JFrame Background Image does not work

Question

I searched for a way to add an Image as an Bakground for my JFrame. I found some Questions for that and tried several solutions but my Image won't show up and I don't know what's wrong (I'm a noob btw xd) I DID see the other Questions but they DID NOT help me, I tried really hard but can't find my fault! So please (Human who marked my post as duplicate).

import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import javax.swing.event.*;


public class prognose extends Frame {
  // Anfang Attribute
  private JTextField spendenbetrag = new JTextField();
  private JTextField streamzeit = new JTextField();
  private JLabel sBetragL = new JLabel();
  private JLabel sZeitL = new JLabel();
  private JButton prognosebutton = new JButton();
  private ImageIcon prognosebuttonIcon = new ImageIcon("C:\\Users\\user\\Documents\\Programmieren\\Workspace\\images\\Button.png");
  private JTextField ergebnis = new JTextField();
  // Ende Attribute

  public prognose() { 
    // Frame-Initialisierung
    super();
    addWindowListener(new WindowAdapter() {
      public void windowClosing(WindowEvent evt) { dispose(); }
    });
    int frameWidth = 455; 
    int frameHeight = 580;
    setSize(frameWidth, frameHeight);
    Dimension d = Toolkit.getDefaultToolkit().getScreenSize();
    int x = (d.width - getSize().width) / 2;
    int y = (d.height - getSize().height) / 2;
    setLocation(x, y);
    setTitle("Loot für die Welt");
    setResizable(false);
    Panel cp = new Panel(null);
    add(cp);

    // Anfang Komponenten

    spendenbetrag.setText("");
    cp.add(spendenbetrag);
    streamzeit.setText("");
    cp.add(streamzeit);
    sBetragL.setText("Aktueller Spendenbetrag");
    cp.add(sBetragL);
    streamzeit.setBounds(152, 184, 145, 25);
    spendenbetrag.setBounds(152, 112, 145, 25);
    sBetragL.setBounds(152, 80, 145, 25);
    sZeitL.setBounds(152, 152, 155, 25);
    sZeitL.setText("Aktuelle Streamzeit");
    cp.add(sZeitL);
    prognosebutton.setBounds(184, 224, 80, 280);
    prognosebutton.setText("");
    prognosebutton.setMargin(new Insets(2, 2, 2, 2));
    prognosebutton.addActionListener(new ActionListener() { 
      public void actionPerformed(ActionEvent evt) { 
        prognosebutton_ActionPerformed(evt);
      }
    });
    prognosebutton.setIcon(prognosebuttonIcon);
    prognosebutton.setBorderPainted(false);
    prognosebutton.setBackground(Color.WHITE);
    prognosebutton.setBorder(BorderFactory.createEtchedBorder(0, Color.DARK_GRAY, new Color(0xC0C0C0)));
    prognosebutton.setIconTextGap(0);
    cp.setBackground(Color.WHITE);
    setUndecorated(false);
    cp.add(prognosebutton);
    ergebnis.setBounds(152, 512, 145, 25);
    ergebnis.setText("");
    ergebnis.setEditable(false);
    cp.add(ergebnis);
    // Ende Komponenten

    setVisible(true);
    setLayout(new BorderLayout());
    setSize(455,580);
    setVisible(true);
    JLabel background=new JLabel(new ImageIcon("C:\\Users\\user\\Documents\\Programmieren\\Workspace\\images\\Background.png"));

    add(background);

    background.setLayout(new FlowLayout());


  } // end of public prognose

  // Anfang Methoden

  public static void main(String[] args) {
    new prognose(); 
  } // end of main

  public void prognosebutton_ActionPerformed(ActionEvent evt) {
    // TODO hier Quelltext einfügen
    String a;
    String b;
    a = spendenbetrag.getText();
    b = streamzeit.getText();
    double d;
    double e = Double.parseDouble(a);
    double f = Double.parseDouble(b);
    d = e*(60/f)*48;
    d = ((double)((int)(d*100)))/100;
    String g = String.valueOf(d);
    ergebnis.setText(g);
  } // end of prognosebutton_ActionPerformed

  // Ende Methoden
} // end of class prognose

http://stackoverflow.com/questions/18777893/jframe-background-image — javaDeveloper, Dec 14 '16 at 10:16
Yea I've seen that one and I've tried both ways but neither of them worked — Veronique, Dec 14 '16 at 10:20

javaDeveloper · Accepted Answer · 2016-12-14T11:58:30.600

Extend JFrame instead of Frame, use the setComponentPane to set the backround, Move the declaration of the background label to the top of the code. Add all the components to that label.

