Java 线程停止、挂起和恢复_Java_Multithreading_Swing

Java 线程停止、挂起和恢复

java multithreading swing

Java 线程停止、挂起和恢复,java,multithreading,swing,Java,Multithreading,Swing,我正在编写一个包含JFrame和线程的代码。线程应该从文本字段中获取文本并将其写入文本区域。我有4个按钮，如下所示：开始启动线程。使线停止的停止。暂停，暂停并继续线程。和Exit，停止线程并退出程序。我在frame的构造函数中创建了线程并实现了run函数，如下所示： WritingThread = new Thread(new Runnable() { @Override public void run() { String s = WrittenT

我正在编写一个包含JFrame和线程的代码。线程应该从文本字段中获取文本并将其写入文本区域。我有4个按钮，如下所示：

开始启动线程。使线停止的停止。暂停，暂停并继续线程。和Exit，停止线程并退出程序。我在frame的构造函数中创建了线程并实现了run函数，如下所示：

WritingThread = new Thread(new Runnable() {
    @Override
    public void run() {
        String s = WrittenText.getText();
        while(true)
        {
            for(int i = 0; i < 4; i++)
            {
                for(int j = 0; j < s.length(); j++)
                {
                    WritingArea.append("" + s.charAt(j));
                    try {
                        Thread.sleep((int)ThreadSpeedSpinner.getValue());
                    } catch (InterruptedException e) {
                        e.printStackTrace();
                    }   
                }
                WritingArea.append("\n");
            }   
            WritingArea.setText("");
        }
    }
});

我出现了两个问题：

当我使用stop、suspend或resume时，会收到一条警告，指出类型Thread中的方法已弃用。当我运行程序时，我启动线程，然后停止它，然后尝试启动它。我有这个异常

Exception in thread "AWT-EventQueue-0" java.lang.IllegalThreadStateException
    at java.lang.Thread.start(Unknown Source)
    at com.HomeWork.HomeWork5$6.actionPerformed(HomeWork5.java:140)
    at javax.swing.AbstractButton.fireActionPerformed(Unknown Source)
    at javax.swing.AbstractButton$Handler.actionPerformed(Unknown Source)
    at javax.swing.DefaultButtonModel.fireActionPerformed(Unknown Source)
    at javax.swing.DefaultButtonModel.setPressed(Unknown Source)
    at javax.swing.plaf.basic.BasicButtonListener.mouseReleased(Unknown Source)
    at java.awt.Component.processMouseEvent(Unknown Source)
    at javax.swing.JComponent.processMouseEvent(Unknown Source)
    at java.awt.Component.processEvent(Unknown Source)
    at java.awt.Container.processEvent(Unknown Source)
    at java.awt.Component.dispatchEventImpl(Unknown Source)
    at java.awt.Container.dispatchEventImpl(Unknown Source)
    at java.awt.Component.dispatchEvent(Unknown Source)
    at java.awt.LightweightDispatcher.retargetMouseEvent(Unknown Source)
    at java.awt.LightweightDispatcher.processMouseEvent(Unknown Source)
    at java.awt.LightweightDispatcher.dispatchEvent(Unknown Source)
    at java.awt.Container.dispatchEventImpl(Unknown Source)
    at java.awt.Window.dispatchEventImpl(Unknown Source)
    at java.awt.Component.dispatchEvent(Unknown Source)
    at java.awt.EventQueue.dispatchEventImpl(Unknown Source)
    at java.awt.EventQueue.access$200(Unknown Source)
    at java.awt.EventQueue$3.run(Unknown Source)
    at java.awt.EventQueue$3.run(Unknown Source)
    at java.security.AccessController.doPrivileged(Native Method)
    at java.security.ProtectionDomain$1.doIntersectionPrivilege(Unknown Source)
    at java.security.ProtectionDomain$1.doIntersectionPrivilege(Unknown Source)
    at java.awt.EventQueue$4.run(Unknown Source)
    at java.awt.EventQueue$4.run(Unknown Source)
    at java.security.AccessController.doPrivileged(Native Method)
    at java.security.ProtectionDomain$1.doIntersectionPrivilege(Unknown Source)
    at java.awt.EventQueue.dispatchEvent(Unknown Source)
    at java.awt.EventDispatchThread.pumpOneEventForFilters(Unknown Source)
    at java.awt.EventDispatchThread.pumpEventsForFilter(Unknown Source)
    at java.awt.EventDispatchThread.pumpEventsForHierarchy(Unknown Source)
    at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
    at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
    at java.awt.EventDispatchThread.run(Unknown Source)

