Set size of JTextField with BoyLayout Manager. Java
I have seen this question been answered. but not for BoxLayout. I have created a schedule app in Java and because I want to display every hour under each other, I have chosen BoxLayout. When every hour is displayed, everything looks perfect. However, before my method is called by clicking a button, the JTextField just takes up the whole screen (with the button). How do I make that different?
Main class:
public class Main {
public static void main(String[] args) {
JFrame window = new JFrame();
window.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
window.setResizable(true);
GamePanel gamepanel = new GamePanel();
window.add(gamepanel);
window.pack();
window.setLocationRelativeTo(null);
window.setVisible(true)
}
}
GamePanel Class:
public class GamePanel extends JPanel implements ActionListener {
//Screen Settings
final int originalTileSize = 16;
final int scale = 3;
final int tileSize = originalTileSize * scale;
final int maxScreenCol = 16;
final int maxScreenRow = 12;
final int screenWidth = tileSize * maxScreenCol;
final int screenHeight = tileSize * maxScreenRow;
//Initialize the things that are displayed
JButton knopf;
JTextField field;
Tage days;
String textInhalt;
static JLabel displayIsSchool;
static JLabel stunden;
static JLabel stunden1;
static JLabel stunden2;
static JLabel stunden3;
static JLabel stunden4;
static JLabel stunden5;
static JLabel stunden6;
static JLabel stunden7;
static JLabel stunden8;
//Panel constructor
public GamePanel(){
super();
this.setLayout(new BoxLayout(this, BoxLayout.Y_AXIS));
//JFrame stats
this.setPreferredSize(new Dimension(screenWidth, screenHeight));
this.setBackground(Color.darkGray);
this.setDoubleBuffered(true);
this.setFocusable(true);
//Initialize Text field
field = new JTextField();
field.setFont(new Font("Serif",Font.BOLD,30));
field.setPreferredSize(new Dimension (100, 50));
//Initialize Button
knopf = new JButton("klick");
knopf.addActionListener(this);
knopf.setPreferredSize(new Dimension (100, 35));
//Initialize isSchool
displayIsSchool = new JLabel("");
displayIsSchool.setForeground(Color.white);
displayIsSchool.setFont(new Font("Serif",Font.BOLD,30));
//Initialize stunden
stunden = new JLabel("");
stunden.setForeground(Color.white);
stunden.setFont(new Font("Serif",Font.BOLD,30));
stunden1 = new JLabel("");
stunden1.setForeground(Color.white);
stunden1.setFont(new Font("Serif",Font.BOLD,30));
stunden2 = new JLabel("");
stunden2.setForeground(Color.white);
stunden2.setFont(new Font("Serif",Font.BOLD,30));
stunden3 = new JLabel("");
stunden3.setForeground(Color.white);
stunden3.setFont(new Font("Serif",Font.BOLD,30));
stunden4 = new JLabel("");
stunden4.setForeground(Color.white);
stunden4.setFont(new Font("Serif",Font.BOLD,30));
stunden5 = new JLabel("");
stunden5.setForeground(Color.white);
stunden5.setFont(new Font("Serif",Font.BOLD,30));
stunden6 = new JLabel("");
stunden6.setForeground(Color.white);
stunden6.setFont(new Font("Serif",Font.BOLD,30));
stunden7 = new JLabel("");
stunden7.setForeground(Color.white);
stunden7.setFont(new Font("Serif",Font.BOLD,30));
stunden8 = new JLabel("");
stunden8.setForeground(Color.white);
stunden8.setFont(new Font("Serif",Font.BOLD,30));
//Add everything to JFrame
this.add(field);
this.add(knopf);
this.add(displayIsSchool);
this.add(stunden);
this.add(stunden1);
this.add(stunden2);
this.add(stunden3);
this.add(stunden4);
this.add(stunden5);
this.add(stunden6);
this.add(stunden7);
this.add(stunden8);
}
//Call Method for set Day
public void sayIf() {
//Switch statement for user Input
switch(textInhalt)
{
case "Montag":
Montag.sagName();
break;
case "Dienstag":
Dienstag.sagName();
break;
case "Mittwoch":
Mittwoch.sagName();
break;
case "Donnerstag":
Donnerstag.sagName();
break;
case "Freitag":
Freitag.sagName();
break;
case "Samstag":
Samstag.sagName();
break;
case "Sonntag":
Sonntag.sagName();
break;
}
}
//schedule
static String[] monHours = {"Bio", "Bio", "Mathe", "Mathe", "Chemie", "Chemie", "Frei", "Musik", "Musik"};
static String[] dinHours = {"Deutsch", "Mathe", "Physik", "Physik", "Englisch", "Frei", "Französisch", "Frei", "Frei"};
static String[] mitHours = {"Französisch", "Französisch", "Englisch", "Tutor", "Geschichte", "Geschichte", "Frei", "Sport", "Sport"};
static String[] donHours = {"Englisch", "Englisch", "Deutsch", "Deutsch", "Informatik", "Informatik", "Frei", "Frei", "Frei"};
static String[] freHours = {"PoWi", "PoWi", "Ethik", "Ethik", "Deutsch", "Frei", "Mathe", "Frei", "Frei"};
static String[] samHours = {"", "", "", "", "", "", "", "", ""};
static String[] sonHours = {"", "", "", "", "", "", "", "", ""};
