Java/Swing - Comment accéder JTextArea d'une autre classe

Question

Je veux afficher dans mon JTextArea (ConsoleTxt) tous les Printlns de mon autre classe. Je l'ai déjà mis une référence de classe GUI dans l'autre classe, mais cette erreur apparaît: Exception dans le thread "AWT-EventQueue-0" java.lang.NullPointerException »

Il est mon code GUI:

package Execucao; 

import static java.lang.Thread.sleep; 
import java.util.ArrayList; 
import javax.swing.JLabel; 
import javax.swing.JTextArea; 
import javax.swing.table.DefaultTableCellRenderer; 
import javax.swing.table.DefaultTableModel; 


public class Interface extends javax.swing.JFrame { 

int pc = 0, opCode, op1, op2, rx, ry; 
String iR; 
int endereço = 0; 
ArrayList<String> mem = new ArrayList<String>(); 


MemoryTable mCard = new MemoryTable(); 
UnidadeBusca b = new UnidadeBusca(); 
Decodificador dec = new Decodificador(); 
Registradores r = new Registradores(); 
Ula ula = new Ula(); 
MovimentoDados dFluxo = new MovimentoDados(); 
/** 
* Creates new form Interface 
*/ 

public Interface(JTextArea ConsoleTxt) { 
    this.ConsoleTxt = ConsoleTxt; 
} 

public Interface() {   

    this.endereço = endereço; 
    initComponents(); 
    Op1Txt.setDocument(new LimDigit(6)); 
    Op2Txt.setDocument(new LimDigit(6)); 



public int executar() { 
    append("Memória:"); 
    for(int i = 0; i < mem.size(); i++) {    
     String palavra = mem.get(i); 
     append("|"+ palavra + "|"); 
    } 

    while (pc < mem.size()){ 

     append("\nIniciando busca..."); 
     b.buscar(pc, mem);   
     iR = b.getiR(); 
     append("\nA palavra de endereço "+ pc +" é: "+ iR+"."); 

     append("\nDecodificando palavra..."); 
     dec.decodificar(pc, iR); 

     opCode = dec.getOperacao(); 
     op1 = dec.getOp1(); 
     op2 = dec.getOp2(); 

     append("\nCarregando valor do Operando 1 em Rx..."); 
     r.armazenarDado(op1);   
     rx = r.getRx(); 
     if (dec.decodId() == 0){ 
      append("\nCarregando valor do Operando 2 em Ry..."); 
      r.armazenarDado(op2); 
      ry = r.getRy(); 
      append("\nExecutando Instrução..."); 
      ula.executarOp(opCode, rx, ry); 
      dFluxo.executarOp(opCode, rx, ry); 
     } 
     else{ 
      append("\nExecutando Instrução..."); 
    ula.executarOp(opCode, rx, op2); 
    dFluxo.executarOp(opCode, rx, op2); 
     } 

     r.zerarBanco(); 
     if (opCode == 6) 
      pc = dFluxo.getPc(); 
     else 
    pc++; 
} 
    return 0; 
} 


private void jBAdicionarActionPerformed(java.awt.event.ActionEvent evt) {            
    String OpCod = OpCodeTxt.getText(); 
    String Op1 = Op1Txt.getText(); 
    String OpId = Op2IdTxt.getText(); 
    String Op2 = Op2Txt.getText(); 
    String palavra = OpCod.concat(Op1).concat(OpId).concat(Op2); 
    Object[] linha = {endereço, palavra}; 


    DefaultTableModel model = (DefaultTableModel) jTMemoria.getModel(); 

    endereço++; 
    mem.add(palavra); 
    model.addRow(linha); 
}           

private void jRNotActionPerformed(java.awt.event.ActionEvent evt) {          
    if (jRNot.isSelected()) 
     OpCodeTxt.setText("000"); 
}          

private void jRAndActionPerformed(java.awt.event.ActionEvent evt) {          
    if (jRAnd.isSelected()) 
     OpCodeTxt.setText("001"); 
}          

private void jRAddActionPerformed(java.awt.event.ActionEvent evt) {          
    if (jRAdd.isSelected()) 
     OpCodeTxt.setText("010"); 
}          

private void jRSubActionPerformed(java.awt.event.ActionEvent evt) {          
    if (jRSub.isSelected()) 
     OpCodeTxt.setText("011"); 
}          

