Question

With the Code below, how would i add a "Back" Button to the bottom of the history page so that it takes me back to the main function and continues to work?

import java.awt.BorderLayout;

import java.awt.Color;

import java.awt.Dimension;

import java.awt.GridLayout;

import java.awt.event.ActionEvent;

import java.awt.event.ActionListener;

import java.io.File;

import java.io.FileNotFoundException;

import java.io.FileWriter;

import java.io.IOException;

import java.util.ArrayList;

import java.util.List;

import java.util.Scanner;

import javax.swing.BoxLayout;

import javax.swing.JButton;

import javax.swing.JFrame;

import javax.swing.JLabel;

import javax.swing.JPanel;

import javax.swing.JScrollPane;

import javax.swing.JTextField;

public class RecipeFinder {

public static void main(String[] args) {

//JFrame

JFrame frame = new JFrame("The Recipe Finder");

frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

frame.setPreferredSize(new Dimension(400,400));

//JPanel

JPanel entry = new JPanel();

entry.setLayout(new BoxLayout(entry, BoxLayout.Y_AXIS));

//JLabel

JLabel insert = new JLabel("Insert Food/Ingredients");

entry.add(insert);

entry.setBackground(Color.red);

//JTextField(s)

JTextField foodOne = new JTextField();

foodOne.setMaximumSize(new Dimension(400,48));

foodOne.setMinimumSize(new Dimension(400,48));

entry.add(foodOne);

JTextField foodTwo = new JTextField();

foodTwo.setMaximumSize(new Dimension(400,48));

foodTwo.setMinimumSize(new Dimension(400,48));

entry.add(foodTwo);

JTextField foodThree = new JTextField();

foodThree.setMaximumSize(new Dimension(400,48));

foodThree.setMinimumSize(new Dimension(400,48));

entry.add(foodThree);

//JButton(s)

JButton addTextBox = new JButton("Add");

List<JTextField> listOfTextFields = new ArrayList<JTextField>();

addTextBox.addActionListener(new ActionListener() {

@Override

public void actionPerformed(ActionEvent e) {

JTextField newBox = new JTextField();

newBox.setMaximumSize(new Dimension(400,48));

newBox.setMinimumSize(new Dimension(400,48));

entry.add(newBox);

entry.revalidate();

frame.invalidate();

listOfTextFields.add(newBox);

}

});

JButton search = new JButton("Search Recipes");

search.addActionListener(new ActionListener() {

@Override

public void actionPerformed(ActionEvent e) {

try {

String search = foodOne.getText().toString().trim();

String search2 = foodTwo.getText().toString().trim();

String search3 = foodThree.getText().toString().trim();

search = search.replaceAll(" ", "+");

search2 = search2.replaceAll(" ", "+");

search3 = search3.replaceAll(" ", "+");

String searchFull = "Recipes+with+" + search + "+" + search2 + "+" + search3;

for(JTextField x:listOfTextFields) {

searchFull=searchFull + "+" + x.getText().toString().trim();

}

System.out.println(searchFull);

addRecipeToFile(searchFull);

String url = createURL(searchFull);

//String url = "https://www.google.com/search?source=hp&ei=LBOYXNDCJIO35gKnjafACw&q="+searchFull+"&btnK=Google+Search&oq="+searchFull+"&gs_l=psy-ab.3..35i39j0i20i263j0l8.1444.2813..2967...2.0..0.82.591.9......0....1..gws-wiz.....0..0i131i67j0i67j0i131.EWAGiq0bzRM#btnK=Google%20Search";

java.awt.Desktop.getDesktop().browse(java.net.URI.create(url));;

}

catch (java.io.IOException ex) {

System.out.println(ex.getMessage());

}

}

});

JButton recents = new JButton("History");

recents.addActionListener(new ActionListener() {

@Override

public void actionPerformed(ActionEvent e) {

JFrame history = new JFrame("Recipe History");

history.setLayout( new GridLayout(0, 1));

ArrayList<String> recipHistory = loadHistory();

for(String str : recipHistory) {

JButton button = new JButton(str.replace("+"," "));

button.addActionListener(new ActionListener() {

@Override

public void actionPerformed(ActionEvent e) {

String url = createURL(str);

try {

java.awt.Desktop.getDesktop().browse(java.net.URI.create(url));

} catch (IOException e1) {

}

}

});

JPanel panel = new JPanel();

panel.add(button);

panel.setBackground(Color.red);

history.add(panel);

}

history.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

history.setPreferredSize(new Dimension(400,400));

history.pack();

history.setVisible(true);