我不想得到直接的答案，我想了解我为什么会犯这些错误，如果有任何资源我应该使用。另外，我一直在寻找答案，但没有得到任何解释这个问题的答案。

感谢

线程获得对象锁定。也是多线程最重要的部分是安全地交织线程，以便所有线程都可以使用资源对象。如果处理不当，会导致死锁

当您使用stop时，您正在终止线程。那根线永远消失了。信息技术可能导致停止线程已获取的对象处于不一致状态

suspend已被弃用，因为一旦线程被挂起，其他线程将无法获得资源，因为挂起的线程在其上持有锁

下图描述了如何正确使用线程。使用sleep、wait和notify有效地交错线程

线程在对象上获得锁。也是多线程最重要的部分是安全地交织线程，以便所有线程都可以使用资源对象。如果处理不当，会导致死锁

当您使用stop时，您正在终止线程。那根线永远消失了。信息技术可能导致停止线程已获取的对象处于不一致状态

suspend已被弃用，因为一旦线程被挂起，其他线程将无法获得资源，因为挂起的线程在其上持有锁

下图描述了如何正确使用线程。使用sleep、wait和notify有效地交错线程

避免在线程上使用stop ans suspend，一旦线程停止，就无法重新启动它。暂挂已弃用。阅读关于线程的基本Oracle联机手册：阅读关于这些方法的API文档。它解释了这些方法被弃用的原因，还解释了您无法重新启动线程。线程不像视频，您可以随意启动/停止。我不久前就开始讨论这个问题。避免在线程上使用停止和挂起。一旦线程停止，您就无法重新启动它。暂挂已弃用。阅读关于线程的基本Oracle联机手册：阅读关于这些方法的API文档。它解释了这些方法被弃用的原因，还解释了您无法重新启动线程。线程不像视频，您可以随意启动/停止。我不久前就开始讨论这个问题。我可以知道图像的引用吗？我可以知道图像的引用吗？

Exception in thread "AWT-EventQueue-0" java.lang.IllegalThreadStateException
    at java.lang.Thread.start(Unknown Source)
    at com.HomeWork.HomeWork5$6.actionPerformed(HomeWork5.java:140)
    at javax.swing.AbstractButton.fireActionPerformed(Unknown Source)
    at javax.swing.AbstractButton$Handler.actionPerformed(Unknown Source)
    at javax.swing.DefaultButtonModel.fireActionPerformed(Unknown Source)
    at javax.swing.DefaultButtonModel.setPressed(Unknown Source)
    at javax.swing.plaf.basic.BasicButtonListener.mouseReleased(Unknown Source)
    at java.awt.Component.processMouseEvent(Unknown Source)
    at javax.swing.JComponent.processMouseEvent(Unknown Source)
    at java.awt.Component.processEvent(Unknown Source)
    at java.awt.Container.processEvent(Unknown Source)
    at java.awt.Component.dispatchEventImpl(Unknown Source)
    at java.awt.Container.dispatchEventImpl(Unknown Source)
    at java.awt.Component.dispatchEvent(Unknown Source)
    at java.awt.LightweightDispatcher.retargetMouseEvent(Unknown Source)
    at java.awt.LightweightDispatcher.processMouseEvent(Unknown Source)
    at java.awt.LightweightDispatcher.dispatchEvent(Unknown Source)
    at java.awt.Container.dispatchEventImpl(Unknown Source)
    at java.awt.Window.dispatchEventImpl(Unknown Source)
    at java.awt.Component.dispatchEvent(Unknown Source)
    at java.awt.EventQueue.dispatchEventImpl(Unknown Source)
    at java.awt.EventQueue.access$200(Unknown Source)
    at java.awt.EventQueue$3.run(Unknown Source)
    at java.awt.EventQueue$3.run(Unknown Source)
    at java.security.AccessController.doPrivileged(Native Method)
    at java.security.ProtectionDomain$1.doIntersectionPrivilege(Unknown Source)
    at java.security.ProtectionDomain$1.doIntersectionPrivilege(Unknown Source)
    at java.awt.EventQueue$4.run(Unknown Source)
    at java.awt.EventQueue$4.run(Unknown Source)
    at java.security.AccessController.doPrivileged(Native Method)
    at java.security.ProtectionDomain$1.doIntersectionPrivilege(Unknown Source)
    at java.awt.EventQueue.dispatchEvent(Unknown Source)
    at java.awt.EventDispatchThread.pumpOneEventForFilters(Unknown Source)
    at java.awt.EventDispatchThread.pumpEventsForFilter(Unknown Source)
    at java.awt.EventDispatchThread.pumpEventsForHierarchy(Unknown Source)
    at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
    at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
    at java.awt.EventDispatchThread.run(Unknown Source)