private void jRMovActionPerformed(java.awt.event.ActionEvent evt) {          
    if (jRMov.isSelected()) 
     OpCodeTxt.setText("100"); 
}          

private void jRJmpActionPerformed(java.awt.event.ActionEvent evt) {          
    if (jRJmp.isSelected()) 
     OpCodeTxt.setText("101"); 
}          

private void OpCodeTxtActionPerformed(java.awt.event.ActionEvent evt) {           
    // TODO add your handling code here: 
}           

private void Op1TxtActionPerformed(java.awt.event.ActionEvent evt) {          

}          

private void jRHaltActionPerformed(java.awt.event.ActionEvent evt) {          
    if (jRHalt.isSelected()) 
     OpCodeTxt.setText("110"); 
}          

private void jBCompilarActionPerformed(java.awt.event.ActionEvent evt) {           
    executar(); 
}           

private void jRRegActionPerformed(java.awt.event.ActionEvent evt) {          
    if (jRReg.isSelected()) 
     Op2IdTxt.setText("0"); 
}          

private void jRImediatoActionPerformed(java.awt.event.ActionEvent evt) {           
    if (jRImediato.isSelected()) 
     Op2IdTxt.setText("1"); 
}           

public void append(String str){ 
    ConsoleTxt.append(str + "\n"); 
} 

private void bTesteActionPerformed(java.awt.event.ActionEvent evt) {          
    String address = Integer.toString(jTMemoria.getRowCount()); 
    ConsoleTxt.setText(""); 
}          

public void setEndereço(int endereço) { 
    this.endereço = endereço; 
} 

public int getEndereço() { 
    return endereço; 
} 

public void setConsoleTxt(JTextArea ConsoleTxt){ 
    this.ConsoleTxt = ConsoleTxt; 
} 

public JTextArea getConsoleTxt(){ 
    return ConsoleTxt; 
} 

/** 
* @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 ex) { 
     java.util.logging.Logger.getLogger(Interface.class.getName()).log(java.util.logging.Level.SEVERE, null, ex); 
    } catch (InstantiationException ex) { 
     java.util.logging.Logger.getLogger(Interface.class.getName()).log(java.util.logging.Level.SEVERE, null, ex); 
    } catch (IllegalAccessException ex) { 
     java.util.logging.Logger.getLogger(Interface.class.getName()).log(java.util.logging.Level.SEVERE, null, ex); 
    } catch (javax.swing.UnsupportedLookAndFeelException ex) { 
     java.util.logging.Logger.getLogger(Interface.class.getName()).log(java.util.logging.Level.SEVERE, null, ex); 
    } 
    //</editor-fold> 

    /* Create and display the form */ 
    java.awt.EventQueue.invokeLater(new Runnable() { 
     public void run() { 
      Interface gui = new Interface(); 
      new Interface().setVisible(true); 
     } 
    }); 
} 

// Variables declaration - do not modify      
private javax.swing.JTextArea ConsoleTxt; 
private javax.swing.JTextField Op1Txt; 
private javax.swing.JTextField Op2IdTxt; 
private javax.swing.JTextField Op2Txt; 
private javax.swing.JTextField OpCodeTxt; 
private javax.swing.JButton bTeste; 
private javax.swing.ButtonGroup buttonGroup1; 
private javax.swing.ButtonGroup buttonGroup2; 
private javax.swing.JButton jBAdicionar; 
private javax.swing.JButton jBCompilar; 
private javax.swing.JButton jBRemove; 
private javax.swing.JLabel jLabel1; 
private javax.swing.JLabel jLabel2; 
private javax.swing.JLabel jLabel3; 
private javax.swing.JLabel jLabel4; 
private javax.swing.JLabel jLabel5; 
private javax.swing.JMenu jMenu1; 
private javax.swing.JMenuBar jMenuBar1; 
private javax.swing.JPanel jPanel1; 
private javax.swing.JRadioButton jRAdd; 
private javax.swing.JRadioButton jRAnd; 
private javax.swing.JRadioButton jRHalt; 
private javax.swing.JRadioButton jRImediato; 
private javax.swing.JRadioButton jRJmp; 
private javax.swing.JRadioButton jRMov; 
private javax.swing.JRadioButton jRNot; 
private javax.swing.JRadioButton jRReg; 
private javax.swing.JRadioButton jRSub; 
private javax.swing.JScrollPane jScrollPane1; 
private javax.swing.JScrollPane jScrollPane2; 
private javax.swing.JTable jTMemoria; 
// End of variables declaration     

