Thread: JOptionPane menu and multiple methods

//Now bare with me, I'm not the best coder. What I'm trying to do in my coding is create a JOptionPane web. That is what I'm having trouble with, my menus don't quite work right yet. If you could help me or //lead me in the right direction, it would be very much appreciated.

import java.io.File;
import java.io.FileNotFoundException;
import java.util.Scanner;
import javax.swing.JOptionPane;
import java.lang.NumberFormatException;
import java.util.LinkedList;
 
public class StudentTester {
 
	public static void main(String[] args) throws FileNotFoundException, NumberFormatException {
		//for (;;) {
			Scanner in = new Scanner(System.in);
			JOptionPane mainmenu = new JOptionPane();
 
			//Scanner input = new Scanner(System.in);
 
			LinkedList<Student> students = new LinkedList<Student>();
 
			boolean isTrue = false;
			while (isTrue == false)
			{
 
			int num = 0;
 
			while (num != 6) {
 
 
					int input1 = Integer.parseInt(mainmenu.showInputDialog(null,"1 Please type the path to the .txt you wish to import\n2  How would you like to search for your record?\n3  Insert the Students Name\n4  Remove a Student\n5  How would you like to order your report?\n6  View the updated records\n7  Exit\n"));
 
					num = input1;
 
 
 
 
				if(num == 1){
 
					JOptionPane importFile = new JOptionPane();
 
					  Scanner filein= new Scanner(System.in);
                      importFile.showInputDialog(null,"Input File: ");
				      String inputFileName = filein.next();
 
                      System.out.println("Hi");
 
				      File inputFile = new File(inputFileName);
				      Scanner infile = new Scanner(inputFile);
 
 
					while (infile.hasNext()) {
						students.add(new Student(infile.nextInt(), infile.next(), infile
								.nextDouble()));					
						infile.close();
 
					}
				}
 
 
 
 
 
 
					else if (num == 2){
					int num1 = 0;
					JOptionPane searchType = new JOptionPane();
					while (num1 != 4) {
						int input2 = Integer.parseInt(searchType.showInputDialog(null,"1 Name\n2 ID\n3 GPA\n4 Back\n"));
						num1 = input2;
 
 
 
						if (num1== 1){
							JOptionPane lastName = new JOptionPane();// student's
																	// name
																	// search
							lastName.showInputDialog(null, "Student Name: ");
							String name = "";
 
 
							boolean found = false;
							for (Student s : students) {
								if (s.getLastName().equals(lastName))
									found = true;
 
							}
							if (found)
								JOptionPane.showMessageDialog(null,"A student was found");
							else
								JOptionPane.showMessageDialog(null,"A student was not found");
						}
 
 
 
							else if (num1==2){
							JOptionPane sID = new JOptionPane();// student's ID
																// search
							sID.showInputDialog(null, "ID");
							int id = Integer.parseInt(JOptionPane.showInputDialog(null,
									"What in the ID of the Student you are looking for?"));
							String result = "";
 
							for (Student s : students) {
								if (s.getId() == id) {
									result += s;
								}
 
							}
 
						}
 
 
							else if (num1==3){
							JOptionPane sGPA = new JOptionPane();// students"
																	// GPA
																	// search
							sGPA.showInputDialog(null, "GPA");
						}
 
							else if (num1==4){
							JOptionPane sMes = new JOptionPane();// back send
																	// back to
						}									// main menu
 
							else{
							JOptionPane.showMessageDialog(null,
									"Invalid Choice");
							}
					}
					}
 
 
 
 
 
			else if (num == 3){
					String fullName = "";
					String number11 = "";
					String number22 = "";
					int number1 = 0;
					double number2 = 0;
					JOptionPane addStudent = new JOptionPane();
					fullName = addStudent.showInputDialog(null, "Name: ");
 
					number11 = addStudent.showInputDialog(null, "ID: ");
					number22 = addStudent.showInputDialog(null, "GPA: ");
					number1 = Integer.parseInt(number11);
					number2 = Double.parseDouble(number22);
 
			}
 
 
			else if (num == 4){
					JOptionPane rStudent = new JOptionPane();
					rStudent.showInputDialog(null, "Name");
					students.remove("");
			}
 
 
			else if (num == 5){
					String output = "";
					JOptionPane outReport = new JOptionPane();
					//output = outReport.showInputDialog("Enter output name");
					//PrintWriter out = new PrintWriter(output);
			}
 
 
			else if (num == 6){
					JOptionPane vRoster = new JOptionPane();
					vRoster.showMessageDialog(null, students);
			}
 
			else if (num == 7){
					JOptionPane mesDefault = new JOptionPane();
					mesDefault.showMessageDialog(null, "Exited");
					System.exit(0);
			}
			else{
					JOptionPane.showMessageDialog(null, "Invalid Choice");
 
 
			}
			}
			}
			}
 
 
	}

I guess, I didn't clarify enough for an answer?

