Add image to . jar

Question

I have several programs that run perfectly on my machine, the .jar runs smoothly and I use them as well as I wish, no problem. However, when I run them on another machine, images do not appear. The program runs perfectly, everything as it should be, but the images just don’t appear.

Here’s one of the programs I’d like you to run, a calculator. I’ve changed the icon of JOpTionPane.showMessageDialog, that is in the menu, and the icon does not appear.

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

public class Calculadora extends JFrame {
    private static final long serialVersionUID = 1L;

private JButton n1;
private JButton n2;
private JButton n3;
private JButton n4;
private JButton n5;
private JButton n6;
private JButton n7;
private JButton n8;
private JButton n9;
private JButton n0;
private JButton botaoMais;
private JButton botaoMenos;
private JButton botaoVezes;
private JButton botaoDividi;
private JButton botaoIgual;
private JButton botaoC;
private JButton botaoCE;
private JButton botaoPonto;
private char operacao;
private int inteiro;
private int decimal;
private double memoria;
private boolean ponto;
private JLabel creditos;
private JTextField campo;

public Calculadora(){
    setTitle("Calculadora do Ozzy");
    setBounds(0,0,280,400);
    setDefaultCloseOperation(EXIT_ON_CLOSE);
    setResizable(false);
    getContentPane().setBackground(new Color(190,194,233));
    setLayout(null);

    JMenuBar mBar = new JMenuBar();

    JMenu opcoes = new JMenu("Opções");
    JMenuItem sobreCalc = new JMenuItem("Sobre");
    JMenuItem sobreMim = new JMenuItem("Sobre mim");

    opcoes.add(sobreCalc);
    opcoes.add(sobreMim);

    JMenu sair = new JMenu("Sair");
    JMenuItem exit = new JMenuItem ("Sair");

    sair.add(exit);

    mBar.add(opcoes);
    mBar.add(sair);
    setJMenuBar(mBar);

    inteiro = 0;
    decimal = 0;
    memoria = 0;

    n1 = new JButton ();
    n1.setText("1");
    n1.setBounds(25,115,45,45);
    n1.setBackground(new Color(134,142,215));
    n1.setForeground(Color.white);
    this.add(n1);

    n2 = new JButton ();
    n2.setText("2");
    n2.setBounds(85,115,45,45);
    n2.setBackground(new Color(134,142,215));
    n2.setForeground(Color.white);
    this.add(n2);

    n3 = new JButton();
    n3.setText("3");
    n3.setBounds(140,115,45,45);
    n3.setBackground(new Color(134,142,215));
    n3.setForeground(Color.white);
    this.add(n3);

    n4 = new JButton();
    n4.setText ("4");
    n4.setBounds (25,170,45,45);
    n4.setBackground(new Color(134,142,215));
    n4.setForeground(Color.white);
    this.add(n4);

    n5 = new JButton ();
    n5.setText("5");
    n5.setBounds(85,170,45,45);
    n5.setBackground(new Color(134,142,215));
    n5.setForeground(Color.white);
    this.add (n5);

    n6 = new JButton();
    n6.setText("6");
    n6.setBounds(140,170,45,45);
    n6.setBackground(new Color(134,142,215));
    n6.setForeground(Color.white);
    this.add(n6);

    n7 = new JButton ();
    n7.setText("7");
    n7.setBounds(25,225,45,45);
    n7.setBackground(new Color(134,142,215));
    n7.setForeground(Color.white);
    this.add(n7);

    n8 = new JButton();
    n8.setText("8");
    n8.setBounds (85,225,45,45);
    n8.setBackground(new Color(134,142,215));
    n8.setForeground(Color.white);
    this.add (n8);

    n9 = new JButton ();
    n9.setText("9");
    n9.setBounds (140,225,45,45);
    n9.setBackground(new Color(134,142,215));
    n9.setForeground(Color.white);
    this.add (n9);

    n0 = new JButton();
    n0.setText ("0");
    n0.setBounds (140,280,45,45);
    n0.setBackground(new Color(134,142,215));
    n0.setForeground(Color.white);
    this.add (n0);

    botaoMais = new JButton();
    botaoMais.setText("+");
    botaoMais.setBounds(195,115,45,45);
    botaoMais.setBackground(new Color(133,197,235));
    botaoMais.setForeground(Color.white);
    this.add(botaoMais);

    botaoMenos = new JButton ();
    botaoMenos.setText ("-");
    botaoMenos.setBounds(195,170,45,45);
    botaoMenos.setBackground(new Color(133,197,235));
    botaoMenos.setForeground(Color.white);
    this.add (botaoMenos);

    botaoVezes = new JButton();
    botaoVezes.setText ("x");
    botaoVezes.setBounds(195,225,45,45);
    botaoVezes.setBackground(new Color(133,197,235));
    botaoVezes.setForeground(Color.white);
    this.add(botaoVezes);