}

Et il est de mon code de classe:

package Execucao; 

import java.util.Scanner; 
import javax.swing.JTextArea; 

public class Decodificador { 
    Scanner enter = new Scanner(System.in); 

private int maskInst, maskRM, maskOp1, maskOp2, operacao, op1, op2, idOp2, opId, tipOp2, imediato, numDec; 
String X, Y, TipOp2; 

    private Interface w; 

public Decodificador() 
{} 

public Decodificador (int op1, int op2, int idOp2, int operacao, int opId, int numDec, Interface gui) { 
    this.op1 = op1; 
    this.op2 = op2; 
    this.idOp2 = idOp2; 
    this.operacao = operacao; 
    this.opId = opId; 
    this.numDec = numDec; 
      w = gui; 
    } 

public int decodId() { 

    idOp2 = ((numDec & maskRM) >> 6); 

    switch(idOp2) { 
    case 0: 
     TipOp2 = "ry"; 
     tipOp2 = 0; 
     break; 
    case 1: imediato = op2; 
     TipOp2 = "imediato"; 
     tipOp2 = 1; 
     break; 
    } 
    return tipOp2; 
} 


public int decodificar(int pc, String iR){ 
    numDec = 0; 
    int j; 
    int k = 0; 

    for(j = 15; j >= 0; j--) { 
     if (iR.charAt(j) == '1') 
      numDec += Math.pow(2, k); 
     k++; 
    } 
      System.out.println("Palavra "+(pc)+" convertida para decimal: "+ numDec + "."); 
      w.append("Palavra "+(pc)+" convertida para decimal: "+ numDec + "."); 

    maskInst = 0b1110000000000000; 
    maskRM = 0b0000000001000000; 
    maskOp1 = 0b0001111110000000; 
    maskOp2 = 0b0000000000111111; 


    operacao = ((numDec & maskInst) >> 13); 
    op1 = ((numDec & maskOp1) >> 7); 
    op2 = (numDec & maskOp2); 

    System.out.println("MASCARA DA OPERA��O:("+numDec+" & "+ maskInst +"): "+operacao+ "."); 
    System.out.println("MASCARA DO OPERANDO 1:("+numDec+" & "+ maskOp1 +"): "+op1+ "."); 
    System.out.println("MASCARA DO OPERANDO 2:("+numDec+" & "+ maskOp2 +"): "+op2+ "."); 


    switch(operacao){ 
     case 0: 
      X = "lógica"; 
      Y = "NOT"; 
      break; 
     case 1: 
      X = "lógica"; 
      Y = "AND"; 
      break; 
     case 2: 
      X = "aritmética"; 
      Y = "ADD"; 
      break; 
     case 3: 
      X = "aritmética"; 
      Y = "SUB"; 
      break; 
     case 4: 
      X = "de desvio de fluxo"; 
      Y = "MOV"; 
      break; 
     case 5: 
      X = "de desvio de fluxo"; 
      Y = "JMP"; 
      break; 
        case 6: 
          X = "de desvio de fluxo"; 
      Y = "HTL"; 
      break; 
    } 

    decodId(); 
    System.out.println("Operação "+ X + " " + Y +" com operando(s): " + op1 + "(rx) e " + op2 + "("+TipOp2+")."); 
    return 0; 
} 

public int getOperacao() { 
    return operacao; 
} 

public void setOperacao(int operacao) { 
    this.operacao = operacao; 
} 

public int getOp1() { 
    return op1; 
} 

public void setOp1(int op1) { 
    this.op1 = op1; 
} 

public int getOp2() { 
    return op2; 
} 

public void setOp2(int op2) { 
    this.op2 = op2; 
} 

public int getIdOp2() { 
    return idOp2; 
} 

public void setIdOp2(int idOp2) { 
    this.idOp2 = idOp2; 
} 

public int getNumDec() { 
    return numDec; 
} 

public void setNumDec(int numDec) { 
    this.numDec = numDec; 
} 

public int getOpId() { 
    return opId; 
} 

public void setOpId(int opId) { 
    this.opId = opId; 
} 

erreur:

