            System.out.println(":::::::::::::::::::::::::::::");
            System.out.println("!---------------------------!");
            startHere();
        }
        //Check if naa record...
        if(myRecord.size()<=0){
            System.out.println(":::::::::::::::::::::::::::::");
            System.out.println("::::: Record not found! :::::");
            System.out.println(":::::::::::::::::::::::::::::");
            System.out.println("!---------------------------!");
            startHere();
        }
    }
}

Kani pud TS, try lang..

Delete lang mga ::::::: kung ganahan ka bro.. kamo nalang edit sa pagka Console GUI niya..

UPDATED