Question

我一直在尝试修复我的.setText崩溃问题，当我随机按下num0按钮时会发生这种情况。

但似乎我只能通过使用来解决它 new Thread(new Runnable() { __overwrite__swing__textfields___ });但在这种情况下我无法访问JTextField。

因此我编写了一个RunnableOutput类来发送和申请但是t 帽子也失败了。例如：

RunnableOutput.java

package ui;

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

/**
 * JTextField - Wrapper for thread-safe 
 * 
 * @author root
 */
public class RunnableOutput implements Runnable {
  private JTextField outputArea;
  private String messageToAppend;

  // initialze outputArea and message
  public RunnableOutput(JTextField output, String message) {
    outputArea = output;
    messageToAppend = message;
  }

  @Override
  public void run() {
    outputArea.setText(messageToAppend);
  }

}

Menu.java：

public static JTextField nameTextField0 = new JTextField(20);
public void IPpanel(JPanel configPanel) { 

  JPanel Numlock = new JPanel(new GridLayout(0,12));
  JButton num0 = new JButton("0"); 
  num0.addActionListener(new ActionListener() {
    @Override
    public void actionPerformed(ActionEvent ae) {

      // Fails: 
      // was expecting this should fixed it but indeed still not
      SwingUtilities.invokeLater(
        new RunnableOutput(nameTextField0, "Unit test: 0"));       

      // Fails: 
      // wont work few times works but when randomly i press the 
      // button it fails
      // Same result with: SwingUtilities.invokeAndWait();
      SwingUtilities.invokeLater(new Runnable() {
        public void run() {
          nameTextField0.setText("Unit test: 1");
        }
      });

      // Works: does not freez but does not change/apply the values
      new Thread(new Runnable() {
        Menu.nameTextField0.setText("Unit test: 2");
      });        

    }
  });
  Numlock.add(num0); 

  configPanel.setLayout(new GridLayout(0,1));
  configPanel.add(Numlock);

}

跟进：