Exception in thread "AWT-EventQueue-0" java.lang.NullPointerException 
at Execucao.Decodificador.decodificar(Decodificador.java:56) 
at Execucao.Interface.executar(Interface.java:80) 
at Execucao.Interface.jBCompilarActionPerformed(Interface.java:531) 
at Execucao.Interface.access$1300(Interface.java:19) 
at Execucao.Interface$15.actionPerformed(Interface.java:411) 
at javax.swing.AbstractButton.fireActionPerformed(AbstractButton.java:2022) 
at javax.swing.AbstractButton$Handler.actionPerformed(AbstractButton.java:2348) 
at javax.swing.DefaultButtonModel.fireActionPerformed(DefaultButtonModel.java:402) 
at javax.swing.DefaultButtonModel.setPressed(DefaultButtonModel.java:259) 
at javax.swing.plaf.basic.BasicButtonListener.mouseReleased(BasicButtonListener.java:252) 
at java.awt.Component.processMouseEvent(Component.java:6535) 
at javax.swing.JComponent.processMouseEvent(JComponent.java:3324) 
at java.awt.Component.processEvent(Component.java:6300) 
at java.awt.Container.processEvent(Container.java:2236) 
at java.awt.Component.dispatchEventImpl(Component.java:4891) 
at java.awt.Container.dispatchEventImpl(Container.java:2294) 
at java.awt.Component.dispatchEvent(Component.java:4713) 
at java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:4888) 
at java.awt.LightweightDispatcher.processMouseEvent(Container.java:4525) 
at java.awt.LightweightDispatcher.dispatchEvent(Container.java:4466) 
at java.awt.Container.dispatchEventImpl(Container.java:2280) 
at java.awt.Window.dispatchEventImpl(Window.java:2750) 
at java.awt.Component.dispatchEvent(Component.java:4713) 
at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:758) 
at java.awt.EventQueue.access$500(EventQueue.java:97) 
at java.awt.EventQueue$3.run(EventQueue.java:709) 
at java.awt.EventQueue$3.run(EventQueue.java:703) 
at java.security.AccessController.doPrivileged(Native Method) 
at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:76) 
at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:86) 
at java.awt.EventQueue$4.run(EventQueue.java:731) 
at java.awt.EventQueue$4.run(EventQueue.java:729) 
at java.security.AccessController.doPrivileged(Native Method) 
at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:76) 
at java.awt.EventQueue.dispatchEvent(EventQueue.java:728) 
at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:201) 
at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:116) 
at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:105) 
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:101) 
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:93) 
at java.awt.EventDispatchThread.run(EventDispatchThread.java:82) 

Pourriez-vous, s'il vous plaît, m'a aider?

Answer 1

rapide et sale comme l'a demandé:

public class TextFieldTest { 
    static class Dto { 
     private final SimpleStringProperty someStringProperty = new SimpleStringProperty(); 

     public SimpleStringProperty someStringProperty() { 
      return someStringProperty; 
     } 

    } 

    static class StringProvider { 
     private final Dto dto; 

     public StringProvider(Dto dto) { 
      this.dto = dto; 
     } 

     public void requestInput() { 
      JTextField jTextField = new JTextField(); 
      JOptionPane.showMessageDialog(null, jTextField); 
      dto.someStringProperty().set(jTextField.getText()); 
     } 
    } 

    static class StringConsumer { 
     private final Dto dto; 

     public StringConsumer(Dto dto) { 
      this.dto = dto; 
      dto.someStringProperty 
        .addListener((ChangeListener<String>) (arg0, arg1, newString) -> System.out.println(newString)); 
     } 

     @Override 
     public String toString() { 
      return "StringConsumer [string=" 
        + dto.someStringProperty.get() 
        + "]"; 
     } 
    } 

    public static void main(String[] args) { 
     Dto theModel = new Dto(); 
     StringConsumer stringConsumer = new StringConsumer(theModel); 
     System.out.println(stringConsumer.toString()); 

     StringProvider stringProvider = new StringProvider(theModel); 
     stringProvider.requestInput(); 
     System.out.println(stringConsumer.toString()); 
    } 
}