    botaoDividi = new JButton();
    botaoDividi.setText("÷");
    botaoDividi.setBounds(195,280,45,45);
    botaoDividi.setBackground(new Color(133,197,235));
    botaoDividi.setForeground(Color.white);
    this.add(botaoDividi);

    botaoIgual = new JButton();
    botaoIgual.setText("=");
    botaoIgual.setBounds(25,280,45,45);
    botaoIgual.setBackground(new Color(133,197,235));
    botaoIgual.setForeground(Color.white);
    this.add(botaoIgual);

    botaoPonto = new JButton ();
    botaoPonto.setText(".");
    botaoPonto.setBounds(85,280,45,45);
    botaoPonto.setBackground(new Color(133,197,235));
    botaoPonto.setForeground(Color.white);
    this.add (botaoPonto);

    botaoC = new JButton ();
    botaoC.setText("C");
    botaoC.setBounds(25,65,105,40);
    botaoC.setBackground(new Color (157,182,210));
    botaoC.setForeground(Color.white);
    this.add(botaoC);

    botaoCE = new JButton ();
    botaoCE.setText("CE");
    botaoCE.setBounds(140,65,100,40);
    botaoCE.setBackground(new Color(157,182,210));
    botaoCE.setForeground(Color.white);
    this.add(botaoCE);

    campo = new JTextField();
    campo.setBounds(25,25,216,30);
    this.add(campo);

    creditos = new JLabel();
    creditos.setBounds(78,287,200,100);
    creditos.setText("Gabriel Ozzy Santos");
    this.add(creditos);

    n1.addActionListener(new ActionListener(){
        public void actionPerformed(ActionEvent evt){
            if(ponto){
                decimal +=1;
            } else{
            inteiro *= 10;
            inteiro +=1;

            }
            campo.setText(campo.getText()+ "1");
        }
    });
    n2.addActionListener(new ActionListener(){
        public void actionPerformed(ActionEvent evt){
            if (ponto){
                decimal +=2;
            }else{
            inteiro *=10;
            inteiro+= 2;

            }
            campo.setText (campo.getText()+"2");
        }
    });
    n3.addActionListener(new ActionListener(){
        public void actionPerformed(ActionEvent event){
            if (ponto){
                decimal+=3;
            }else {
            inteiro *= 10;
            inteiro += 3;
            }
            campo.setText(campo.getText()+"3");

        }
    });
    n4.addActionListener(new ActionListener(){
        public void actionPerformed(ActionEvent evt){
            if (ponto){
                decimal+=4;
            }else {
            inteiro *= 10;
            inteiro +=4;
            }
            campo.setText (campo.getText ()+"4");

        }
    });
    n5.addActionListener(new ActionListener(){
        public void actionPerformed (ActionEvent evt){
            if (ponto){
                decimal +=5;
            }else{
            inteiro*= 10;
            inteiro +=5;
            }
            campo.setText (campo.getText ()+ "5");
        }
    });
    n6.addActionListener (new ActionListener (){
        public void actionPerformed (ActionEvent evt){
            if (ponto){
                decimal +=6;
            }else {
            inteiro*= 10;
            inteiro +=6;
            }
            campo.setText (campo.getText ()+ "6");
        }
    });
    n7.addActionListener(new ActionListener(){
        public void actionPerformed (ActionEvent evt){
            if(ponto){
                decimal +=7;
            }else {
            inteiro*= 10;
            inteiro +=7;
            }
            campo.setText (campo.getText()+"7");
        }
    });
    n8.addActionListener(new ActionListener(){
        public void actionPerformed(ActionEvent evt){
            if(ponto){
                decimal +=8;
            }else{
            inteiro *=10;
            inteiro +=8;
            }
            campo.setText(campo.getText()+"8");
        }
    });
    n9.addActionListener (new ActionListener(){
        public void actionPerformed(ActionEvent evt){
            if (ponto){
                decimal +=9;
            }else{
            inteiro *=10;
            inteiro +=9;
            }
            campo.setText(campo.getText()+"9");

        }
    });
    n0.addActionListener(new ActionListener(){
        public void actionPerformed(ActionEvent evt){
            if(ponto){
                decimal +=0;
            }else{
            inteiro*=10;
            inteiro +=0;
            }
            campo.setText(campo.getText()+"0");
        }
    });
    botaoMais.addActionListener (new ActionListener(){
        public void actionPerformed(ActionEvent evt){
            double numero =Double.parseDouble(String.format("%s.%s",inteiro,decimal));

            String t1 = campo.getText();
            if(!"".equals(t1))
            numero = Double.parseDouble(t1);

            operacao = '+';
            if (memoria > 0){
                memoria += numero;
            }else{
                    memoria = numero;
                }
            inteiro = 0;
            numero = 0;
            decimal = 0;
            ponto = false;
            campo.setText("");
            }
        });
    botaoMenos.addActionListener (new ActionListener(){
        public void actionPerformed(ActionEvent evt){
            double numero = Double.parseDouble (String.format("%s.%s",inteiro,decimal));