}

});

JPanel buttonPanel = new JPanel();

buttonPanel.add(addTextBox);

buttonPanel.add(search);

buttonPanel.add(recents);

buttonPanel.setBackground(Color.blue);

JPanel rootPanel = new JPanel();

rootPanel.setLayout(new BorderLayout());

rootPanel.add(entry, BorderLayout.CENTER);

rootPanel.add(buttonPanel, BorderLayout.SOUTH);

JScrollPane rootEntry = new JScrollPane(rootPanel);

rootEntry.setVerticalScrollBarPolicy(JScrollPane.VERTICAL_SCROLLBAR_ALWAYS);

rootEntry.setHorizontalScrollBarPolicy(JScrollPane.HORIZONTAL_SCROLLBAR_NEVER);

//FrameWork

frame.add(rootEntry);

frame.pack();

frame.setVisible(true);

}

private static void addRecipeToFile(String query) {

try {

FileWriter writer = new FileWriter(new File("history.txt"), true);

writer.write(query + "\n");

writer.close();

}catch (IOException e) {

e.printStackTrace();

}

}

private static String createURL(String searchFull) {

String url = "https://www.google.com/search?source=hp&ei=LBOYXNDCJIO35gKnjafACw&q="+searchFull+"&btnK=Google+Search&oq="+searchFull+"&gs_l=psy-ab.3..35i39j0i20i263j0l8.1444.2813..2967...2.0..0.82.591.9......0....1..gws-wiz.....0..0i131i67j0i67j0i131.EWAGiq0bzRM#btnK=Google%20Search";

return url;

}

private static ArrayList<String> loadHistory(){

ArrayList<String> history = new ArrayList<String>();

try {

Scanner scanner = new Scanner(new File("history.txt"));

while (scanner.hasNext()) {

history.add(scanner.nextLine());

}

scanner.close();

}catch (FileNotFoundException e) {

}

return history;

}

}

Answer 1

// Check the bold mark for the change

import java.awt.BorderLayout;

import java.awt.Color;

import java.awt.Dimension;

import java.awt.event.ActionEvent;

import java.awt.event.ActionListener;

import java.io.File;

import java.io.FileNotFoundException;

import java.io.FileWriter;

import java.io.IOException;

import java.util.ArrayList;

import java.util.List;

import java.util.Scanner;

import javax.swing.BoxLayout;

import javax.swing.JButton;

import javax.swing.JFrame;

import javax.swing.JLabel;

import javax.swing.JPanel;

import javax.swing.JScrollPane;

import javax.swing.JTextField;

public class RecipeFinder

{

static JPanel entry;

static JFrame frame;

static List<JTextField> listOfTextFields;

static JTextField foodOne, foodTwo, foodThree;

public static void main(String[] args)

{

//JFrame

frame = new JFrame("The Recipe Finder");

frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

frame.setPreferredSize(new Dimension(400,400));

//JPanel

entry = new JPanel();

entry.setLayout(new BoxLayout(entry, BoxLayout.Y_AXIS));

//JLabel

JLabel insert = new JLabel("Insert Food/Ingredients");

entry.add(insert);

entry.setBackground(Color.red);

//JTextField(s)

foodOne = new JTextField();

foodOne.setMaximumSize(new Dimension(400,48));

foodOne.setMinimumSize(new Dimension(400,48));

entry.add(foodOne);

foodTwo = new JTextField();

foodTwo.setMaximumSize(new Dimension(400,48));

foodTwo.setMinimumSize(new Dimension(400,48));

entry.add(foodTwo);

foodThree = new JTextField();

foodThree.setMaximumSize(new Dimension(400,48));

foodThree.setMinimumSize(new Dimension(400,48));

entry.add(foodThree);

//JButton(s)

JButton addTextBox = new JButton("Add");

listOfTextFields = new ArrayList<JTextField>();

addTextBox.addActionListener(new ActionListener()

{

@Override

public void actionPerformed(ActionEvent e)

{

JTextField newBox = new JTextField();

newBox.setMaximumSize(new Dimension(400,48));

newBox.setMinimumSize(new Dimension(400,48));

entry.add(newBox);

entry.revalidate();

frame.invalidate();

listOfTextFields.add(newBox);

}

});

JButton search = new JButton("Search Recipes");

search.addActionListener(new ActionListener()

{

@Override

public void actionPerformed(ActionEvent e)

{

try

{

String search = foodOne.getText().toString().trim();

String search2 = foodTwo.getText().toString().trim();