import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import javax.swing.event.*;


public class prognose extends JFrame {
  // Anfang Attribute
  private JTextField spendenbetrag = new JTextField();
  private JTextField streamzeit = new JTextField();
  private JLabel sBetragL = new JLabel();
  private JLabel sZeitL = new JLabel();
  private JButton prognosebutton = new JButton();
  private ImageIcon prognosebuttonIcon = new ImageIcon("C:\\test\\rak.png");
  private JTextField ergebnis = new JTextField();
  // Ende Attribute

  public prognose() { 
    // Frame-Initialisierung
    super();
    addWindowListener(new WindowAdapter() {
      public void windowClosing(WindowEvent evt) { dispose(); }
    });
    int frameWidth = 455; 
    int frameHeight = 580;
    setSize(frameWidth, frameHeight);
    Dimension d = Toolkit.getDefaultToolkit().getScreenSize();
    int x = (d.width - getSize().width) / 2;
    int y = (d.height - getSize().height) / 2;
    setLocation(x, y);
    setTitle("Loot für die Welt");
    setResizable(false);
    JLabel background=new JLabel(new ImageIcon("C:\\test\\rak.png"));

    setContentPane(background);
    background.setLayout(new FlowLayout());
    Panel cp = new Panel(null);
    background.add(cp);

    // Anfang Komponenten

    spendenbetrag.setText("");
    background.add(spendenbetrag);
    streamzeit.setText("");
    background.add(streamzeit);
    sBetragL.setText("Aktueller Spendenbetrag");
    background.add(sBetragL);
    streamzeit.setBounds(152, 184, 145, 25);
    spendenbetrag.setBounds(152, 112, 145, 25);
    sBetragL.setBounds(152, 80, 145, 25);
    sZeitL.setBounds(152, 152, 155, 25);
    sZeitL.setText("Aktuelle Streamzeit");
    background.add(sZeitL);
    prognosebutton.setBounds(184, 224, 80, 280);
    prognosebutton.setText("");
    prognosebutton.setMargin(new Insets(2, 2, 2, 2));
    prognosebutton.addActionListener(new ActionListener() { 
      public void actionPerformed(ActionEvent evt) { 
        prognosebutton_ActionPerformed(evt);
      }
    });
    prognosebutton.setIcon(prognosebuttonIcon);
    prognosebutton.setBorderPainted(false);
    prognosebutton.setBackground(Color.WHITE);
    prognosebutton.setBorder(BorderFactory.createEtchedBorder(0, Color.DARK_GRAY, new Color(0xC0C0C0)));
    prognosebutton.setIconTextGap(0);
    background.setBackground(Color.WHITE);
    setUndecorated(false);
    background.add(prognosebutton);
    ergebnis.setBounds(152, 512, 145, 25);
    ergebnis.setText("");
    ergebnis.setEditable(false);
    background.add(ergebnis);
    // Ende Komponenten

    setVisible(true);
    setLayout(new BorderLayout());
    setSize(455,580);
    setVisible(true);




  } // end of public prognose

  // Anfang Methoden

  public static void main(String[] args) {
    new prognose(); 
  } // end of main

  public void prognosebutton_ActionPerformed(ActionEvent evt) {
    // TODO hier Quelltext einfügen
    String a;
    String b;
    a = spendenbetrag.getText();
    b = streamzeit.getText();
    double d;
    double e = Double.parseDouble(a);
    double f = Double.parseDouble(b);
    d = e*(60/f)*48;
    d = ((double)((int)(d*100)))/100;
    String g = String.valueOf(d);
    ergebnis.setText(g);
  } // end of prognosebutton_ActionPerformed

  // Ende Methoden
} // end of class prognose

It seems like it does not know setComponentPane, I get this Error : *Exception in thread "main" java.lang.Error: Unresolved compilation problem: The method setComponentPane(JLabel) is undefined for the type prognose at prognose.(prognose.java:36) at prognose.main(prognose.java:95)* — Veronique, Dec 14 '16 at 11:23
Now I got the Background and my Buttons, Textfields etc. are shown, but they aren't where they belong, they are stacked on the upper side of the area — Veronique, Dec 14 '16 at 14:14

JFrame Background Image does not work

1 Answers1