Not getting whole string when string has space in java

Question

I'm still new to java, so dumb question is coming. I've been working on a simple software using JFrame, PrintWriter, File, and Scanner to create and read a text file, I save the file with the name you typed and then with the data you input into a JTextField, the problem is: As soon as you type one space it doesn't save the text after the space to the .txt file:

Input

waitFor it

   WriteToFile(textarea.getText(), name.getText());
// my function   input text         name

Output:

waitFor

But if I input the text manually this way:

   WriteToFile("waitFor it", name.getText());
// my function   input text         name

Output:

waitFor it

Which leads me to think that my function might not be causing this, but again I'm a noob.

Main.java

package creator;

import java.awt.Font;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.KeyEvent;
import java.awt.event.KeyListener;

import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JScrollPane;
import javax.swing.JTextField;


import library.Database;

public class Main extends Database{

    public static void main(String[] args) {

        JFrame frame = new JFrame();

        JButton button = new JButton("Erase");
        JButton button2 = new JButton("Add");
        JButton button3 = new JButton("Save to Database");

        Font font = new Font("Courier", Font.BOLD, 12);
        Font font2 = new Font("Courier", Font.BOLD, 14);

        final JTextField name = new JTextField();
        final JTextField editorPane = new JTextField();
        final JTextField textarea = new JTextField();

        final JScrollPane scroll = new JScrollPane (textarea, 
        JScrollPane.VERTICAL_SCROLLBAR_NEVER, JScrollPane.HORIZONTAL_SCROLLBAR_ALWAYS);

        frame.setTitle("Array Creator");
        frame.setSize(401, 250);
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        frame.setLocationRelativeTo(null);
        frame.setResizable(false);
        frame.setLayout(null);

        frame.add(button);
        frame.add(name);
        frame.add(button2);
        frame.add(button3);
        frame.add(editorPane);
        frame.add(scroll);

        button.setBounds(0, 200, 80, 22);
        name.setBounds(82, 200, 80, 22);
        button2.setBounds(164, 200, 80, 22);
        button3.setBounds(246, 200, 148, 22);
        editorPane.setBounds(100,175,200,18);
        scroll.setBounds(50, 10, 300, 160);
        textarea.setEditable(false);

        button.setFont(font);
        name.setFont(font); 
        button2.setFont(font);
        button3.setFont(font); 
        editorPane.setFont(font);
        textarea.setFont(font2);

        textarea.setText("[");

        frame.setVisible(true);

        button.addActionListener(new ActionListener() {
            public void actionPerformed(ActionEvent arg0) {
                textarea.setText("[");
                editorPane.setText("");
            }
        });
        button2.addActionListener(new ActionListener() {
            public void actionPerformed(ActionEvent arg0) {
                textarea.setText(textarea.getText()+"["+editorPane.getText()+"],");
                editorPane.setText("");
            }
        });
        button3.addActionListener(new ActionListener() {
            public void actionPerformed(ActionEvent arg0) {
                String temp = textarea.getText();
                temp = temp.substring(0, temp.length()-1);
                textarea.setText(temp+"]");
                editorPane.setText("");
                WriteToFile(textarea.getText(), name.getText());
            }
        });
        name.addKeyListener(new KeyListener() {
            public void keyTyped(KeyEvent arg0) {
            }

            public void keyReleased(KeyEvent arg0) {
                textarea.setText(readFile(name.getText()));
            }

            public void keyPressed(KeyEvent arg0) { 
            }
        });

    }

}

Database.java

package library;

import java.io.File;
import java.io.FileNotFoundException;
import java.io.PrintWriter;
import java.io.UnsupportedEncodingException;
import java.util.Scanner;

public class Database {

    public static String WriteToFile(String data, String name){
        String output = "ERROR";
        PrintWriter writer = null;
        try {
            writer = new PrintWriter(name+".txt", "UTF-8");
        } catch (FileNotFoundException e) {
            e.printStackTrace();
        } catch (UnsupportedEncodingException e) {
            e.printStackTrace();
        }
        writer.println(data);
        writer.close();

        File file = new File(name+".txt");
        try {
            @SuppressWarnings("resource")
            Scanner sc = new Scanner(file);
            output = sc.next();
        } catch (FileNotFoundException e) {
            e.printStackTrace();
        }

        return output;
    }

    public static String readFile(String name){
        String output = "[";
        File file = new File(name+".txt");
        try {
            @SuppressWarnings("resource")
            Scanner sc = new Scanner(file);
            output = sc.next();
        } catch (FileNotFoundException e) {

        }

        return output;
    }

}

May someone provide me an explanation on why this is?

Instead output = sc.next(); use output = sc.nextLine();. — SatyaTNV
– SatyaTNV, Commented Feb 18, 2016 at 10:57
Avoid using null layouts, pixel perfect layouts are an illusion within modern ui design. There are too many factors which affect the individual size of components, none of which you can control. Swing was designed to work with layout managers at the core, discarding these will lead to no end of issues and problems that you will spend more and more time trying to rectify — MadProgrammer
– MadProgrammer, Commented Feb 18, 2016 at 11:01
KeyListener is not your best choice with text components, instead, you should use a ActionListener to monitor for the [Enter] key or a DocumentLstener to listen for changes to the document or a DocumentFilter to filter what the field will accept — MadProgrammer
– MadProgrammer, Commented Feb 18, 2016 at 11:03
While this doesn't have to do anything with the problem, I suggest you to read oracle.com/technetwork/java/codeconventions-135099.html - your methods should start with a lowercase letter. — neuromouse
– neuromouse, Commented Feb 18, 2016 at 11:04
@Mr.Derpinthoughton Because, to put it frankly, there are so many factors which affect a components size, you "might" think that you're getting control and it "looks" nice, but the moment the screen and/or the video card and/or resolution and/or the font size and/or DPI changes, all that "pretty" layout goes to garbage. Efficient UI layout is actually quite complex with no "real" solution, but many possibilities, the layout manager API supplied by Swing is just one. iOS just when through 4 years of "redesign", introducing auto layouts, because they originally only had two screen sizes :P — MadProgrammer
– MadProgrammer, Commented Feb 18, 2016 at 11:12

Community · Accepted Answer · 2017-05-23 11:50:35Z

5

Instead

output = sc.next();

use

output = sc.nextLine();

Reference: Scanner#next() vs Scanner#nextLine()

edited May 23, 2017 at 11:50

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answered Feb 18, 2016 at 11:02

SatyaTNV

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