String search3 = foodThree.getText().toString().trim();

search = search.replaceAll(" ", "+");

search2 = search2.replaceAll(" ", "+");

search3 = search3.replaceAll(" ", "+");

String searchFull = "Recipes+with+" + search + "+" + search2 + "+" + search3;

for(JTextField x:listOfTextFields)

{

searchFull=searchFull + "+" + x.getText().toString().trim();

}

System.out.println(searchFull);

addRecipeToFile(searchFull);

String url = createURL(searchFull);

//String url = "https://www.google.com/search?source=hp&ei=LBOYXNDCJIO35gKnjafACw&q="+searchFull+"&btnK=Google+Search&oq="+searchFull+"&gs_l=psy-ab.3..35i39j0i20i263j0l8.1444.2813..2967...2.0..0.82.591.9......0....1..gws-wiz.....0..0i131i67j0i67j0i131.EWAGiq0bzRM#btnK=Google%20Search";

java.awt.Desktop.getDesktop().browse(java.net.URI.create(url));;

}

catch (java.io.IOException ex)

{

System.out.println(ex.getMessage());

}

}

});

JButton recents = new JButton("History");

recents.addActionListener(new ActionListener()

{

String str = "";

JFrame history;

@Override

public void actionPerformed(ActionEvent e)

{

history = new JFrame("Recipe History");

history.setLayout(new BorderLayout());

ArrayList<String> recipHistory = loadHistory();

//for(str : recipHistory)

for(int x = 0; x < recipHistory.size(); x++)

{

str = recipHistory.get(x);

JButton button = new JButton(str.replace("+"," "));

JButton back = new JButton("BACK");

button.addActionListener(new ActionListener()

{

@Override

public void actionPerformed(ActionEvent e)

{

String url = createURL(str);

try

{

java.awt.Desktop.getDesktop().browse(java.net.URI.create(url));

}

catch (IOException e1)

{

}

}

});

back.addActionListener(new ActionListener()

{

@Override

public void actionPerformed(ActionEvent e)

{

history.setVisible(false); //you can't see me!

history.dispose(); //Destroy the JFrame object

}

});

JPanel panel = new JPanel();

panel.setLayout(new BorderLayout());

panel.add(button, BorderLayout.NORTH);

panel.add(back, BorderLayout.SOUTH);

panel.setBackground(Color.red);

history.add(panel, BorderLayout.CENTER);

}

history.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

history.setPreferredSize(new Dimension(400,400));

history.pack();

history.setVisible(true);

}

});

JPanel buttonPanel = new JPanel();

buttonPanel.add(addTextBox);

buttonPanel.add(search);

buttonPanel.add(recents);

buttonPanel.setBackground(Color.blue);

JPanel rootPanel = new JPanel();

rootPanel.setLayout(new BorderLayout());

rootPanel.add(entry, BorderLayout.CENTER);

rootPanel.add(buttonPanel, BorderLayout.SOUTH);

JScrollPane rootEntry = new JScrollPane(rootPanel);

rootEntry.setVerticalScrollBarPolicy(JScrollPane.VERTICAL_SCROLLBAR_ALWAYS);

rootEntry.setHorizontalScrollBarPolicy(JScrollPane.HORIZONTAL_SCROLLBAR_NEVER);

//FrameWork

frame.add(rootEntry);

frame.pack();

frame.setVisible(true);

}

private static void addRecipeToFile(String query)

{

try

{

FileWriter writer = new FileWriter(new File("history.txt"), true);

writer.write(query + "\n");

writer.close();

}

catch (IOException e)

{

e.printStackTrace();

}

}

private static String createURL(String searchFull)

{

String url = "https://www.google.com/search?source=hp&ei=LBOYXNDCJIO35gKnjafACw&q="+searchFull+"&btnK=Google+Search&oq="+searchFull+"&gs_l=psy-ab.3..35i39j0i20i263j0l8.1444.2813..2967...2.0..0.82.591.9......0....1..gws-wiz.....0..0i131i67j0i67j0i131.EWAGiq0bzRM#btnK=Google%20Search";

return url;

}

private static ArrayList<String> loadHistory()

{

ArrayList<String> history = new ArrayList<String>();

try

{

Scanner scanner = new Scanner(new File("history.txt"));

while (scanner.hasNext())

{

history.add(scanner.nextLine());

}

scanner.close();

}

catch (FileNotFoundException e)

{

}

return history;

}

}

Sample Output:

The Recipe Finder × E Recipe History Insert FoodIngredients Recipes with Add Search Recipes History BACK