ok here is my update code so far, My problem is I'm having trouble inputing a text file into my LinkedList through JOptionPane. I want to be able to type the direct path, but I keep getting errors. Here is the error message: Exception in thread "main" java.util.InputMismatchException
at java.util.Scanner.throwFor(Unknown Source)
at java.util.Scanner.next(Unknown Source)
at java.util.Scanner.nextInt(Unknown Source)
at java.util.Scanner.nextInt(Unknown Source)
at StudentTester.main(StudentTester.java:51)

update code: Don't mind commented out sections, I just did that for I can focus on one part at a time

import java.io.File;
import java.io.FileNotFoundException;
import java.util.Scanner;
import javax.swing.JOptionPane;
import java.lang.NumberFormatException;
import java.util.LinkedList;
 
public class StudentTester {
 
	public static void main(String[] args) throws  NumberFormatException {
		//for (;;) {
			//Scanner in = new Scanner(System.in);
		//	JOptionPane mainmenu = new JOptionPane();
 
			//Scanner input = new Scanner(System.in);
 
 
			LinkedList<Student> students = new LinkedList<Student>();
			boolean isTrue = false;
			while (isTrue == false)
			{
 
			int num = 0;
 
			while (num != 6) {
 
 
					int input1 = Integer.parseInt(JOptionPane.showInputDialog(null,"1 Please type the path to the .txt you wish to import\n2  How would you like to search for your record?\n3  Insert the Students Name\n4  Remove a Student\n5  How would you like to order your report?\n6  View the updated records\n7  Exit\n"));
 
					num = input1;
 
 
 
 
				if(num == 1){
 
					//JOptionPane importFile = new JOptionPane();
 
					 System.out.println("Hi");
 
                     String inputFileName = JOptionPane.showInputDialog(null,"Input File: ");
 
 
 
 
				      File inputFile = new File(inputFileName);
				   try{   
					   Scanner in = new Scanner(inputFile);
				   while (in.hasNext()) {
						students.add(new Student(in.nextInt(), in.next(), in
								.nextDouble()));					
						in.close();
				   }
}
catch(FileNotFoundException e){
	System.out.println("File Not Found");
}
 
 
 
 
					}
			}
			}
	}
}
 
 
 
					/*else if (num == 2){
					int num1 = 0;
 
					while (num1 != 4) {
						int input2 = Integer.parseInt(JOptionPane.showInputDialog(null,"1 Name\n2 ID\n3 GPA\n4 Back\n"));
						num1 = input2;
 
 
 
						if (num1== 1){
							// student's
																	// name
																	// search
							JOptionPane.showInputDialog(null, "Student Name: ");
							String name = "";
 
 
							boolean found = false;
							for (Student s : students) {
								if (s.getLastName().equals(name))
									found = true;
 
							}
							if (found)
								JOptionPane.showMessageDialog(null,"A student was found");
							else
								JOptionPane.showMessageDialog(null,"A student was not found");
						}
 
 
 
							else if (num1==2){
							// student's ID
																// search
 
							int id = Integer.parseInt(JOptionPane.showInputDialog(null,
									"What in the ID?"));
							String result = "";
 
							for (Student s : students) {
								if (s.getId() == id) {
									result += s;
								}
 
							}
 
						}
 
 
							else if (num1==3){
								int gpa = Integer.parseInt(JOptionPane.showInputDialog(null,
										"What in the GPA?"));
 
							String result = "";
							for (Student s : students) {
								if (s.getGpa() == gpa) {
									result += s;										// GPA
																	// search
 
						}
 
							else if (num1==4){
							JOptionPane sMes = new JOptionPane();// back send
																	// back to
						}									// main menu
 
							else{
							JOptionPane.showMessageDialog(null,
									"Invalid Choice");
							}
					}
					}
 
 
 
 
 
			else if (num == 3){
					String fullName = "";
					String number11 = "";
					String number22 = "";
					int number1 = 0;
					double number2 = 0;
 
					fullName = JOptionPane.showInputDialog(null, "Name: ");					
					number11 = JOptionPane.showInputDialog(null, "ID: ");
					number22 = JOptionPane.showInputDialog(null, "GPA: ");
					number1 = Integer.parseInt(number11);
					number2 = Double.parseDouble(number22);
 
			}
 
 
			else if (num == 4){
 
					JOptionPane.showInputDialog(null, "Name");
					students.remove("");
			}
 
 
			else if (num == 5){
					JOptionPane.showMessageDialog(null, students);
					//output = outReport.showInputDialog("Enter output name");
					//PrintWriter out = new PrintWriter(output);
			}
 
 
			else if (num == 6){
					JOptionPane vRoster = new JOptionPane();
					JOptionPane.showMessageDialog(null, students);
			}
 
			else if (num == 7){
					JOptionPane mesDefault = new JOptionPane();
					JOptionPane.showMessageDialog(null, "Exited");
					System.exit(0);
			}
			else{
					JOptionPane.showMessageDialog(null, "Invalid Choice");
 
 
			}
			}
			}
			}
 
 
			}
	}
}
 
 
	*/