Java

/*
* Click nbfs://nbhost/SystemFileSystem/Templates/Licenses/license-default.txt to change this license
* Click nbfs://nbhost/SystemFileSystem/Templates/GUIForms/JFrame.java to edit this template
*/
package cursoemvideo.olamundo;

/**
*
* @author Ariel
*/
public class OlaMundoJava extends javax.swing.JFrame {

/**
* Creates new form OlaMundoJava
*/
public OlaMundoJava() {
initComponents();
}

/**
* This method is called from within the constructor to initialize the form.
* WARNING: Do NOT modify this code. The content of this method is always
* regenerated by the Form Editor.
*/
@SuppressWarnings(“unchecked”)
// <editor-fold defaultstate=”collapsed” desc=”Generated Code”>
private void initComponents() {

lblMensagem = new javax.swing.JLabel();
btnClick = new javax.swing.JButton();

setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);

lblMensagem.setBackground(new java.awt.Color(255, 51, 0));
lblMensagem.setFont(new java.awt.Font(“Dialog”, 0, 14)); // NOI18N
lblMensagem.setForeground(new java.awt.Color(255, 51, 0));
lblMensagem.setText(“Aqui vai aparecer a mensagem!”);

btnClick.setFont(new java.awt.Font(“Dialog”, 0, 14)); // NOI18N
btnClick.setForeground(new java.awt.Color(255, 255, 0));
btnClick.setText(“Clique em mim!”);

javax.swing.GroupLayout layout = new javax.swing.GroupLayout(getContentPane());
getContentPane().setLayout(layout);
layout.setHorizontalGroup(
layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(layout.createSequentialGroup()
.addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(layout.createSequentialGroup()
.addGap(72, 72, 72)
.addComponent(lblMensagem))
.addGroup(layout.createSequentialGroup()
.addGap(112, 112, 112)
.addComponent(btnClick)))
.addContainerGap(82, Short.MAX_VALUE))
);
layout.setVerticalGroup(
layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(layout.createSequentialGroup()
.addGap(90, 90, 90)
.addComponent(lblMensagem)
.addGap(18, 18, 18)
.addComponent(btnClick, javax.swing.GroupLayout.PREFERRED_SIZE, 41, javax.swing.GroupLayout.PREFERRED_SIZE)
.addContainerGap(72, Short.MAX_VALUE))
);

pack();
}// </editor-fold>

/**
* @param args the command line arguments
*/
public static void main(String args[]) {
/* Set the Nimbus look and feel */
//<editor-fold defaultstate=”collapsed” desc=” Look and feel setting code (optional) “>
/* If Nimbus (introduced in Java SE 6) is not available, stay with the default look and feel.
* For details see http://download.oracle.com/javase/tutorial/uiswing/lookandfeel/plaf.html
*/
try {
for (javax.swing.UIManager.LookAndFeelInfo info : javax.swing.UIManager.getInstalledLookAndFeels()) {
if (“Nimbus”.equals(info.getName())) {
javax.swing.UIManager.setLookAndFeel(info.getClassName());
break;
}
}
} catch (ClassNotFoundException | InstantiationException | IllegalAccessException | javax.swing.UnsupportedLookAndFeelException ex) {
java.util.logging.Logger.getLogger(OlaMundoJava.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
}
//</editor-fold>

//</editor-fold>

/* Create and display the form */
java.awt.EventQueue.invokeLater(() -> {
new OlaMundoJava().setVisible(true);
});
}

// Variables declaration – do not modify
private javax.swing.JButton btnClick;
private javax.swing.JLabel lblMensagem;
// End of variables declaration
}

• Esta resposta foi modificada 10 meses, 2 semanas atrás por Ariel Araújo. Razão: Tinha alguns codigos escondidos

Estou na aula 5, introdução ao javafx e swing

Ja consegui resolver meu problema, muito obrigado