How do I update the jTextArea ? I try to update it with the click of a button, but I can not. I want to add new texts along with the previous ones, but until then without success. I did the implementation on the terminal (System.out) and it worked normally, the problem is in making the text appear in jTextArea . What to do?
public class Tela extends javax.swing.JFrame {
/**
* Creates new form Tela
*/
public Tela() {
initComponents();
}
static int option;
static int acao,cont=0;
static String conteudo,str;
@SuppressWarnings("unchecked")
// <editor-fold defaultstate="collapsed" desc="Generated Code">
private void initComponents() {
jLabel2 = new javax.swing.JLabel();
jLabel1 = new javax.swing.JLabel();
lblValor = new javax.swing.JTextField();
jButton2 = new javax.swing.JButton();
jScrollPane2 = new javax.swing.JScrollPane();
text = new javax.swing.JTextArea();
setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);
setBackground(new java.awt.Color(1, 1, 1));
setResizable(false);
jLabel2.setHorizontalAlignment(javax.swing.SwingConstants.CENTER);
jLabel2.setIcon(new javax.swing.ImageIcon(getClass().getResource("/images/graphics-1658177_960_720.png"))); // NOI18N
jLabel1.setForeground(new java.awt.Color(5, 0, 0));
jLabel1.setText("O que deseja fazer(digite uma opção):)");
jLabel1.setToolTipText("");
lblValor.setForeground(new java.awt.Color(1, 1, 1));
lblValor.setHorizontalAlignment(javax.swing.JTextField.CENTER);
lblValor.setToolTipText("");
jButton2.setText("Confirmar");
jButton2.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
jButton2ActionPerformed(evt);
}
});
jScrollPane2.setHorizontalScrollBarPolicy(javax.swing.ScrollPaneConstants.HORIZONTAL_SCROLLBAR_NEVER);
jScrollPane2.setVerticalScrollBarPolicy(javax.swing.ScrollPaneConstants.VERTICAL_SCROLLBAR_ALWAYS);
jScrollPane2.setAutoscrolls(true);
text.setEditable(false);
text.setColumns(20);
text.setRows(5);
jScrollPane2.setViewportView(text);
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()
.addContainerGap()
.addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addComponent(jLabel2, javax.swing.GroupLayout.DEFAULT_SIZE, 712, Short.MAX_VALUE)
.addGroup(layout.createSequentialGroup()
.addComponent(jLabel1)
.addGap(0, 0, Short.MAX_VALUE))))
.addGroup(layout.createSequentialGroup()
.addGap(85, 85, 85)
.addComponent(lblValor, javax.swing.GroupLayout.PREFERRED_SIZE, 211, javax.swing.GroupLayout.PREFERRED_SIZE)
.addGap(95, 95, 95)
.addComponent(jButton2, javax.swing.GroupLayout.PREFERRED_SIZE, 192, javax.swing.GroupLayout.PREFERRED_SIZE)
.addGap(0, 0, Short.MAX_VALUE))
.addGroup(layout.createSequentialGroup()
.addContainerGap()
.addComponent(jScrollPane2)))
.addContainerGap())
);
layout.setVerticalGroup(
layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(layout.createSequentialGroup()
.addComponent(jLabel2, javax.swing.GroupLayout.PREFERRED_SIZE, 60, javax.swing.GroupLayout.PREFERRED_SIZE)
.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
.addComponent(jScrollPane2, javax.swing.GroupLayout.PREFERRED_SIZE, 205, javax.swing.GroupLayout.PREFERRED_SIZE)
.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
.addComponent(jLabel1)
.addGap(30, 30, 30)
.addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING, false)
.addComponent(jButton2, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
.addComponent(lblValor, javax.swing.GroupLayout.DEFAULT_SIZE, 44, Short.MAX_VALUE))
.addGap(0, 29, Short.MAX_VALUE))
);
pack();
}// </editor-fold>
private void jButton2ActionPerformed(java.awt.event.ActionEvent evt) {
option = Integer.parseInt(lblValor.getText());
cont+=1;
historia(option,cont);
}
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 ex) {
java.util.logging.Logger.getLogger(Tela.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
} catch (InstantiationException ex) {
java.util.logging.Logger.getLogger(Tela.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
} catch (IllegalAccessException ex) {
java.util.logging.Logger.getLogger(Tela.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
} catch (javax.swing.UnsupportedLookAndFeelException ex) {
java.util.logging.Logger.getLogger(Tela.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
}
//</editor-fold>
/* Create and display the form */
Tela t = new Tela();
java.awt.EventQueue.invokeLater(new Runnable() {
public void run() {
t.setVisible(true);
t.text.setText("Seja bem-vindo ao jogo que as suas decisões podem "
+ "matar ou salvar alguém...\nSó depende de você! Boa sorte!"
+ "Você está pronto?\n 1 - SIM\n 2 - NÃO\n\n");
}
});
}
public static void historia(int decisao,int cont){
Textos text = new Textos();
Tela t = new Tela();
if(cont == 1){
switch(decisao){
case 1:
str = "Você tomou essa decisão... A partir de agora tudo está por sua\n"
+ "conta em risco... Salve-se... A aventura começa agora...\n";
t.text.append(str);//não atualiza o texto
System.out.println(t.text.getText());
}
}
}
// Variables declaration - do not modify
private javax.swing.JButton jButton2;
private javax.swing.JLabel jLabel1;
private javax.swing.JLabel jLabel2;
private javax.swing.JScrollPane jScrollPane2;
private javax.swing.JTextField lblValor;
private javax.swing.JTextArea text;
// End of variables declaration
}