3RD PARTIAL LAB

countingLines.java

/*Create a method that counts the total number of lines and words/numbers

in a file given by the user.

*/

import java.util.Scanner;
import java.io.*;
 
public class countingLines {
	public static void main(String [] args) {

		try {
				//Scans file
				Scanner input = new Scanner(System.in);
				Scanner file = new Scanner(new File(text2.txt));

				//Divides into tokens for second part of output
				StringTokenizer muchToken = new StringTokenizer(text2.txt)

				int lineCounter = 1;
				int wordCounter = 1;

				//As long as scanner contains a line in the next position, counter increase by one
				while (file.nextLine() != null){
					lineCounter = lineCounter + 1;
				}

				while (muchToken.hasMoreTokens){
					wordCounter = wordCounter + 1;
				}
		}
		catch (NoSuchElementException e) {
				break;
		}

		//Prints counter values (minus 1 to make up for the extra "1" when initialized)
		System.out.println("Numer of lines is equal to" + lineCounter-1);
		System.out.println("Number of words and/or numbers is equal to" + wordCounter-1)
	}
}


/*
text2.text (FOR TESTING)

i ran out
of ideas
420
such doge
smoke day every weed
not even trying

flipLines.java

/*
Write a method named flipLines that receives a Scanner for an input file

and writes to the console the same file's contents with each pair of lines 

reversed in order. 

*/



import java.util.Scanner;
import java.io.*;
 
public class flipLines {
	public static void main(String [] args) {

		
		Scanner input = new Scanner(System.in);
		Scanner file = new Scanner(new File(toFlip.txt));

		int lineCounter = 1;
		String[] lineString;
		String[] flippedLineString;


		while (file.nextLine() != null){
			lineCounter = lineCounter+1;
		}

		linestring = new String[lineCounter];

		//for loop fills the lineString array with elements of the text file
		for (int i=0; i<lineCounter i++){
			lineString[i] = file.nextLine();
		}

		for (int j=0; j<lineCounter; j++){
			flippedLineString[i]   = lineString[i+1];
			flippedLineString[i+1] = lineString[i];

		}

		// WRITE TO File

			try{
				PrintWriter writeFile = new PrintWriter(
										new BufferedWriter(
										new FileWriter(toFlip.txt)));

				for (int k=0; k<lineCounter; k++ ){
					writeFile.println(flippedLineString[k]);
				}
					writeFile.close;

			}
			catch (IOException e){
				System.err.println("There seems to be an error");

			}

reverseWriter.java

import java.util.Scanner;

public class reverseWriter {

	public static void main (String args[]){

		String[] fileContents;
		String[] reversedContents;
		int count = 1;
			
		try {
				BufferedReader muchFile = new BufferedReader(
		   								   new FileReader(text.txt));

					StringTokenizer suchToken = new StringTokenizer(text.txt);

						while (suchToken.hasMoreTokens){
							count += count;

						}
						fileContents = new String[count];

							for (int i=0; i<count; i++){
								fileContents[i] = suchToken.nextToken;
							}

							for (int j=0; j<count; j++){
								reversedContents[j] = fileContents[count-j];
							}							

			} 
			catch (FileNotFoundException e) {
					System.err.println("There seems to be an error:\n" + e.getMessage());

			}
		}
}


	

Student.java

import java.io.*;
import java.util.*;
	public class studentClass{

		private String id, name;
		private double gpa;
		private int coursesTaken;

			public Student(String id, String name, double gpa, int coursesTaken){ 

			 
				this.id = id; 
				this.name = name; 
				this.gpa = gpa; 
				this.coursesTaken = coursesTaken; 
				} 

					public String getId(){ 
						return this.id; 
					} 

					public void setId(String id){
					 	this.id = id; 
					} 

					public String getName(){ 
						return this.name; 
					}

					public void setName(String name){ 
						this.name = name;
					} 

					public double getGpa(){ 
						return this.gpa;
					} 

					public void setGpa(double gpa){ 
						this.gpa = gpa;
					}

					public int getCoursestaken(){ 
						return this.coursesTaken; 
					} 

					public void setCoursestaken(int coursesTaken){ 
						this.coursesTaken = coursesTaken;
					} 

					public void dropOutCourse(int coursesTaken){ 

						if (this.coursesTaken != 0) {
							this.coursesTaken = coursesTaken - 1; 
						}
						else {
							return;
						}
					} 

					public void takesNewCourse(int coursesTaken){
				 		if (this.coursesTaken > 50){
				 			return;
				 		}  
				 		else{
				 			this.coursesTaken = coursesTaken + 1; 
				 		} 
				 	} 

				 	public String toString();{ 
				 		return ("Name: " + this.name + " id: " + this.id + " GPA: " + 
				 		        this.gpa + " Number of courses: " + this.coursesTaken); 
				 	} 
			 	