            String t1 = campo.getText();
            if(!"".equals(t1))
            numero = Double.parseDouble(t1);

            operacao = '-';
            if (memoria > 0){
                memoria -= numero;
            }else {
                memoria = numero;
            }
            numero = 0;
            inteiro = 0;
            decimal = 0;
            ponto = false;
            campo.setText("");
        }
    });
    botaoVezes.addActionListener (new ActionListener(){
        public void actionPerformed(ActionEvent evt){
            double numero = Double.parseDouble (String.format("%s.%s",inteiro,decimal));

            String t1 = campo.getText();
            if(!"".equals(t1))
            numero = Double.parseDouble(t1);

            operacao = '*';
            if (memoria > 0){
                memoria *= numero;
            }else {
                memoria = numero;
            }
            numero = 0;
            inteiro =0;
            decimal =0;
            ponto = false;      
            campo.setText("");
        }
    });
    botaoDividi.addActionListener(new ActionListener(){
        public void actionPerformed (ActionEvent evt){
            double numero = Double.parseDouble(String.format("%s.%s",inteiro,decimal));

            String t1 = campo.getText();
            if(!"".equals(t1))
            numero = Double.parseDouble(t1);

            operacao = '/';
            if(memoria > 0){
                memoria /=numero;
            }else {
                memoria = numero;
            }
            numero=0;
            inteiro =0;
            decimal = 0;
            ponto = false;
            campo.setText("");
        }
    });
    botaoC.addActionListener (new ActionListener(){
        public void actionPerformed (ActionEvent evt){
            inteiro = 0;
            decimal = 0;
            memoria = 0;
            ponto = false;
            campo.setText("");
        }
    });
    botaoCE.addActionListener(new ActionListener(){
        public void actionPerformed (ActionEvent evt){
            inteiro = 0;
            decimal = 0;
            ponto = false;
            campo.setText("");
        }
    });
    botaoPonto.addActionListener(new ActionListener(){
        public void actionPerformed (ActionEvent evt){
            if (!ponto){
                campo.setText(inteiro +".");
                ponto = (true);
            }
        }
    });
    botaoIgual.addActionListener(new ActionListener(){
        public void actionPerformed(ActionEvent evt){
            double numero = Double.parseDouble(String.format("%s.%s", inteiro, decimal));

            String t1 = campo.getText();
            if(!"".equals(t1))
            numero = Double.parseDouble(t1);

            switch (operacao){
            case '+':{
                memoria += numero;
                break;
            }
            case '-':{
                memoria -=numero;
                break;
            }
            case '*':{
                memoria *=numero;
                break;
            }
            case '/':{
                memoria /=numero;
                break;
            }
            }
            numero = 0;
            campo.setText(""+ memoria);
        }
    });

    sobreCalc.addActionListener(new ActionListener(){
        public void actionPerformed(ActionEvent evt){
            Icon about = new ImageIcon("C:/Users/Gabriel Ozzy/Downloads/Java2.jpg");  
            JOptionPane.showMessageDialog(null,"Programado em Java 7 - Plataforma Eclipse", "Sobre o software",0,about);
        }
    });
    sobreMim.addActionListener(new ActionListener(){
        public void actionPerformed(ActionEvent evt){
            Icon about2 = new ImageIcon("C:/Users/Gabriel Ozzy/Downloads/Java2.jpg");
            JOptionPane.showMessageDialog(null,"Programador: Gabriel Ozzy Santos","Sobre o desenvolvedor",0,about2);
        }
    });
    exit.addActionListener(new ActionListener(){
        public void actionPerformed(ActionEvent evt){
                System.exit(0);
            }
        });
}

public static void main (String [] args){
    Calculadora cCalculadora = new Calculadora();
        cCalculadora.setVisible(true);
}
}

Here is the mistake:

Answer 1

I always put all the images I’ll use inside a new package, so when I generate one. I don’t have to worry about them because they’ll be inside.

I created a new package called Assets, and inside it I put the images I need and in another package I created a class to perform the image load test. According to the following structure:

How was the class that loads the images and I made a test if the image was loaded successfully.

You can use several ways to load the image, I used a simple as needed. And the console output indicating that the image was successfully loaded.

Answer 2

Create a . zip file with all your images and add in your Build Path.

Right-click your project folder > Build Path > Configure Build Path > Java Build Path > Libraries > Add Jars

Example:

To use the image in your code, for example do:

JLabel lblImg1 = new JLabel("");
JLabel lblImg2 = new JLabel("");
lblImg1.setIcon(new ImageIcon(Principal.class.getResource("/img1.png"))); 
lblImg2.setIcon(new ImageIcon(Principal.class.getResource("/img2.png"))); 

Use the name of the images that are inside your zip.

When exporting the jar it will automatically include your file . zip containing the images.

Answer 3

I don’t know if it’s been resolved, but I’ll answer it. When I use images in my projects I create a folder inside the project folder and do so:

Icon about = new ImageIcon("minhaPasta/Java2.jpg");

And when I use it on another machine I copy the jar and this folder. It always works.