JTextArea不动态更新 [英] JTextArea not updating dynamically

问题描述

我想在动态更新的类中有一个JTextArea。目前它只显示我在完成所有处理后附加到它的文本。我试图实现以下内容来解决它：

I have a JTextArea inside a class that I want to update dynamically. Currently it is only displaying the text I append to it after all the processing is done. I have tried to implement the following to fix it:

public NewConsole(){
     initComponents();
 }

public void write(final String s){
        SwingUtilities.invokeLater(new Runnable() {
             public void run() {
                textarea.append(s);
             }
          });
    }

控制台在父类中实例化为：

Console gets instantiated in a parent class as:

protected NewConsole console = new NewConsole();

并输出到所有孩子的电话：

and to output to it, all the children call:

console.write("Append this..");

编辑：这里有更多信息：

Here's some more information:

public abstract class Parent{
     protected NewConsole console = new NewConsole();

     public Parent(){}

     protected abstract int doSomething();
}

public class Child extends Parent{

     public Child(){
          console.write("I want this to update dynamically");
          doSomething();
          console.write("And this..");
     }     

     public int doSomething(){
          //Quite intensive processing here
     }
}

推荐答案

在 doSomething 中进行的密集处理阻止了 EDT ，阻止了UI更新。请改用 SwingWorker 来执行此功能。

The intensive processing done in doSomething is blocking the EDT, preventing UI updates. Use a SwingWorker instead to perform this functionality.

使用执行以启动工作人员。将任何所需的调用移动到 console.write 到 doInBackground 或已完成。

Use execute to start the worker. Move any required calls to console.write to either doInBackground or done.

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