			 	}



				}

StudentApp.java

import java.io.*;
import java.util.Scanner;
/*0. Exit application. 

1. Read file. 

2. Modify Information. 

3. Store Information.*/
	public class StudentApp{

		
		public static void main(String[] args) {
		Scanner input = new Scanner(System.in);
		Scanner input = new Scanner(new File(student.txt));

		String studID = "";
		String studName = ""; 
		String answer;
		double studGPA = 0.0;
		int studCourses= 0;
		char options;

		Student estudent = new Student(studID, studName, studGPA, studCourses);


		System.out.println("Welcome to the StudentApp™ \n Please introduce:
		 \n '0' to exit the app
		 \n'1' to read a file 
		 \n'2' to modify information
		 \n or '3' to store information");

		answer = input.nextChar();
		options = answer.charAt(0);

			// O P T I O N S   M E N U
			switch(options){
				case '0':	System.out.println("Goodbye");
							break;
				case '1':	try{
 
								Scanner file = new Scanner(new File(filename));
									file.nextLine();
									id = file.nextLine();
									name = file.nextLine();
									gpa = file.nextDouble();
									coursesTaken = file.nextInt();
									file.close();
								} 
								catch(FileNotFoundException e) {
								System.err.println("Some exception happened @ " + e.getMessage());
								}
							break;
				case '2':	
							System.out.println("Input name of file you wish to modify");
							String filename2 = input.next() + ".txt";
							System.out.println("What shall be modified?" + 
												"\n" + "1) ID." + 
												"\n" + "2) Name." + 
												"\n" + "3) GPA." + 
												"\n" + "4) Courses taken." + 
												"\n" + "5) Create new Student.");
							int value2 = input.nextInt();
							Scanner file = new Scanner(new File(filename2));
							if(value2 == 1){
								System.out.println("Introduce the student's ID:");
								file.nextLine();
								id = input.next();
								file.nextLine();
								name = file.nextLine();
								gpa = file.nextDouble();
								coursesTaken = file.nextInt();
								file.close();
							 
							} else if(value2 == 2){
								System.out.println("Introduce the student's name:");
								file.nextLine();
								id = file.nextLine();
								name = input.next();
								file.nextLine();
								gpa = file.nextDouble();
								coursesTaken = file.nextInt();
								file.close();
								 
							} else if(value2 == 3){
								System.out.println("Introduce the student's GPA:");
								file.nextLine();
								id = file.nextLine();
								name = file.nextLine();
								gpa = input.nextDouble();
								file.nextLine();
								coursesTaken = file.nextInt();
								file.close();
							 
							} else if(value2 == 4){
								System.out.println("Introduce the number of courses taken:");
								file.nextLine();
								id = file.nextLine();
								name = file.nextLine();
								gpa = file.nextDouble();
								coursesTaken = input.nextInt();
								file.nextLine();
								file.close();
							 
							} else if(value2 == 5){
								System.out.println("Introduce the student's ID:");
								id = input.next();
								System.out.println("Introduce the student's name:");
								name = input.next();
								System.out.println("Introduce the student's gpa:");
								gpa = input.nextDouble();
								System.out.println("Introduce the number of courses taken:");
								coursesTaken = input.nextInt();
								}
								else break; 
							}
							break;
				
				case '3':	if(value ==3){
								try{
								PrintWriter storeInFile = new PrintWriter(
								new BufferedWriter(
								new FileWriter("student.txt")));
								storeInFile.print("\n" + estudent.toString());
								storeInFile.close();
									System.out.println("Information was stored.");
								} 
								catch (IOException e) {
									System.err.println("Some IOException occured @: " + e.getMessage());
								}
							}
							break;
				default :	System.out.println("Please type a valid option");
							break;												

			}