//create Day objects
static Tage Montag = new Tage(true, monHours, "Montag");
static Tage Dienstag = new Tage(true, dinHours, "Dinestag") ;
static Tage Mittwoch = new Tage(true, mitHours, "Mittwoch") ;
static Tage Donnerstag = new Tage(true, donHours, "Donnerstag") ;
static Tage Freitag = new Tage(true, freHours, "Freitag") ;
static Tage Samstag = new Tage(false, samHours, "Samstag") ;
static Tage Sonntag = new Tage(false, sonHours, "Sonntag") ;
//keyListener
public void actionPerformed(ActionEvent e) {
if(e.getSource()==knopf) {
textInhalt = field.getText();
sayIf();
}
}
}
Tag (Day) Class:
package basicsPack;
public class Tage{
//Variables for constructor
boolean isSchool;
String[] stunden;
String name;
//Tage constructor
public Tage(boolean isSchool, String[] stunden, String name) {
this.isSchool = isSchool;
this.stunden = stunden;
this.name = name;
}
//sagName method
public void sagName() {
//Display hours an rather I have school
if(this.isSchool == true) {
GamePanel.displayIsSchool.setText("Du hast am "+ name + " Schule ");
GamePanel.stunden.setText(this.stunden[0]);
GamePanel.stunden1.setText(this.stunden[1]);
GamePanel.stunden2.setText(this.stunden[2]);
GamePanel.stunden3.setText(this.stunden[3]);
GamePanel.stunden4.setText(this.stunden[4]);
GamePanel.stunden5.setText(this.stunden[5]);
GamePanel.stunden6.setText(this.stunden[6]);
GamePanel.stunden7.setText(this.stunden[7]);
GamePanel.stunden8.setText(this.stunden[8]);
}else {
GamePanel.displayIsSchool.setText("Du hast am " + name + " keine Schule");
GamePanel.stunden.setText("");
GamePanel.stunden1.setText("");
GamePanel.stunden2.setText("");
GamePanel.stunden3.setText("");
GamePanel.stunden4.setText("");
GamePanel.stunden5.setText("");
GamePanel.stunden6.setText("");
GamePanel.stunden7.setText("");
GamePanel.stunden8.setText("");
}
}
}
Solution
So yes, put the JTextField and JButton in their own JPanel in a BoxLayout using JPanel, that is fine, and place that JPanel in the BorderLayout.PAGE_START position of a JPanel that uses BorderLayout with the rest of the GUI below it. For example:
import java.awt.BorderLayout;
import java.awt.Dimension;
import java.awt.event.KeyEvent;
import javax.swing.*;
public class Main2b {
public static void main(String[] args) {
SwingUtilities.invokeLater(() -> {
GamePanel2 mainPanel = new GamePanel2();
JFrame frame = new JFrame("GUI");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.add(mainPanel);
frame.pack();
frame.setLocationRelativeTo(null);
frame.setVisible(true);
});
}
}
@SuppressWarnings("serial")
class GamePanel2 extends JPanel {
private JTextField field = new JTextField(10);
private JButton knopf = new JButton("klick");
public GamePanel2() {
knopf.setMnemonic(KeyEvent.VK_K);
JPanel topPanel = new JPanel();
topPanel.setLayout(new BoxLayout(topPanel, BoxLayout.LINE_AXIS));
topPanel.add(field);
topPanel.add(knopf);
setLayout(new BorderLayout());
add(topPanel, BorderLayout.PAGE_START);
add(Box.createRigidArea(new Dimension(650, 400)));
}
}
displays as
Other unrelated issues:
- Avoid static variables unless there is a distinct need to use them (that isn't the case here) such as constants of a class or fields that must be part of the class, not the instance.
- Use arrays or ArrayLists to reduce code repetition. This will make your code much easier to debug and enhance.
- Also, you can give your JTextField an ActionListener, the same as the button, and it will be triggered when enter is pressed and the text field has focus.
- If the user should only type in the days of the week and nothing else, then don't use a JTextField for this where the user can type in anything. Instead, use a JComboBox where they can only choose the Strings that you offer to them.
For example:
@SuppressWarnings("serial")
class GamePanel2 extends JPanel {
public static final String[] TAG_DER_WOCH = { "Montag", "Dienstag", "Mittwoch", "Donnerstag", "Freitag", "Samstag",
"Sonntag" };
private JComboBox<String> tagDerWochCombo = new JComboBox<>(TAG_DER_WOCH);
// private JTextField field = new JTextField(10);
// private JButton knopf = new JButton("klick");
public GamePanel2() {
tagDerWochCombo.setSelectedIndex(-1);
// knopf.setMnemonic(KeyEvent.VK_K);
tagDerWochCombo.addActionListener(e -> {
System.out.println(tagDerWochCombo.getSelectedItem());
});
JPanel topPanel = new JPanel();
topPanel.setLayout(new BoxLayout(topPanel, BoxLayout.LINE_AXIS));
topPanel.add(tagDerWochCombo);
// topPanel.add(knopf);
setLayout(new BorderLayout());
add(topPanel, BorderLayout.PAGE_START);
add(Box.createRigidArea(new Dimension(650, 400)));
}
}
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