java - 如何重命名Java的线程

Question

这是从 http://www.java2s.com/Code/Java/SWT-JFace-Eclipse/SWTandThread.htm 创建的示例

import org.eclipse.swt.SWT;
import org.eclipse.swt.widgets.Display;
import org.eclipse.swt.widgets.Shell;
import org.eclipse.swt.widgets.Button;
import org.eclipse.swt.events.SelectionAdapter;
import org.eclipse.swt.events.SelectionEvent;


public class MultiThread extends Shell {

    Button btnNewButton = new Button(this, SWT.NONE);

    /**
     * Launch the application.
     * @param args
     */
    public static void main(String args[]) {
        try {
            Display display = Display.getDefault();
            MultiThread shell = new MultiThread(display);
            shell.open();
            shell.layout();
            while (!shell.isDisposed()) {
                if (!display.readAndDispatch()) {
                    display.sleep();
                }
            }
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

    /**
     * Create the shell.
     * @param display
     */
    public MultiThread(Display display) {
        super(display, SWT.SHELL_TRIM);


        btnNewButton.addSelectionListener(new SelectionAdapter() {
            @Override
            public void widgetSelected(SelectionEvent e) {
                applicationThread.start();
            }
        });
        btnNewButton.setBounds(86, 47, 68, 23);
        btnNewButton.setText("New Button");
        createContents();
    }

    /**
     * Create contents of the shell.
     */
    protected void createContents() {
        setText("SWT Application");
        setSize(450, 300);

    }

    @Override
    protected void checkSubclass() {
        // Disable the check that prevents subclassing of SWT components
    }


    final Runnable print = new Runnable() {
        public void run() {
          System.out.println("Print from thread: \t" + Thread.currentThread().getName());
        }
    };

    final Thread applicationThread = new Thread("currentThread") {
        public void run() {
          System.out.println("Hello from thread: \t" + Thread.currentThread().getName());
          getDisplay().syncExec(print);
          System.out.println("Bye from thread: \t" + Thread.currentThread().getName());
        }
      };

}

我的问题是:为什么第二次单击按钮时会发生 IllegalThreadStateException？是因为第二次单击创建了一个与上次同名的线程吗？我怎样才能避免这种情况？

提前谢谢您!

Answer 1

使用下面的代码设置线程名称

Thread.currentThread().setName("Hello");